Astrid Damayanti
Universitas Indonesia, Geography, Faculty Member
An earthquake is a natural disaster that is often found in Indonesia because its geological area is a meeting between three large tectonic plates. Earthquakes have a high level of danger due to unpredictable events. In the Sulawesi... more
An earthquake is a natural disaster that is often found in Indonesia because its geological area is a meeting between three large tectonic plates. Earthquakes have a high level of danger due to unpredictable events. In the Sulawesi region, especially Makassar, in 2017, there was an earthquake measuring 3 SR-6 SR, with a shallow epicenter. Epicenter distance calculation is used to determine the value of peak ground acceleration (PGA), which can then affect the intensity value in the hypocenter. This study aims to analyze the level of earthquake hazard using the PGA value as the basis for the initial reference of earthquake disaster mitigation. Variables used include rock type (geology), slope and the value of peak ground acceleration (PGA). Data on rock types were obtained from the Makassar City BPBD, and slope variables were processed from the SRTM DEM. Next, an overlay analysis was conducted to determine the level of earthquake hazard using a GIS application. The results showed that Makassar City had a majority of 94% of its area has a low level of earthquake hazard, while 6% of the area that had an earthquake hazard level was quite high in the east of Makassar. The frequency of earthquakes that were felt to be influential by the community (scale III MMI) was only two times in the last three decades (1996 and 2018).
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Seaweed cultivation is an alternative used in coastal areas. It is necessary to increase seaweed production because of the high carrying capacity and potential seaweed cultivation areas. The seaweed cultivation on Serangan Island... more
Seaweed cultivation is an alternative used in coastal areas. It is necessary to increase seaweed production because of the high carrying capacity and potential seaweed cultivation areas. The seaweed cultivation on Serangan Island continues to be pressured by the development of tourism and human activities. This study aims to analyze the suitability of the seaweed cultivation area in Serangan Island. The variables used in this study are water conditions such as sea surface temperature, salinity, total suspended solids, and dissolved oxygen—the data obtained through processing Landsat 8 imagery in January and May 2020. The method used is scoring and overlaying all variables, which are then analyzed spatially. The results showed a suitable area covering 616 Ha dominantly and the appropriate regions for 1,52 Ha, located in several parts of the northern and southern waters of Serangan Island in the rainy season. Whereas in the dry season, suitable areas are covering 223 Ha located in 31 grids in the northern, eastern, southern, and southwestern parts of Serangan Island, quite ideal for 392 Ha in 72 grids dominantly and unsuitable for 2,52 Ha located in part east and west grid of Serangan Island waters.
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Land-use change is a condition when the land has changed in terms of its use. The factor that can affect land-use change is distance and long-stay of the community. Its distance could make a land-use change from the rivers and roads.... more
Land-use change is a condition when the land has changed in terms of its use. The factor that can affect land-use change is distance and long-stay of the community. Its distance could make a land-use change from the rivers and roads. Land-use change can affect the livelihoods of the local community. This study aimed to evaluate the way land is changed in Tanjung Village, from 2011 to 2017, and its impact on the livelihoods of local communities. At each predetermined sample point, we collected data by interview and direct observation. Determination of sample points using a buffer analysis on satellite imagery. Respondents were selected using the accidental sampling method. To illustrate how urban land functions have changed in Tanjung Village and analyze their impact on livelihoods using spatial descriptive comparative purposes. This research shows that there has been a land-use change in Tanjung Village that is influenced by a physical factor, which is the distance from the rivers a...
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Erosion that exceeds the normal threshold can cause damage to the environment. The reduction of the physical properties of soil is a result of erosion. The USLE method is an empirical model that can predict the amount of erosion. The... more
Erosion that exceeds the normal threshold can cause damage to the environment. The reduction of the physical properties of soil is a result of erosion. The USLE method is an empirical model that can predict the amount of erosion. The purpose of this study was to determine the level of erosion hazard that occurs in the Tanralili sub-watershed. The benefit of this study is to find out areas that are experiencing severe erosion so that a recovery plan can be made for eroded soils to prevent even more significant decay Erosion calculated using the USLE (Universal Soil Loss Equation) model. There are several variables used in the calculation, which are the rainfall erosivity factor, the soil erodibility factor, the topographic factor, and the cropping management factor in looking at vegetation cover in the field using a survey method. The analysis used in this study is descriptive and spatial. Very high erosion occurs in almost all of the Tanraliili sub-watershed, about > 480 tons/ha/...
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Development and economic growth in an area can cause land cover changes. Penajam Paser Utara Regency, as a new capital candidate, is also predicted to experience in land cover changes. Land cover changes that are not following the land’s... more
Development and economic growth in an area can cause land cover changes. Penajam Paser Utara Regency, as a new capital candidate, is also predicted to experience in land cover changes. Land cover changes that are not following the land’s potential will cause environmental problems, so it is necessary to predict land cover changes by looking at patterns of land cover changes in the past and the factors that influence it. The purpose of this study is to analyze and predict the land cover change in Penajam Paser Utara Regency in 2031. The method used in this study is modeling using Cellular Automata - Markov. The driving factor of land cover change is used in making prediction models such as distance from the center of activity, distance from the road, distance from the river, elevation, and slope. The prediction land cover changes show that there has been an increase in plantation area and a decrease in forest area, while the development of the built-up area is not visible. The kappa ...
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Indonesia is an agrarian country with agrarian society producing and maintaining crops and farmland. Most of the agrarian society in Indonesia is concentrated in the Java island. The Mount Patuha Area in West Java is considered to be a... more
Indonesia is an agrarian country with agrarian society producing and maintaining crops and farmland. Most of the agrarian society in Indonesia is concentrated in the Java island. The Mount Patuha Area in West Java is considered to be a suitable area for agriculture. In May 2017, there has been erosion and major flood lately due to annual crop changed to seasonal crops in the Mount Patuha Area. This study aims to analyze spatially the suitability of agricultural plant types based on the WTU concept and soil types to prevent environmental damage from happening again and maintaining the sustainability of the agricultural sector. The Cultivated Land Region concept is also known as “Wilayah Tanah Usaha” (WTU) in Indonesia is an approach to manage agricultural land properly and sustainably based on the land elevation and slope as limiting factor from soil damage. Soil type also determines the plant suitability. This study is utilizing Geographic Information System (GIS) to overlay spatial...
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The increase of population could leads to residential area availability. This could lead to imbalance between population and available housing and could results in higher population pressure on the available area. Spatial modeling... more
The increase of population could leads to residential area availability. This could lead to imbalance between population and available housing and could results in higher population pressure on the available area. Spatial modeling prediction is needed as a prevention step to prevent excessive land cover change in the future. This research aims to analyze residential area carrying capacity and spatial modelling of land cover change of Samarinda in 2006, 2014 and 2020 using Cellular Automata Markov Chain (CAMC) and residential area carrying capacity index. The Cellular Automata Markov Chain (CAMC) results show that there is an expansion of residential area land cover which affected by driving factors that consist of distance from the nearby road, distance from the river, distance from the point of interest (health facility and education facility), slope, and elevation. Residential area land carrying capacity affected by population density, standard needed land area, and residential ar...
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Landslides disaster that occurred in Indonesia has caused environmental damage and claimed many lives. Bungaya has a high risk of landslide threat and includes areas affected by severe landslides, so landslide mitigation needs to do.... more
Landslides disaster that occurred in Indonesia has caused environmental damage and claimed many lives. Bungaya has a high risk of landslide threat and includes areas affected by severe landslides, so landslide mitigation needs to do. Landslide mitigation is an effort to reduce the risk of landslides, which can be applied by doing soil conservation. This study aims to find out the spatial pattern of vegetative conservation to prevent landslides in Bungaya. Slope morphology and slope gradient variables used to determine the potential area of landslide, obtained from BIG in 2018 and processed by the SMORPH Method. Data of vegetative conservation variables obtained by observation and interview. Analysis that used is an overlay technique on landslide potential areas, land use, and location of landslides. The highest potential of the landslide, clustered in the southern part of Bungaya, and moderate to low potential is randomly scattered. The highest potential is in Rannaloe and the lowes...
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Landslide in the Southern part of West Java Province, Garut regency in upstream Cimanuk River become a disaster for the population and its economic activities. The region is surrounded by active volcanoes, general condition of land... more
Landslide in the Southern part of West Java Province, Garut regency in upstream Cimanuk River become a disaster for the population and its economic activities. The region is surrounded by active volcanoes, general condition of land topography is bumpy, hilly and mountainous, weathering the soil and high rainfall accumulatively make this region is very potential to landslides. SINMAP is an additional program of ArcView software developed by Pack, Torboton, and Goodwin at Terractech Consulting Ltd, Utah State University in 1998. The purpose of this research is to analyze the potential areas of landslide disaster in Cimanuk River Basin, Garut regency, West Java with Stability Index Mapping (SINMAP) method. The variables used are rainfall, soil type and slope. In addition, this study also using spatial analysis techniques with overlay between the potential that is validated with the location of landslide. The results showed areas with potential classes: (1) 57.8% of Ci Manuk Hulu Flow A...
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Kekeringan merupakan salah satu fenomena yang terjadi sebagai dampak sirkulasi musiman ataupun perubahan iklim global. Berdasarkan data dan informasi bencana Indonesia Badan Nasional Penanggulangan Bencana (BNPB), Kabupaten Cilacap... more
Kekeringan merupakan salah satu fenomena yang terjadi sebagai dampak sirkulasi musiman ataupun perubahan iklim global. Berdasarkan data dan informasi bencana Indonesia Badan Nasional Penanggulangan Bencana (BNPB), Kabupaten Cilacap merupakan salah satu Kabupaten di Indonesia yang sering mengalami kekeringan parah. Penelitian ini bertujuan untuk mengetahui secara spasial bahaya kekeringan di Kabupaten Cilacap. Tingkat bahaya dihitung berdasarkan parameter fisik dari komponen keterpaparan dan sensitivitas dengan memanfaatkan Sistem Informasi Geografis (SIG) dan dianalisis dengan menggunakan metode overlay. Tingkat bahaya dipengaruhi oleh distribusi curah hujan, tutupan lahan, dan lereng. Semakin ke utara, jumlah curah hujan semakin tinggi, dan di wilayah tersebut tingkat bahaya termasuk kategori rendah, dan berlaku sebaliknya.
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Karst region of Maros Regency is valuable due to the natural resources available for the local economy. This study aims to map the karst geomorphology units using GIS techniques and to illustrate the use of the landscape by surrounding... more
Karst region of Maros Regency is valuable due to the natural resources available for the local economy. This study aims to map the karst geomorphology units using GIS techniques and to illustrate the use of the landscape by surrounding communities. Information on karst distribution is needed because the karst potential has scientific, economic, and humanitarian values, which are a wealth of resources. The variables used in this study are geological, altitude, drainage pattern, and slope maps. We determine the distribution of karst geomorphological units using the overlay method. Primary data processing and descriptive analysis are used to determine the utilization of each karst geomorphology unit. The result is that the karst has an area of 33.58 km² or 20% of the total area, which covers the 10.17 km² plain karst, 15.84 km² plateau karst, 6.07 km² cone karst, and 1.49 km² tower karst. The plain karst is used for agricultural land, while the plateau karst and cone karst for tourism ...
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Kecamatan Gerokgak berada di bagian barat Kabupaten Buleleng, Bali. Penggunaan tanah di Kecamatan Gerokgak sangat bervariasi seperti Taman Nasional Bali Barat, Pura Pulaki, Pelabuhan besar Celukan Bawang dan Pembangkit Listrik Tenaga Uap... more
Kecamatan Gerokgak berada di bagian barat Kabupaten Buleleng, Bali. Penggunaan tanah di Kecamatan Gerokgak sangat bervariasi seperti Taman Nasional Bali Barat, Pura Pulaki, Pelabuhan besar Celukan Bawang dan Pembangkit Listrik Tenaga Uap (PLTU) Celukan Bawang. Perkembangan penggunaan tanah cenderung mengarah ke pesisir. Hal ini dapat mempengaruhi kestabilan transportasi sedimen di pantai sehingga lebih rentan mengalami abrasi. Tujuan Penelitian ini adalah untuk menganalisis pengaruh perubahan penggunaan tanah di Kecamatan Gerokgak terhadap abrasi yang mempengaruhi perubahan garis pantai. Penelitian ini diharapkan dapat memberikan manfaat kepada pemerintah setempat sebagai pertimbangan dalam mengkaji pembangunan agar lebih memperhatikan keseimbangan lingkungan. Penelitian ini menggunakan citra Landsat 5 dan 8 dengan kurun waktu 20 tahun yaitu tahun 1997 dan 2017. Metodologinya dengan analisis perubahan garis pantai menggunakan citra landsat dan diolah dengan software ArcMap 10.4 dan tools DSAS untuk perhitungan jarak dan luas perubahan garis pantai. Hasil penelitian ini menunjukkan perubahan garis Pantai di Kecamatan Gerokgak terjadi di sepanjang pantai terutama di wilayah Pelabuhan dan PLTU Celukan Bawang. Kata Kunci : Abrasi, Perubahan garis pantai, Citra Landsat
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Rice is a basic need for most Indonesians. Subang Regency is one of the food districts in West Java with high paddy rice production. Fluctuation in the value of paddy rice production over the past five years makes production conditions... more
Rice is a basic need for most Indonesians. Subang Regency is one of the food districts in West Java with high paddy rice production. Fluctuation in the value of paddy rice production over the past five years makes production conditions uncertain and difficult to predict. Monitoring the condition of paddy rice fields over a short period of time would improve crop size prediction. This study aims to explain the paddy rice phenology using Sentinel 2-A imagery with NDVI (Normalized Difference Vegetation Index) algorithm in Subang Regency. The benefit of this study is to monitor the paddy rice phenology using remote sensing technology. Greenness values were recorded from Sentinel 2-A temporal 10 daily images with NDVI algorithm. Greenness values will be analysed descriptively according to CCTV recording on paddy rice fields. Based on the greenness value, NDVI can determine the beginning of the planting period and the end of the paddy rice planting period. The results show that Sentinel 2...
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Kota Pariaman merupakan salah satu kota di Indonesia yang terindikasi rawan terhadap bencana tsunami dikarenakan lokasinya yang berada di pinggir pantai serta berbatasan langsung dengan Samudera Hindia. Permukiman merupakan salah satu... more
Kota Pariaman merupakan salah satu kota di Indonesia yang terindikasi rawan terhadap bencana tsunami dikarenakan lokasinya yang berada di pinggir pantai serta berbatasan langsung dengan Samudera Hindia. Permukiman merupakan salah satu aset yang harus dijaga. Pemetaan zona keterpaparan permukiman terhadap tsunami diperlukan demi menjaga penduduk yang bertempat tinggal di kota tersebut serta sebagai acuan dalam mitigasi bencana dan meminimalkan kerugian akibat bencana tersebut. Pemetaan ini bertujuan untuk menaksir tingkat keterpaparan permukiman terhadap bencana tsunami. Tingkat keterpaparan dilihat dari dua komponen, yaitu tingkat bahaya (hazard), serta element at risk. Tingkat bahaya tsunami dilihat dari jarak dari garis pantai, ketinggian, wilayah lereng, serta jarak dari sungai sedangkan Element at risk atau elemen yang terkena bencana tsunami yaitu permukiman. Pemetaan keterpaparan ini menggunakan teknik overlay, metode skoring dan pembobotan dengan menggunakan software ArcMap 1...
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Mangrove forest is a very valuable forest, but despite its benefits mangrove forest continue to be degraded due to human activities. The purpose of this study was to map the distribution and to analyze mangrove forests’ health based on... more
Mangrove forest is a very valuable forest, but despite its benefits mangrove forest continue to be degraded due to human activities. The purpose of this study was to map the distribution and to analyze mangrove forests’ health based on the NDVI vegetation index value and environmental quality. Distribution of mangrove forest health was obtained through the processing of sentinel 2-A satellite imagery in 2020 and field measurements. The environmental quality of the mangrove forest was obtained by processing the physical parameters which are water temperature, water salinity, water pH, and substrate texture using the Ordinary Kriging method. The health of the mangrove forest of Taman Hutan Raya Ngurah Rai is dominated by healthy category mangroves. The health of the mangrove forest worsens when closer to the shore and riverbanks. Mangrove vegetation with good conditions tends to have optimal environmental quality conditions and vice versa.
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Kuta Selatan Sub-district has experienced changes in land cover due to the development of urbanization in recent years. One of the main problems caused by the progress of this development is the Land Surface Temperature (LST), which can... more
Kuta Selatan Sub-district has experienced changes in land cover due to the development of urbanization in recent years. One of the main problems caused by the progress of this development is the Land Surface Temperature (LST), which can cause several issues such as adverse socio-economic and environmental impacts on the urban population. This study provides information for the future urban developer by considering the implications of future temperature growth for city dwellers' thermal comfort, which should assist in developing and implementing management strategies to reduce the effects of urban heat. We used Landsat 7 ETM + and Landsat 8 OLI-TIRS as data sources for spatial-temporal analysis of land cover and LST in Kuta Selatan Sub-district for 2006, 2015, 2020 and their predictions in 2033 using the CA-Markov model. The results showed that the built-up area and LST in 2033 experienced a significant increase in space and distribution in Jimbaran, Benoa, Tanjung Benoa, and the...
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Indonesia is a country that has natural geological disasters. One of the most frequent geological disasters in Indonesia is a landslide. Landslides are movements of rock or soil mass due to gravitational forces pulling down accompanied by... more
Indonesia is a country that has natural geological disasters. One of the most frequent geological disasters in Indonesia is a landslide. Landslides are movements of rock or soil mass due to gravitational forces pulling down accompanied by a driving force on the slopes greater than the innate material. Identification and mapping of landslide potential areas has an important role as an effort to overcome and anticipate landslides. One of methods that can be used to determine potential landslides is the SMORPH method. The SMORPH method will produce a landslide classification based on a matrix between slope angle and slope form. This study aims to analyze the landslides potential distribution area in Kebumen Regency. Landslide identification was carried out at 30 locations of landslide events. Spatial analysis of landslide potential is done by overlaying the slope angle with slope form. The potential level for low landslides has a percentage of 79.54% in the southern and central parts o...
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Estuaries act as transitional areas on the coastal zone that connect highly saline ocean environments with fresh river systems. This dynamic aquatic ecosystem is created by deep fluctuations in water quality and salinity levels. Cilamaya... more
Estuaries act as transitional areas on the coastal zone that connect highly saline ocean environments with fresh river systems. This dynamic aquatic ecosystem is created by deep fluctuations in water quality and salinity levels. Cilamaya estuary supports a highly diverse marine ecosystem that is underutilized due to knowledge deficiencies of its variable rates of salinity. The aim of this study is to show the difference zone of estuary based on the sea surface salinity in the different time, so that Cilamaya Estuary areas can be utilized optimally for resource management. Sea surface salinity is obtained using algorithmic calculations based on the Sentinel-2A imagery. Salinity levels are studied based on the rainy and dry seasons. The higher salinity occur on the dry seasons, while on the rainy seasons have a lower salinity. Estuary areas experience 0.5-30 %o salinity placing it within the three zoning classes of the Venice System; Mexo-oligohaline; Mexo-mesohaline and Mexo-polyhaline.
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Erodibilitas tanah berkaitan erat dengan jumlah dan intensitas hujan. Tujuan penelitian ini adalah untuk menganalisis pola keterpaparan erosi akibat hujan menurut kondisi fisik wilayah. Data curah hujan harian tahun 2005-2016 digunakan... more
Erodibilitas tanah berkaitan erat dengan jumlah dan intensitas hujan. Tujuan penelitian ini adalah untuk menganalisis pola keterpaparan erosi akibat hujan menurut kondisi fisik wilayah. Data curah hujan harian tahun 2005-2016 digunakan untuk mendapatkan wilayah keterpaparan erosi yang diperoleh dari hasil scoring data berdasarkan frekuensi hari hujan (FHH) 5-10 mm/hari, FHH 11-25 mm/hari, FHH 26-50 mm/hari dan FHH >51mm/hari berbasis metode Thiessen. Validasi melalui survey lapang di 64 lokasi, dengan metode stratified sampling. Analisis spasial dilakukan dengan teknik overlay peta keterpaparan erosi dengan variabel jenis tanah, lereng dan penggunaan tanah, kemudian dilakukan uji validasi untuk mengetahui jenis erosi di lokasi sampel. Luas wilayah keterpaparan erosi tingkat berat di Kabupaten Kulon Progo mencapai 314,98 km² (53,7%). Keterpaparan erosi tingkat berat menurut kondisi fisik wilayah di Kulon Progo yaitu pada lereng 15-40%, dengan penggunaan tanah berupa tegalan dan je...
The West Coast of Banten is one of the tsunami-affected areas in Indonesia. People living in this region have to be aware of the possible tsunami occurrence anytime. PUSGEN 2017 research result indicated that Megathrust of Sunda Strait... more
The West Coast of Banten is one of the tsunami-affected areas in Indonesia. People living in this region have to be aware of the possible tsunami occurrence anytime. PUSGEN 2017 research result indicated that Megathrust of Sunda Strait has the potential to trigger an earthquake up to magnitude 8.8 generated in the seismic gap zone and strengthened the issue of tsunami threats. Therefore, we need a more detail study of these areas. In this study, we use the mathematical model of tsunamis from ComMIT software by NOAA and overlay it with the coastal population density. The outputs of ComMIT software are heights of run-up, inundation areas, and estimated time arrivals. The population density is determined by the housing population density method and the total number of populations divided by the area of settlements. The result is the number of people affected by tsunami obtained from the intersection between the area of inundation and the field of settlements. In Tanjung Lesung, there a...
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The mangrove forest is a very productive ecosystem, both economically and ecologically. Mangrove forests can protect settlements, buildings, and agriculture on the coast from strong winds or seawater intrusion, support the livelihoods of... more
The mangrove forest is a very productive ecosystem, both economically and ecologically. Mangrove forests can protect settlements, buildings, and agriculture on the coast from strong winds or seawater intrusion, support the livelihoods of coastal communities and store high carbon stocks. Regardless of its role, the Taman Hutan Raya Ngurah Rai Mangrove Forest continues to be threatened by human activities. This study aims to monitor changes in the area, health, and water quality of mangrove forests. The data used are Landsat 7 ETM + imagery and Landsat 8 OLI in 2010-2020. We used NDVI vegetation indices to analyze mangrove health and Total Suspended Solid (TSS) to investigate the water quality of the mangrove forest. Temporal water quality parameters are obtained by using the TSS algorithm on Landsat imagery. The results showed variations in mangrove forest area changes, NDVI values, and water quality. In 2010 - 2015 Mangrove Forest Area increase by 117.72 ha but decrease in 2015-2020...
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The mangrove forest is a very productive ecosystem, both economically and ecologically. Mangrove forests can protect settlements, buildings, and agriculture on the coast from strong winds or seawater intrusion, support the livelihoods of... more
The mangrove forest is a very productive ecosystem, both economically and ecologically. Mangrove forests can protect settlements, buildings, and agriculture on the coast from strong winds or seawater intrusion, support the livelihoods of coastal communities and store high carbon stocks. Regardless of its role, the Taman Hutan Raya Ngurah Rai Mangrove Forest continues to be threatened by human activities. This study aims to monitor changes in the area, health, and water quality of mangrove forests. The data used are Landsat 7 ETM + imagery and Landsat 8 OLI in 2010-2020. We used NDVI vegetation indices to analyze mangrove health and Total Suspended Solid (TSS) to investigate the water quality of the mangrove forest. Temporal water quality parameters are obtained by using the TSS algorithm on Landsat imagery. The results showed variations in mangrove forest area changes, NDVI values, and water quality. In 2010 - 2015 Mangrove Forest Area increase by 117.72 ha but decrease in 2015-2020...
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Abstrak Salah satu tujuan pengelolaan DAS terkait dengan upaya produktivitas penggunaan sumberdaya biotik (flora dan fauna) yang berbasis kegiatan pertanian. Agar dapat mendukung kegiatan pertanian secara berkelanjutan, maka perlu... more
Abstrak Salah satu tujuan pengelolaan DAS terkait dengan upaya produktivitas penggunaan sumberdaya biotik (flora dan fauna) yang berbasis kegiatan pertanian. Agar dapat mendukung kegiatan pertanian secara berkelanjutan, maka perlu menggunakan lahan dengan cara pengelolaan yang sesuai. Makalah ini membahas langkah-langkah strategis pengelolaan DAS dalam hubungannya dengan pencapaian tujuan produktivitas pertanian yang berkelanjutan. Secara khusus juga dihubungkan dengan penggunaan teknik analisis zone agroekologi untuk mewujudkan tujuan tersebut. Hasil studi literatur ini memperlihatkan bahwa sistem informasi geografi atau teknik penginderaan jauh dapat membantu untuk mengevaluasi sistem produksi yang tepat untuk suatu lahan dan mencari alternatif komoditas untuk diusahakan dengan cepat dan tepat dalam rangka mencari solusi pembangunan pertanian saat ini. Kata kunci: berkelanjutan, DAS, pengelolaan, zone agroekolo. PENDAHULUAN Sebuah DAS memiliki lima fungsi utama yang tercakup dalam...
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Land function change can impact on decreasing green open space and land surface temperature (LST), which is one of the important parameters in environmental change. This study aims to identify vegetation density change and its impacts on... more
Land function change can impact on decreasing green open space and land surface temperature (LST), which is one of the important parameters in environmental change. This study aims to identify vegetation density change and its impacts on land surface temperature in Kuta Utara Subdistrict, by comparing two vegetation indices to decide which vegetation index is more suitable if it is associated with LST. The Normalized Difference Vegetation Index (NDVI) and Enhanced Vegetation Index (EVI) were used to knowing vegetation density change. This study estimated the brightness temperature of the satellite to find out the land surface temperature. NDVI, EVI, and LST values were obtained through Landsat ETM+ and Landsat OLI in 2010, 2015, and 2020. The values are analyzed using the spatial-temporal analysis method to see the vegetation density change and LST. The results of NDVI and EVI analysis showed that there are changes in vegetation density for each year, especially in the east and west...
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Penajam Subdistrict is the center of government and economy of the North Penajam Paser Regency. It has an area of oil palm plantations that continues to grow every year. The massive growth of oil palm plantations has resulted in... more
Penajam Subdistrict is the center of government and economy of the North Penajam Paser Regency. It has an area of oil palm plantations that continues to grow every year. The massive growth of oil palm plantations has resulted in converting agricultural land to oil palm plantations. The transformation of land function occurs because oil palm plantations are considered more profitable than planting rice. This study aims to analyze and predict land-use changes for oil palm in Penajam Subdistrict in 2031. The method used in this study uses a Geographical Information System (GIS) approach with the CA-Markov prediction model. The drivers of land-use change as input to the CA-Markov model consist of distance from the road, distance from the river, distance from the forest, elevation, and slope. The results showed an increase in the area of oil palm plantations and a decrease in the forest area. The Kappa test results show a value of 88%, which means it has an adequate accuracy level. In 20...
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Paddy-fields in Indonesia continue to change their function every year as a result of the increase in land for settlements, as well as in North Penajam Paser Regency. The plan to relocate the capital city to North Penajam Paser Regency... more
Paddy-fields in Indonesia continue to change their function every year as a result of the increase in land for settlements, as well as in North Penajam Paser Regency. The plan to relocate the capital city to North Penajam Paser Regency can support various impacts on land conversion, such as reducing paddy-fields so that paddy-fields productivity can be disrupted and reduce food availability. The purpose of this study to analyze and predict the availability of paddy-fields in 2031 in Babulu Subdistrict, North Penajam Paser Regency, using the CA-Markov method. Changes in paddy-field use were identified using remote sensing. This study’s driving factors are the distance from the river, distance from the road, distance from the settlement, slope, and elevation. The results showed that paddy-fields in the Babulu Subdistrict have increased during the period 2009 – 2020. Paddy-fields in 2031 will reach 12.3% of the total area. Paddy-fields have an increased probability in the regions that ...
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Large-scale mining activity is the major environmental issue, including water pollution caused by Acid Mine Drainage (AMD). Samarinda, which is located in the province of East Kalimantan, Indonesia, has open pits and acid contributing... more
Large-scale mining activity is the major environmental issue, including water pollution caused by Acid Mine Drainage (AMD). Samarinda, which is located in the province of East Kalimantan, Indonesia, has open pits and acid contributing land as a source of AMD pollutants. The potential AMD pollution can be assessed by utilizing Geographic Information System (GIS) and Remote Sensing (RS), which are considered reliable tools for measuring, mapping, monitoring, and model making for an area. The variables used in this research are void distribution, land cover, soil type, rainfall, topography, water body, and groundwater. The integration of these variables is used to analyze the potential of AMD pollution to water bodies by acid contributing land. Meanwhile, the void distribution and groundwater integration data are used to analyze the potential of AMD pollution to groundwater by voids. The overlay method is employed to analyze the potential spatial patterns of AMD pollution in the study ...
Located in west coast of Java, Simpenan Subdistrict at Sukabumi District has variety of coastal landscape. The main objective of this research to identification landform charateristics for landscape and also identify land use using Land... more
Located in west coast of Java, Simpenan Subdistrict at Sukabumi District has variety of coastal landscape. The main objective of this research to identification landform charateristics for landscape and also identify land use using Land Utility Area. This research examines coastal landscape that affected by landforms that consist of relief, landuse, social aspect which is cropping pattern and analyze with the model of Land Utility Area. Spatial and descriptive analysis was carried out in this study by overlay and cross section analysis method. The result of this research indicates that coastal landscape pattern in Simpenan Subdistrict is dominated by mountainous hilly terrain around 60,1% from total area, hilly terrain shape about 30,6% from total area, land use of mixed garden use 30,1% of the area and rice cropping pattern once a year. The coastal landscape pattern is generally still in accordance with the Land Utility Area model but there are some unsuitable located in the second...
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Sinkhole is a depression of the land surface, causing hazardous effects on the karst landscape. Land subsidence is a phenomenon of sinkhole formation due to karstification. Land subsidence associated with any of the existing... more
Sinkhole is a depression of the land surface, causing hazardous effects on the karst landscape. Land subsidence is a phenomenon of sinkhole formation due to karstification. Land subsidence associated with any of the existing evaporite-karst sinkholes Land subsidence is a gradual settling or sudden sinking of the Earth’s surface, which can be very dangerous as it relates to life on the surface and infrastructure planning. Ponjong and Semanu District, Gunungkidul Regency, are included in the Gunung Sewu Karst area, with landscapes highly influenced by the karstification process. Decision-makers need increasing attention to make assessments also mitigation on karst management. This study aims to determine the potential areas of land subsidence caused by natural factors in the karst landscape in the Ponjong and Semanu District, Gunungkidul Regency using integrated geospatial technology. For making some maps, we initially need a process from SRTM. Land Surface Temperature map, The Normal...
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Land-use change is a regional development process and one type of land-use that has undergone many land-use changes in agriculture. Palaran Subdistrict, as one of the largest agricultural land in Samarinda City, has experienced an... more
Land-use change is a regional development process and one type of land-use that has undergone many land-use changes in agriculture. Palaran Subdistrict, as one of the largest agricultural land in Samarinda City, has experienced an agricultural land conversion over the past 15 years, mainly caused by mining activities and thus led to the agricultural land reduction. This study aims to analyze agricultural land-use changes in 2006, 2014, and 2020 in Palaran Subdistrict, Samarinda City. The method used in this study is a spatial comparison of agricultural land-use in 2006 and 2014; also between 2014 and 2020 using Land Change Modeler tools in Idrisi Selva 17. Land-use obtained from manual digitation based on Landsat 5 imagery in 2006, Landsat 8 imagery in 2014, and Sentinel-2a imagery in 2020. This study’s results indicate agricultural land-use change in the northern part of the Palaran Subdistrict that changed into a settlement. In the middle of the Palaran Subdistrict, that changed i...
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A city structure is a composition of forming a city. The shape of its city can characterize the development. City development must be sustainable, then the city structure formed must also support sustainable development. Pixel-based image... more
A city structure is a composition of forming a city. The shape of its city can characterize the development. City development must be sustainable, then the city structure formed must also support sustainable development. Pixel-based image classification is a method used in remote sensing to quickly and multi-temporally identify structures of development of the city. Balikpapan is a National Activity Center (PKN) that has a strategic location for national and international transport routes and, therefore, can accelerate the development of the city. The study aims to identify the development of city structures formed in Balikpapan from 2009, 2014, and 2019 by using pixel-based image classification and overlay analysis. The variables of this study are developed land, non-developed land, vegetation land, and water body. The study results show the development of the city structure by forming several core structures in Balikpapan, or called multi-nuclei, on city structure theory by Harris...
Research Interests:
Research Interests:
Dinamika kependudukan dan sumber daya air ternyata menunjukkan hubungan timbal balik. Dinamika penduduk sangat berpengaruh dalam menentukan lokasi dan jenis proyek pengelolaan sumber daya air disesuaikan dengan karakteristik fungsional,... more
Dinamika kependudukan dan sumber daya air ternyata menunjukkan hubungan timbal balik. Dinamika penduduk sangat berpengaruh dalam menentukan lokasi dan jenis proyek pengelolaan sumber daya air disesuaikan dengan karakteristik fungsional, skala dari proyek, perkiraan biayanya, serta manfaat dari proyek tersebut. Makalah ini menunjukkan bagaimana hubungan kebutuhan air dan dinamika penduduk diestimasi dengan pendekatan matematis. Model matematis ini kerap memperhitungkan kegiatan ekonomi terkait, selain faktor lain yaitu dampak harga permintaan, konservasi air dan pendekatan nonstruktural lainnya, serta keterkaitan air dan energi. Dalam makalah ini, akan dibahas mengenai hal-hal yang terkait dengan studi demografi sebagai sebuah ilmu yang digunakan untuk melakukan estimasi dinamika penduduk dan bagaimana hubungannya terkait dengan perhitungan kebutuhan akan sumber daya air. Kata kunci: dinamika, kebutuhan, penduduk, sumber daya air
Research Interests: Art and Jurnal Geografi
Erosion is the loss of a soil or parts of soil from a place that is transported by water or wind to another place. The growing quantity of human activity makes buildings around upstream Ciliwung watershed Bogor, West Java, Indonesia... more
Erosion is the loss of a soil or parts of soil from a place that is transported by water or wind to another place. The growing quantity of human activity makes buildings around upstream Ciliwung watershed Bogor, West Java, Indonesia increase as well. The current condition of natural and environmental resources in the upstream Ciliwung watershed is quite apprehensive where environmental damage is already severe due to inappropriate use and use of land and urgent life needs. Therefore, mapping the spatial distribution of erosion hazards in the relevant research area needs to be done. The method that researcher use to predict erosion is the Universal Soil Loss Equation (USLE) equation. This equation is an erosion estimation model used to calculate the amount of erosion that occurs in the long term in an area. This equation can predict the average erosion rate in a plot of land at various slope steepness with a certain rain pattern for each existing cropping effort and soil management a...
Salah satu tujuan pengelolaan DAS terkait dengan upaya produktivitas penggunaan sumberdaya biotik (flora dan fauna) yang berbasis kegiatan pertanian. Agar dapat mendukung kegiatan pertanian secara berkelanjutan, maka perlu menggunakan... more
Salah satu tujuan pengelolaan DAS terkait dengan upaya produktivitas penggunaan sumberdaya biotik (flora dan fauna) yang berbasis kegiatan pertanian. Agar dapat mendukung kegiatan pertanian secara berkelanjutan, maka perlu menggunakan lahan dengan cara pengelolaan yang sesuai. Makalah ini membahas langkah-langkah strategis pengelolaan DAS dalam hubungannya dengan pencapaian tujuan produktivitas pertanian yang berkelanjutan. Secara khusus juga dihubungkan dengan penggunaan teknik analisis zone agroekologi untuk mewujudkan tujuan tersebut. Hasil studi literatur ini memperlihatkan bahwa sistem informasi geografi atau teknik penginderaan jauh dapat membantu untuk mengevaluasi sistem produksi yang tepat untuk suatu lahan dan mencari alternatif komoditas untuk diusahakan dengan cepat dan tepat dalam rangka mencari solusi pembangunan pertanian saat ini. Kata kunci: berkelanjutan, DAS, pengelolaan, zone agroekolo.