Groundwater resources is categorized as an important and renewable resources, and use for a lot o... more Groundwater resources is categorized as an important and renewable resources, and use for a lot of purposes. Nowadays, it is globally understand that groundwater is under threat of degradation due to an appropriate use and should be managed carefully to achieve its sustainable use for the future generations. The north slope of Bromo Volcano in the East Java, Indonesia, is known with the high productivity aquifer area. In this region, there are a lot of springs and one of them has water discharge > 5000 L/s called as Umbulan spring. Besides, most of the people in this regions drill their own deep well to fulfill their need of water for household purposes, agricultures, commercials and industries. Therefore, necessary action should be taken in order to sustain the use of groundwater in this area. A vital tool to good groundwater management is a well-conceived understanditrg of the geometry aquifer system and this can be done by conducting surface observation which supported by the geo-electrical measurement in this area. Almost 100 measurements of vertical profiling using Schlumberger method were conducted and a fence diagram of sub-surface lithology succession can reveal. From the fence diagram, it is found that the aquifer system on this region are developed by four multi layers aquifers (unconfined to confined aquifer) of sandstone, sand and gravel, which hydraulically connected each other on some local area and the basement of the aquifer is defined to be tertiary volcaniclastics rocks. Following the regional flows of groundwater, the thickness of the aquifers is increased in the central part up to 200 m and decrease to the sea direction to less than 100 m. It is also recognized that in the regions, the most existing deep wells were abstract water mainly from the middle aquifer layers, which become the reason of the decreasing of the artesian water level.
Landfill is a place for disposal of waste materials by burial and is method for organized waste d... more Landfill is a place for disposal of waste materials by burial and is method for organized waste disposal. There are many impacts that can occur when a landfill is operated such as contamination (chloride) of groundwater and wastes can come from different places such as industry, house, market, and so on which can produce chloride concentration are different. In 1992, Jatibarang landfill has been operated and is the biggest landfill in Semarang city. Everyday the wastes in Semarang which are collected to dump in Jatibarang landfill are about 3140 m3 that can produce leachates which give value of chloride concentration is 2612,98mg/L. In order to understand the nature of chloride plume and to understand chloride loads to the river (near Jatibarang landfill) from Jatibarang landfill, study of analytical model 1-D and mass balance approach are carried out to estimate chloride plume and chloride loads to the river. Finally, the result of chloride plume map and amount of chloride loads from landfill can provide some understanding in order to support the groundwater and surface water management by the community and different government agencies to protect water resources.
IOP Conference Series: Earth and Environmental Science, 2021
The high groundwater use in the Randublatung Groundwater Basin area relates to groundwater abstra... more The high groundwater use in the Randublatung Groundwater Basin area relates to groundwater abstraction for agriculture. Therefore, a question arises on how much groundwater resources in this area may support agricultural groundwater usage. This research has the objective to quantify the groundwater resources in this area. This research conducts a geoelectrical investigation to identify the aquifer’s lithology and observe the groundwater level. The research reveals that resistivity values of subsurface rock layers in the research area range from 0.13 to 124.86 Ωm. The aquifer layer consisted of two aquifer systems, with the hydraulic conductivity varies of the aquifer layer is 0.0001 cm/s until 0.01 cm/s. The aquifer layers estimated to be found at depths vary 5 – 90 m from the ground with thickness range from 10 to 70 m. Meanwhile, the aquiclude layers consisted of clay, silty clay, and sandy clay was estimated to be found at depths varies 0 – 50 m from the ground with thickness var...
IOP Conference Series: Earth and Environmental Science, 2021
Randublatung groundwater basin is one of the groundwaters basins with massive utilization of grou... more Randublatung groundwater basin is one of the groundwaters basins with massive utilization of groundwater pumping. However, the knowledge of the comprehensive hydrogeological system in this groundwater basin is limited, so this research aims to determine a comprehensive hydrogeological conceptual model of the Randublatung groundwater basin. The methodology was conducted by collecting secondary and primary data of deep and shallow wells to evaluate boundaries of pattern and direction of groundwater flow and develop the aquifer system’s geometry. The result shows that the groundwater flow boundaries are Grogol River in the west, Wado River in the East, Bengawan Solo river in the South as a river boundary, and Rembang Mountains in the North as a constant head boundary. Therefore, groundwater flows from the hills area to the Bengawan Solo River and the north as the river’s flow. Based on the log bor evaluation, the aquifer system of the study area consist of an unconfined aquifer with a ...
Kawasan Malioboro merupakan suatu kawasan wisata di Kota Yogyakarta, yang banyak dikunjungi wisat... more Kawasan Malioboro merupakan suatu kawasan wisata di Kota Yogyakarta, yang banyak dikunjungi wisatawan, baik dari dalam negeri maupun wisatawan mancanegara. Banyaknya pengunjung dan akomodasi penginapan berupa hotel-hotel dengan berbagai level yang ada di kawasaan tersebut, memungkinkan terjadinya peningkatan kebutuhan akan air bersih. Sementara suplai air bersih di kawasan tersebut diketahui sebagian besar berasal dari dari airtanah, terutama untuk kebutuhan hotel. Pengambilan airtanah yang berlebihan (over-exploitation) dapat berdampak terhadap penurunan muka airtanah. Penurunan muka airtanah merupakan permasalah yang umum terjadi di lingkungan perkotaan. Penelitian ini bertujuan untuk mengidentifikasi area-area terjadinya pengambilan airtanah yang berlebihan (over-exploitation), sebagai tahap awal dari studi hidrogeologi daerah penelitian dan dapat menjadi bahan pertimbangan dalam upaya pengelolaan airtanah di daerah penelitian. Untuk mengidentifikasi area-area terjadinya pemompaa...
Pantai Menganti di Kecamatan Kesugihan, Kabupaten Cilacap, Jawa Tengah, merupakan salah satu pant... more Pantai Menganti di Kecamatan Kesugihan, Kabupaten Cilacap, Jawa Tengah, merupakan salah satu pantai di pesisir selatan Jawa. Air tanah berada pada akuifer pasiran dengan kedalaman sangat dangkal (1-2 m) dari permukaan tanah. Tataguna lahan yang berkembang adalah pemukiman, perkebunan, persawahan, tambak, dan pembangkit listrik tenaga uap (PLTU). Penelitian bertujuan mengidentifikasi intrusi air laut pada akuifer di Pantai Menganti menurut karakteristik fisika-kimia dan kadar ion klorida serta keterkaitannya dengan tataguna lahan. Pengukuran dan pengambilan sampel air tanah dilakukan dengan metode random sampling pada tataguna lahan yang berbeda. Pengukuran karakteristik fisika dan kimia air tanah yaitu pH, daya hantar listrik (DHL), total dissolved solid (TDS) dilakukan langsung di lapangan sedangkan analisis kadar ion klorida di laboratorium. Penelitian menunjukkan air tanah alami secara umum memiliki karakteristik pH relatif normal, DHL < 1500 µS/cm, TDS < 1000 mg/L, dan ka...
Landslides are a recurring phenomenon that disrupts the natural environment and causes yearly pro... more Landslides are a recurring phenomenon that disrupts the natural environment and causes yearly property damage, economic losses, and fatalities. The damage is expected to increase due to deforestation rates, population growth, agriculture, slope-building infrastructure expansion, and global climate change. This study assesses the susceptibility to landslides through Weight of Evidence (WoE) and Frequency Ratio (FR) methods in the Temanggung Regency, Central Java Province, Indonesia, that located on the slopes of two active volcanoes. Initially, a landslide record and the input parameters of the landslide controlling factors were prepared from field surveys, remote sensing data, and secondary data and processed by a geographic information system (GIS). Six landslide parameters in thematic layer maps were selected to develop landslide susceptibility: slope, lithology type, geological structure density, land cover, and rainfall. According to the WoE and FR models, a landslide susceptibi...
Leakage or seepage in reservoirs and dams has the potential for structural instabilities persuade... more Leakage or seepage in reservoirs and dams has the potential for structural instabilities persuaded by water leakage pathways and linked to economic consequences. An environmental isotopic and hydrochemical research was conducted to determine the source and origin of seepages on the tunnel of Pandanduri dam, Lombok Island, Indonesia. This study aimed to examine the source of the tunnel leak on the dam site and the origin or source of water at the point of leakage based on water chemistry data and stable isotopes. To identify the source of the leakage water in the tunnel dam, 33 samples of the leakage water, groundwater, reservoir water, river water, and rainfall water were taken for chemical and isotopic composition analysis. The field measured the reservoir level, spring discharges, and physicochemical parameters (EC, pH, TDS, TSS). The physicochemical parameters show that the leakages water is similar to reservoir water. The types of leakage water in the tunnel belong to alkaline w...
SoTtion ard frccipilation of nungatrcse in grouodwater rclnediation Llsillg conrposl rnrl Tero va... more SoTtion ard frccipilation of nungatrcse in grouodwater rclnediation Llsillg conrposl rnrl Tero valcnl irolr (ZVI) werc investjgalcd bl batch and colunm cxperirrcnts. In batcl tcsrs. cornpost rs orore cffcclile than Z\rl to irxnobilizc nungaDese, wiih the maximum rirmo\,.1l of 23E.09 mnrol Mn. kg I of compo-* accorrling to l-angmuir equa{ion- High clfioieDcv of I\,ln re,roval onro conlpost is brobably nol onl) b_lr physical sorplion bur aiso by sur-ticc complexaiion \\,i1h carbo\ylic gr;ups in the corrrpost. Tlris rcsult \\,as confinred with FTIR data thri sho\u ne$. peaks at (,7i cmi alter conlacted witll nrangancsc solution. I\,langaoesc was also inmobilizcd lirough soqrlion onto ZVI due to high srLfacc area, a d parlly b), precipirarion rs miinganese oxidc because of intense alkalization. In columrl atedals_ aftcr introduciog mangancse solution lor l6 porc yolumes (p\J. lnaDsaocsc rvas prcdominanll], irnnrobilized in uppcr p.rlt of the coluuri. it is corlsidered rhal composl \\ias degradcd and rhc sufxce ofZVl gaDulcs was alrcadv unilblntcd and conosion producls xre thc nlost accumulatcd on Z\,1 E.rnuL." nerr ih( inlet hecJr"t ZvI |.1s bcen cortactc{] wiih high concentrations ollnanlllnese fbr the longesi timc in the ost botlorn pans. This \!as aiso suppci€d by XRir data liom ZVI grains that Dtatganese was Lhe larecsr in the mosl bottom segmenl. 1he results ofgeochcnrical calc0lrtiu|\ alon3 (irh rhe Sl:M ina!< suggc"r that pa ly ol maoganese $crc also prccipitared wifi cxrbonates. The result dcnxmsn.aics thal combi llliorr of conrpost and ZVI is more elicclivc 1() ielrovc nungancsc thnn using single marcrial duc to thc dillercnt nrecbanism olremoval lioDt cacil material.
Groundwater resources is categorized as an important and renewable resources, and use for a lot o... more Groundwater resources is categorized as an important and renewable resources, and use for a lot of purposes. Nowadays, it is globally understand that groundwater is under threat of degradation due to an appropriate use and should be managed carefully to achieve its sustainable use for the future generations. The north slope of Bromo Volcano in the East Java, Indonesia, is known with the high productivity aquifer area. In this region, there are a lot of springs and one of them has water discharge > 5000 L/s called as Umbulan spring. Besides, most of the people in this regions drill their own deep well to fulfill their need of water for household purposes, agricultures, commercials and industries. Therefore, necessary action should be taken in order to sustain the use of groundwater in this area. A vital tool to good groundwater management is a well-conceived understanditrg of the geometry aquifer system and this can be done by conducting surface observation which supported by the geo-electrical measurement in this area. Almost 100 measurements of vertical profiling using Schlumberger method were conducted and a fence diagram of sub-surface lithology succession can reveal. From the fence diagram, it is found that the aquifer system on this region are developed by four multi layers aquifers (unconfined to confined aquifer) of sandstone, sand and gravel, which hydraulically connected each other on some local area and the basement of the aquifer is defined to be tertiary volcaniclastics rocks. Following the regional flows of groundwater, the thickness of the aquifers is increased in the central part up to 200 m and decrease to the sea direction to less than 100 m. It is also recognized that in the regions, the most existing deep wells were abstract water mainly from the middle aquifer layers, which become the reason of the decreasing of the artesian water level.
Landfill is a place for disposal of waste materials by burial and is method for organized waste d... more Landfill is a place for disposal of waste materials by burial and is method for organized waste disposal. There are many impacts that can occur when a landfill is operated such as contamination (chloride) of groundwater and wastes can come from different places such as industry, house, market, and so on which can produce chloride concentration are different. In 1992, Jatibarang landfill has been operated and is the biggest landfill in Semarang city. Everyday the wastes in Semarang which are collected to dump in Jatibarang landfill are about 3140 m3 that can produce leachates which give value of chloride concentration is 2612,98mg/L. In order to understand the nature of chloride plume and to understand chloride loads to the river (near Jatibarang landfill) from Jatibarang landfill, study of analytical model 1-D and mass balance approach are carried out to estimate chloride plume and chloride loads to the river. Finally, the result of chloride plume map and amount of chloride loads from landfill can provide some understanding in order to support the groundwater and surface water management by the community and different government agencies to protect water resources.
IOP Conference Series: Earth and Environmental Science, 2021
The high groundwater use in the Randublatung Groundwater Basin area relates to groundwater abstra... more The high groundwater use in the Randublatung Groundwater Basin area relates to groundwater abstraction for agriculture. Therefore, a question arises on how much groundwater resources in this area may support agricultural groundwater usage. This research has the objective to quantify the groundwater resources in this area. This research conducts a geoelectrical investigation to identify the aquifer’s lithology and observe the groundwater level. The research reveals that resistivity values of subsurface rock layers in the research area range from 0.13 to 124.86 Ωm. The aquifer layer consisted of two aquifer systems, with the hydraulic conductivity varies of the aquifer layer is 0.0001 cm/s until 0.01 cm/s. The aquifer layers estimated to be found at depths vary 5 – 90 m from the ground with thickness range from 10 to 70 m. Meanwhile, the aquiclude layers consisted of clay, silty clay, and sandy clay was estimated to be found at depths varies 0 – 50 m from the ground with thickness var...
IOP Conference Series: Earth and Environmental Science, 2021
Randublatung groundwater basin is one of the groundwaters basins with massive utilization of grou... more Randublatung groundwater basin is one of the groundwaters basins with massive utilization of groundwater pumping. However, the knowledge of the comprehensive hydrogeological system in this groundwater basin is limited, so this research aims to determine a comprehensive hydrogeological conceptual model of the Randublatung groundwater basin. The methodology was conducted by collecting secondary and primary data of deep and shallow wells to evaluate boundaries of pattern and direction of groundwater flow and develop the aquifer system’s geometry. The result shows that the groundwater flow boundaries are Grogol River in the west, Wado River in the East, Bengawan Solo river in the South as a river boundary, and Rembang Mountains in the North as a constant head boundary. Therefore, groundwater flows from the hills area to the Bengawan Solo River and the north as the river’s flow. Based on the log bor evaluation, the aquifer system of the study area consist of an unconfined aquifer with a ...
Kawasan Malioboro merupakan suatu kawasan wisata di Kota Yogyakarta, yang banyak dikunjungi wisat... more Kawasan Malioboro merupakan suatu kawasan wisata di Kota Yogyakarta, yang banyak dikunjungi wisatawan, baik dari dalam negeri maupun wisatawan mancanegara. Banyaknya pengunjung dan akomodasi penginapan berupa hotel-hotel dengan berbagai level yang ada di kawasaan tersebut, memungkinkan terjadinya peningkatan kebutuhan akan air bersih. Sementara suplai air bersih di kawasan tersebut diketahui sebagian besar berasal dari dari airtanah, terutama untuk kebutuhan hotel. Pengambilan airtanah yang berlebihan (over-exploitation) dapat berdampak terhadap penurunan muka airtanah. Penurunan muka airtanah merupakan permasalah yang umum terjadi di lingkungan perkotaan. Penelitian ini bertujuan untuk mengidentifikasi area-area terjadinya pengambilan airtanah yang berlebihan (over-exploitation), sebagai tahap awal dari studi hidrogeologi daerah penelitian dan dapat menjadi bahan pertimbangan dalam upaya pengelolaan airtanah di daerah penelitian. Untuk mengidentifikasi area-area terjadinya pemompaa...
Pantai Menganti di Kecamatan Kesugihan, Kabupaten Cilacap, Jawa Tengah, merupakan salah satu pant... more Pantai Menganti di Kecamatan Kesugihan, Kabupaten Cilacap, Jawa Tengah, merupakan salah satu pantai di pesisir selatan Jawa. Air tanah berada pada akuifer pasiran dengan kedalaman sangat dangkal (1-2 m) dari permukaan tanah. Tataguna lahan yang berkembang adalah pemukiman, perkebunan, persawahan, tambak, dan pembangkit listrik tenaga uap (PLTU). Penelitian bertujuan mengidentifikasi intrusi air laut pada akuifer di Pantai Menganti menurut karakteristik fisika-kimia dan kadar ion klorida serta keterkaitannya dengan tataguna lahan. Pengukuran dan pengambilan sampel air tanah dilakukan dengan metode random sampling pada tataguna lahan yang berbeda. Pengukuran karakteristik fisika dan kimia air tanah yaitu pH, daya hantar listrik (DHL), total dissolved solid (TDS) dilakukan langsung di lapangan sedangkan analisis kadar ion klorida di laboratorium. Penelitian menunjukkan air tanah alami secara umum memiliki karakteristik pH relatif normal, DHL < 1500 µS/cm, TDS < 1000 mg/L, dan ka...
Landslides are a recurring phenomenon that disrupts the natural environment and causes yearly pro... more Landslides are a recurring phenomenon that disrupts the natural environment and causes yearly property damage, economic losses, and fatalities. The damage is expected to increase due to deforestation rates, population growth, agriculture, slope-building infrastructure expansion, and global climate change. This study assesses the susceptibility to landslides through Weight of Evidence (WoE) and Frequency Ratio (FR) methods in the Temanggung Regency, Central Java Province, Indonesia, that located on the slopes of two active volcanoes. Initially, a landslide record and the input parameters of the landslide controlling factors were prepared from field surveys, remote sensing data, and secondary data and processed by a geographic information system (GIS). Six landslide parameters in thematic layer maps were selected to develop landslide susceptibility: slope, lithology type, geological structure density, land cover, and rainfall. According to the WoE and FR models, a landslide susceptibi...
Leakage or seepage in reservoirs and dams has the potential for structural instabilities persuade... more Leakage or seepage in reservoirs and dams has the potential for structural instabilities persuaded by water leakage pathways and linked to economic consequences. An environmental isotopic and hydrochemical research was conducted to determine the source and origin of seepages on the tunnel of Pandanduri dam, Lombok Island, Indonesia. This study aimed to examine the source of the tunnel leak on the dam site and the origin or source of water at the point of leakage based on water chemistry data and stable isotopes. To identify the source of the leakage water in the tunnel dam, 33 samples of the leakage water, groundwater, reservoir water, river water, and rainfall water were taken for chemical and isotopic composition analysis. The field measured the reservoir level, spring discharges, and physicochemical parameters (EC, pH, TDS, TSS). The physicochemical parameters show that the leakages water is similar to reservoir water. The types of leakage water in the tunnel belong to alkaline w...
SoTtion ard frccipilation of nungatrcse in grouodwater rclnediation Llsillg conrposl rnrl Tero va... more SoTtion ard frccipilation of nungatrcse in grouodwater rclnediation Llsillg conrposl rnrl Tero valcnl irolr (ZVI) werc investjgalcd bl batch and colunm cxperirrcnts. In batcl tcsrs. cornpost rs orore cffcclile than Z\rl to irxnobilizc nungaDese, wiih the maximum rirmo\,.1l of 23E.09 mnrol Mn. kg I of compo-* accorrling to l-angmuir equa{ion- High clfioieDcv of I\,ln re,roval onro conlpost is brobably nol onl) b_lr physical sorplion bur aiso by sur-ticc complexaiion \\,i1h carbo\ylic gr;ups in the corrrpost. Tlris rcsult \\,as confinred with FTIR data thri sho\u ne$. peaks at (,7i cmi alter conlacted witll nrangancsc solution. I\,langaoesc was also inmobilizcd lirough soqrlion onto ZVI due to high srLfacc area, a d parlly b), precipirarion rs miinganese oxidc because of intense alkalization. In columrl atedals_ aftcr introduciog mangancse solution lor l6 porc yolumes (p\J. lnaDsaocsc rvas prcdominanll], irnnrobilized in uppcr p.rlt of the coluuri. it is corlsidered rhal composl \\ias degradcd and rhc sufxce ofZVl gaDulcs was alrcadv unilblntcd and conosion producls xre thc nlost accumulatcd on Z\,1 E.rnuL." nerr ih( inlet hecJr"t ZvI |.1s bcen cortactc{] wiih high concentrations ollnanlllnese fbr the longesi timc in the ost botlorn pans. This \!as aiso suppci€d by XRir data liom ZVI grains that Dtatganese was Lhe larecsr in the mosl bottom segmenl. 1he results ofgeochcnrical calc0lrtiu|\ alon3 (irh rhe Sl:M ina!< suggc"r that pa ly ol maoganese $crc also prccipitared wifi cxrbonates. The result dcnxmsn.aics thal combi llliorr of conrpost and ZVI is more elicclivc 1() ielrovc nungancsc thnn using single marcrial duc to thc dillercnt nrecbanism olremoval lioDt cacil material.
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