With the launch of the Sentinel-1 mission, for the first time, multitemporal and dual-polarizatio... more With the launch of the Sentinel-1 mission, for the first time, multitemporal and dual-polarization C-band SAR data with a short revisit time is freely available. How can we use this data to generate accurate vegetation cover maps on a local scale? Our main objective was to assess the use of multitemporal C-Band Sentinel-1 data to generate wetland vegetation maps. We considered a portion of the Lower Delta of the Paraná River wetland (Argentina). Seventy-four images were acquired and 90 datasets were created with them, each one addressing a combination of seasons (spring, autumn, winter, summer, complete set), polarization (VV, HV, both), and texture measures (included or not). For each dataset, a Random Forest classifier was trained. Then, the kappa index values (κ) obtained by the 90 classifications made were compared. Considering the datasets formed by the intensity values, for the winter dates the achieved kappa index values (κ) were higher than 0.8, while all summer datasets ach...
The Paraguay-Paraná river system represents a unique, free-flowing corridor that extends about 35... more The Paraguay-Paraná river system represents a unique, free-flowing corridor that extends about 3500 km southwards from the Pantanal to the Rio de la Plata estuary, crossing four countries. The absence of fragmentation along the main channels and its still well-connected floodplains have preserved longitudinal and lateral functional and structural connectivity, defining critical ecological gradients for the biota and species life cycles. The lack of dams represents a noticeable feature that benefits migratory species supporting small-scale fisheries providing food security and the conservation of other ecosystem services with associated livelihoods. The ecological integrity of this corridor could be severely affected by the potential expansion of the Hidrovía Paraguay-Paraná for improving commercial trade, the foreseen installation of new dams in the Paraná basin, in addition to other current impacts and threats. Conservation of the corridor for societal benefits, involving the susta...
El termino humedal es reciente, como tambien el reconocimiento de que este tipo de ecosistema es ... more El termino humedal es reciente, como tambien el reconocimiento de que este tipo de ecosistema es diferente respecto de los terrestres y los acuaticos. Las definiciones actuales ponen en evidencia que son los aspectos funcionales derivados de la presencia del agua, y no los estructurales, los que brindan la base para comprender el concepto de humedal. Las definiciones tambien expresan la necesidad de un abordaje interdisciplinario y sistemico para su comprension y gestion. Los humedales representan apenas el 5-7% de la superficie terrestre, pero revisten gran importancia por la cantidad y la calidad de los bienes y servicios que proveen a la sociedad, los cuales estan estrechamente ligados al funcionamiento hidrologico. En la Argentina, los humedales ocupan mas del 21% del territorio, presentando una amplia variedad de tipos diferentes. El estado actual de transformacion y degradacion de los humedales de nuestro pais hace necesario avanzar en la comprension de su funcionamiento y en ...
ABSTRACT South America has a large proportion of wetlands compared with other continents. While m... more ABSTRACT South America has a large proportion of wetlands compared with other continents. While most of these wetlands were conserved in a relatively good condition until a few decades ago, pressures brought about by land use and climate change have threaten their integrity in recent years. The aim of this article is to provide a bibliometric analysis of the available scientific literature relating to the remote sensing of wetlands in South America. From 1960 to 2015, 153 articles were published in 63 different journals, with the number of articles published per year increasing progressively since 1990. This rise is also paralleled by an increase in the contribution of local authors. The most intensively studied regions are the wetland macrosystems of South American mega-rivers: the Amazon and Paraná Rivers, along with the Pantanal at the headwaters of Paraguay River. Few studies spanned more than two countries. The most frequent objectives were mapping, covering all types of wetlands with optical data, and hydrology, focusing on floodplain wetlands with microwave data as the preferred data source. The last decade substantial growth reflects an increase in technological and scientific capacities. Nevertheless, the state of the art regarding the remote sensing of wetlands in South America remains enigmatic. Fundamental questions and guidelines which may contribute to the understanding of the functioning of these ecosystems are yet to be fully defined and there is considerable dispersion in the use of data and remote-sensing approaches.
Most small-scale fisheries of large floodplain rivers are still managed under conventional top-do... more Most small-scale fisheries of large floodplain rivers are still managed under conventional top-down regulations that limit the application of an ecosystem approach to fisheries (EAF) due to inappropriate legal frameworks. Using the Parana–Paraguay River fisheries (Argentina) as an example, this study examines the extent to which existing provincial legislations can be prepared for the adoption of an EAF. An Ecosystem Fishing Legal Approach (EFLA) framework is proposed based on different criteria across an environmental–ecological, fishing, social, economic and institutional template. Policy Component Scores (PCS) and an Integrated Policy Legal Index (IPLI) were applied to assess the degree of compliance by current provincial legislations to EAF implementation. Cluster analysis was used to recognise the potential for articulating a legal framework at a basin scale. The EFLA framework, which provided an accurate picture of how provinces were poorly prepared to adopt an EAF for the Paraguay–Parana fisheries, and represents a suitable tool that can be adapted and extended to other basins around the world.
This note presents the first records of Astyanax pelegrini Eigenmann, 1907 and Triportheus pantan... more This note presents the first records of Astyanax pelegrini Eigenmann, 1907 and Triportheus pantanensis Malabarba, 2004 for the province of Formosa, Argentina from fish surveys conducted in the Río Pilcomayo National Park and Ramsar Site. In the case of T. pantanensis, this occurrence represents the first record of this species for Argentina.
Habitat loss is one of the main factors reducing wildlife diversity and restricting its conservat... more Habitat loss is one of the main factors reducing wildlife diversity and restricting its conservation. Habitat suitability models are important tools for wildlife management and conservation in order to evaluate the impacts of human activities on wildlife habitats. The capybara ( Hydrochoerus hydrochaeris) is a semi-aquatic rodent that lives in South American wetlands that are subject to heavy human use. A spatially explicit model of capybara's Potential Habitat Suitability (PHS) was developed for the core area of its distribution in the humid subtropical region of Argentina. Predictive variables in this deductive model were related to capybara habitat requirements, and their values were obtained from existing published papers. The PHS model was performed using two data subsets that evaluated both ecological requirements and anthropogenic threats, resulting in two partial indices: Potential Ecological Suitability (PES), and Risk of Human Impact (RHI). The PES assesses vegetation ...
Abstract This work assesses the performance of a 2000–2014 NDVI-MODIS time-series to identify are... more Abstract This work assesses the performance of a 2000–2014 NDVI-MODIS time-series to identify areas of the Parana River floodplain associated with different morphodynamic areas and hence ecological behavior. From classification procedures we obtained six NDVI patterns (P1 to P6) differing in their mean values, standard deviation, and seasonality. The NDVI patterns are evidence of different situations in terms of elevation, flood dynamics, and vegetation physiognomies: P1 represents water bodies, P2 to P4 cover frequently flooded lowlands colonized by marshy vegetation, and P5 and P6 are placed on middle and high elevations that are less flooded and also are covered by tall vegetation (grassland and forest). Instead of differences among the six NDVI patterns, they showed a spatial arrangement that allowed the identification of two parallel belts; belt I, formed by P2 to P4, is placed close to the Parana River and its connected branches; while belt II, formed by P5 and mainly P6, appears on the marginal floodplain far away from the main channels. The spatial arrangement of the two belts is similar to limits followed by the morphodynamic areas of the Parana fluvial system. More than 60% of the surface covered by P2 and P5 corresponds to low morphodynamic areas while nearly 70% of P6 matches with high morphodynamic areas. Through their annual and interannual behavior, spatial arrangement, and relationship with morphodynamic areas, the NDVI patterns allow the interpretation of lateral organization of the Parana River floodplain. This paper exploits the potential of time-series of NDVI to understand, from a synoptic point of view, the floodplain dynamics by capturing the seasonal and interannual variability of vegetation physiognomies and hydrosedimentological regime along and across the floodplain.
The Route 28 Dam has the potential to block fish movements from La Estrella marsh to the Pilcomay... more The Route 28 Dam has the potential to block fish movements from La Estrella marsh to the Pilcomayo River. In addition, the many fish that concentrate immediately downstream of the dam may suffer high mortality when they are stranded during low water periods. The goals of this study are to determine if fish are able to pass the spillway and to assess if the design of the installed ladders (pool and weir type) effectively supports upstream migration of Prochilodus lineatus (sábalo). Results showed that only fish longer than 39 cm should be able to ascend the spillway chute, but when water levels on the spillway crest are over 0.4 m. Fish are also unable to jump from spillway toe to spillway crest because the downstream dissipation pool does not meet the minimum depth criterion for fish to accelerate to sufficient velocity. Fish ladders have insufficient number of pools and some pool dimensions and designs depart from accepted standard designs. Volumetric dissipation power in the upper...
This study assesses the change in fish exploitation patterns of the sábalo fisheries of the lower... more This study assesses the change in fish exploitation patterns of the sábalo fisheries of the lower Paraná River basin based on hydrological, biological, and fishery indicators. From historical catch records, we recorded a shift from a lightly and moderate exploited status before 2001 to a heavily exploited one, as a result of the development of sábalo exports from 2001 onwards. Channel and floodplain connectivity indices demonstrated that the Paraná exhibited highly favorable hydrological conditions between 1972 and 1999 but more adverse conditions from 1999 to 2009, as a consequence of flood pulses reduction coincident with a fishing mortality increment. A total catch of 15,000 tons, including local consumption, regional market, informal sales, and exportation volumes, was estimated as the maximum sustainable catch. That level was instead exceeded 3 fold in 2004, in parallel with a decrease in the mean fish length from 48 to 42 cm, along with a reduction in both the mesh size from 1...
South American large-river fisheries are experiencing a growing pressure due to mining activity, ... more South American large-river fisheries are experiencing a growing pressure due to mining activity, construction of dams, water diversion, dredging, commercial overfishing, pollution, floodplain deterioration, agriculture, and development. Despite the fact that artisanal fisheries represent a valuable resource for many riverine communities and play a critical role in assuring food security and poverty alleviation, managers are challenged to develop sound governance processes that ensure the sustainability of resources and fishing communities. The lack of effective governanceprocesses in artisanal fluvial fisheries is rooted in several social, economic, institutional, and ecological/environmental constraints. Most large-river fisheries are managed under a conventional approach, applying centralized government control policies that minimize stakeholders? participation in management decision making. River-fisheries governance is dependent on institutions, policies, and economic and political scenarios that are outside the fishery sector. Market demands and constructionof dams and river fragmentation, mining, pollution, cattle agriculture, deforestation, and recreational fishing pressure are all factors that have the potential to alter fisheries sustainability. Governance mechanisms in South American large rivers can be developed at three levels but need to prioritize economic growth, food security, employment, equitable access to resources, and poverty alleviation and promote and integrate the sustainable use of fluvial resources through stakeholders´ involvement in decision-making processes. To achieve such goals, new institutional and legal arrangements should be promoted envisioning small-scale fisheries as ecosystem services and implementing an ecosystem-based approach that integrates ecological and human components to support better governance processes.Fil: Baigún, Claudio Rafael M.. Universidad Nacional de San Martín. Instituto de Investigación e Ingeniería Ambiental. Laboratorio de Ecología, Teledetección y Ecoinformática; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Castillo, Trilce Irupé. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Investigaciones Socio-Históricas Regionales. Centro de Estudios Sociales Regionales - Nodo Cesor - Ishir; ArgentinaFil: Minotti, Priscilla Gail. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Martín. Instituto de Investigación e Ingeniería Ambiental. Laboratorio de Ecología, Teledetección y Ecoinformática; Argentin
ABSTRACT RESUMEN Las inundaciones constituyen uno de los procesos hidrológicos de mayor peligro p... more ABSTRACT RESUMEN Las inundaciones constituyen uno de los procesos hidrológicos de mayor peligro para las actividades humanas ubicadas sobre los valles y orillas de ríos, lagos, lagunas y otros cuerpos de agua. El monitoreo y cuantificación de inundaciones durante las tres etapas del evento -antes, durante y después -constituyen una herramienta imprescindible para mitigar los impactos sobre el ambiente y las actividades humanas. La utilización de información satelital para el estudio de episodios multitemporales es mundialmente reconocida. Diversos trabajos realizados durante los últimos años han demostrado que la combinación de técnicas relacionadas a los Sistemas de Información Geográfica (SIG) con la información procedente de imágenes satelitarias de sensores activos y/o pasivos, resulta ser la metodología que mejor solución ofrece en este campo, tanto en términos de rapidez como de calidad de resultados (Giraut, 1992). La incorporación de imágenes procedentes de los sensores instalados en el satélite SAC-C 1 , como una nueva herramienta de detección y evaluación, se convertirá en una fuente de datos de gran valor para el monitoreo, evaluación y mapeo de inundaciones en diversas zonas del territorio argentino.
With the launch of the Sentinel-1 mission, for the first time, multitemporal and dual-polarizatio... more With the launch of the Sentinel-1 mission, for the first time, multitemporal and dual-polarization C-band SAR data with a short revisit time is freely available. How can we use this data to generate accurate vegetation cover maps on a local scale? Our main objective was to assess the use of multitemporal C-Band Sentinel-1 data to generate wetland vegetation maps. We considered a portion of the Lower Delta of the Paraná River wetland (Argentina). Seventy-four images were acquired and 90 datasets were created with them, each one addressing a combination of seasons (spring, autumn, winter, summer, complete set), polarization (VV, HV, both), and texture measures (included or not). For each dataset, a Random Forest classifier was trained. Then, the kappa index values (κ) obtained by the 90 classifications made were compared. Considering the datasets formed by the intensity values, for the winter dates the achieved kappa index values (κ) were higher than 0.8, while all summer datasets ach...
The Paraguay-Paraná river system represents a unique, free-flowing corridor that extends about 35... more The Paraguay-Paraná river system represents a unique, free-flowing corridor that extends about 3500 km southwards from the Pantanal to the Rio de la Plata estuary, crossing four countries. The absence of fragmentation along the main channels and its still well-connected floodplains have preserved longitudinal and lateral functional and structural connectivity, defining critical ecological gradients for the biota and species life cycles. The lack of dams represents a noticeable feature that benefits migratory species supporting small-scale fisheries providing food security and the conservation of other ecosystem services with associated livelihoods. The ecological integrity of this corridor could be severely affected by the potential expansion of the Hidrovía Paraguay-Paraná for improving commercial trade, the foreseen installation of new dams in the Paraná basin, in addition to other current impacts and threats. Conservation of the corridor for societal benefits, involving the susta...
El termino humedal es reciente, como tambien el reconocimiento de que este tipo de ecosistema es ... more El termino humedal es reciente, como tambien el reconocimiento de que este tipo de ecosistema es diferente respecto de los terrestres y los acuaticos. Las definiciones actuales ponen en evidencia que son los aspectos funcionales derivados de la presencia del agua, y no los estructurales, los que brindan la base para comprender el concepto de humedal. Las definiciones tambien expresan la necesidad de un abordaje interdisciplinario y sistemico para su comprension y gestion. Los humedales representan apenas el 5-7% de la superficie terrestre, pero revisten gran importancia por la cantidad y la calidad de los bienes y servicios que proveen a la sociedad, los cuales estan estrechamente ligados al funcionamiento hidrologico. En la Argentina, los humedales ocupan mas del 21% del territorio, presentando una amplia variedad de tipos diferentes. El estado actual de transformacion y degradacion de los humedales de nuestro pais hace necesario avanzar en la comprension de su funcionamiento y en ...
ABSTRACT South America has a large proportion of wetlands compared with other continents. While m... more ABSTRACT South America has a large proportion of wetlands compared with other continents. While most of these wetlands were conserved in a relatively good condition until a few decades ago, pressures brought about by land use and climate change have threaten their integrity in recent years. The aim of this article is to provide a bibliometric analysis of the available scientific literature relating to the remote sensing of wetlands in South America. From 1960 to 2015, 153 articles were published in 63 different journals, with the number of articles published per year increasing progressively since 1990. This rise is also paralleled by an increase in the contribution of local authors. The most intensively studied regions are the wetland macrosystems of South American mega-rivers: the Amazon and Paraná Rivers, along with the Pantanal at the headwaters of Paraguay River. Few studies spanned more than two countries. The most frequent objectives were mapping, covering all types of wetlands with optical data, and hydrology, focusing on floodplain wetlands with microwave data as the preferred data source. The last decade substantial growth reflects an increase in technological and scientific capacities. Nevertheless, the state of the art regarding the remote sensing of wetlands in South America remains enigmatic. Fundamental questions and guidelines which may contribute to the understanding of the functioning of these ecosystems are yet to be fully defined and there is considerable dispersion in the use of data and remote-sensing approaches.
Most small-scale fisheries of large floodplain rivers are still managed under conventional top-do... more Most small-scale fisheries of large floodplain rivers are still managed under conventional top-down regulations that limit the application of an ecosystem approach to fisheries (EAF) due to inappropriate legal frameworks. Using the Parana–Paraguay River fisheries (Argentina) as an example, this study examines the extent to which existing provincial legislations can be prepared for the adoption of an EAF. An Ecosystem Fishing Legal Approach (EFLA) framework is proposed based on different criteria across an environmental–ecological, fishing, social, economic and institutional template. Policy Component Scores (PCS) and an Integrated Policy Legal Index (IPLI) were applied to assess the degree of compliance by current provincial legislations to EAF implementation. Cluster analysis was used to recognise the potential for articulating a legal framework at a basin scale. The EFLA framework, which provided an accurate picture of how provinces were poorly prepared to adopt an EAF for the Paraguay–Parana fisheries, and represents a suitable tool that can be adapted and extended to other basins around the world.
This note presents the first records of Astyanax pelegrini Eigenmann, 1907 and Triportheus pantan... more This note presents the first records of Astyanax pelegrini Eigenmann, 1907 and Triportheus pantanensis Malabarba, 2004 for the province of Formosa, Argentina from fish surveys conducted in the Río Pilcomayo National Park and Ramsar Site. In the case of T. pantanensis, this occurrence represents the first record of this species for Argentina.
Habitat loss is one of the main factors reducing wildlife diversity and restricting its conservat... more Habitat loss is one of the main factors reducing wildlife diversity and restricting its conservation. Habitat suitability models are important tools for wildlife management and conservation in order to evaluate the impacts of human activities on wildlife habitats. The capybara ( Hydrochoerus hydrochaeris) is a semi-aquatic rodent that lives in South American wetlands that are subject to heavy human use. A spatially explicit model of capybara's Potential Habitat Suitability (PHS) was developed for the core area of its distribution in the humid subtropical region of Argentina. Predictive variables in this deductive model were related to capybara habitat requirements, and their values were obtained from existing published papers. The PHS model was performed using two data subsets that evaluated both ecological requirements and anthropogenic threats, resulting in two partial indices: Potential Ecological Suitability (PES), and Risk of Human Impact (RHI). The PES assesses vegetation ...
Abstract This work assesses the performance of a 2000–2014 NDVI-MODIS time-series to identify are... more Abstract This work assesses the performance of a 2000–2014 NDVI-MODIS time-series to identify areas of the Parana River floodplain associated with different morphodynamic areas and hence ecological behavior. From classification procedures we obtained six NDVI patterns (P1 to P6) differing in their mean values, standard deviation, and seasonality. The NDVI patterns are evidence of different situations in terms of elevation, flood dynamics, and vegetation physiognomies: P1 represents water bodies, P2 to P4 cover frequently flooded lowlands colonized by marshy vegetation, and P5 and P6 are placed on middle and high elevations that are less flooded and also are covered by tall vegetation (grassland and forest). Instead of differences among the six NDVI patterns, they showed a spatial arrangement that allowed the identification of two parallel belts; belt I, formed by P2 to P4, is placed close to the Parana River and its connected branches; while belt II, formed by P5 and mainly P6, appears on the marginal floodplain far away from the main channels. The spatial arrangement of the two belts is similar to limits followed by the morphodynamic areas of the Parana fluvial system. More than 60% of the surface covered by P2 and P5 corresponds to low morphodynamic areas while nearly 70% of P6 matches with high morphodynamic areas. Through their annual and interannual behavior, spatial arrangement, and relationship with morphodynamic areas, the NDVI patterns allow the interpretation of lateral organization of the Parana River floodplain. This paper exploits the potential of time-series of NDVI to understand, from a synoptic point of view, the floodplain dynamics by capturing the seasonal and interannual variability of vegetation physiognomies and hydrosedimentological regime along and across the floodplain.
The Route 28 Dam has the potential to block fish movements from La Estrella marsh to the Pilcomay... more The Route 28 Dam has the potential to block fish movements from La Estrella marsh to the Pilcomayo River. In addition, the many fish that concentrate immediately downstream of the dam may suffer high mortality when they are stranded during low water periods. The goals of this study are to determine if fish are able to pass the spillway and to assess if the design of the installed ladders (pool and weir type) effectively supports upstream migration of Prochilodus lineatus (sábalo). Results showed that only fish longer than 39 cm should be able to ascend the spillway chute, but when water levels on the spillway crest are over 0.4 m. Fish are also unable to jump from spillway toe to spillway crest because the downstream dissipation pool does not meet the minimum depth criterion for fish to accelerate to sufficient velocity. Fish ladders have insufficient number of pools and some pool dimensions and designs depart from accepted standard designs. Volumetric dissipation power in the upper...
This study assesses the change in fish exploitation patterns of the sábalo fisheries of the lower... more This study assesses the change in fish exploitation patterns of the sábalo fisheries of the lower Paraná River basin based on hydrological, biological, and fishery indicators. From historical catch records, we recorded a shift from a lightly and moderate exploited status before 2001 to a heavily exploited one, as a result of the development of sábalo exports from 2001 onwards. Channel and floodplain connectivity indices demonstrated that the Paraná exhibited highly favorable hydrological conditions between 1972 and 1999 but more adverse conditions from 1999 to 2009, as a consequence of flood pulses reduction coincident with a fishing mortality increment. A total catch of 15,000 tons, including local consumption, regional market, informal sales, and exportation volumes, was estimated as the maximum sustainable catch. That level was instead exceeded 3 fold in 2004, in parallel with a decrease in the mean fish length from 48 to 42 cm, along with a reduction in both the mesh size from 1...
South American large-river fisheries are experiencing a growing pressure due to mining activity, ... more South American large-river fisheries are experiencing a growing pressure due to mining activity, construction of dams, water diversion, dredging, commercial overfishing, pollution, floodplain deterioration, agriculture, and development. Despite the fact that artisanal fisheries represent a valuable resource for many riverine communities and play a critical role in assuring food security and poverty alleviation, managers are challenged to develop sound governance processes that ensure the sustainability of resources and fishing communities. The lack of effective governanceprocesses in artisanal fluvial fisheries is rooted in several social, economic, institutional, and ecological/environmental constraints. Most large-river fisheries are managed under a conventional approach, applying centralized government control policies that minimize stakeholders? participation in management decision making. River-fisheries governance is dependent on institutions, policies, and economic and political scenarios that are outside the fishery sector. Market demands and constructionof dams and river fragmentation, mining, pollution, cattle agriculture, deforestation, and recreational fishing pressure are all factors that have the potential to alter fisheries sustainability. Governance mechanisms in South American large rivers can be developed at three levels but need to prioritize economic growth, food security, employment, equitable access to resources, and poverty alleviation and promote and integrate the sustainable use of fluvial resources through stakeholders´ involvement in decision-making processes. To achieve such goals, new institutional and legal arrangements should be promoted envisioning small-scale fisheries as ecosystem services and implementing an ecosystem-based approach that integrates ecological and human components to support better governance processes.Fil: Baigún, Claudio Rafael M.. Universidad Nacional de San Martín. Instituto de Investigación e Ingeniería Ambiental. Laboratorio de Ecología, Teledetección y Ecoinformática; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Castillo, Trilce Irupé. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Investigaciones Socio-Históricas Regionales. Centro de Estudios Sociales Regionales - Nodo Cesor - Ishir; ArgentinaFil: Minotti, Priscilla Gail. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Martín. Instituto de Investigación e Ingeniería Ambiental. Laboratorio de Ecología, Teledetección y Ecoinformática; Argentin
ABSTRACT RESUMEN Las inundaciones constituyen uno de los procesos hidrológicos de mayor peligro p... more ABSTRACT RESUMEN Las inundaciones constituyen uno de los procesos hidrológicos de mayor peligro para las actividades humanas ubicadas sobre los valles y orillas de ríos, lagos, lagunas y otros cuerpos de agua. El monitoreo y cuantificación de inundaciones durante las tres etapas del evento -antes, durante y después -constituyen una herramienta imprescindible para mitigar los impactos sobre el ambiente y las actividades humanas. La utilización de información satelital para el estudio de episodios multitemporales es mundialmente reconocida. Diversos trabajos realizados durante los últimos años han demostrado que la combinación de técnicas relacionadas a los Sistemas de Información Geográfica (SIG) con la información procedente de imágenes satelitarias de sensores activos y/o pasivos, resulta ser la metodología que mejor solución ofrece en este campo, tanto en términos de rapidez como de calidad de resultados (Giraut, 1992). La incorporación de imágenes procedentes de los sensores instalados en el satélite SAC-C 1 , como una nueva herramienta de detección y evaluación, se convertirá en una fuente de datos de gran valor para el monitoreo, evaluación y mapeo de inundaciones en diversas zonas del territorio argentino.
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