Filters: partyWithName: Earth Resources Observation and Science (EROS) Center (X) > partyWithName: Naga Manohar Velpuri (X)

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Rainfed and Irrigated Cropland Areas for Africa Agriculture consumes the largest share of freshwater globally, therefore, distinguishing between rainfed and irrigated croplands is essential for agricultural water management and food security. Yet in Africa, disaggregating croplands is challenging due to the continent's vast size, diverse climates, and varied agricultural practices. In this study, a framework using the Budyko model was applied to differentiate between rainfed and irrigated cropland areas in Africa for eight remote sensing landcover products and a high confidence cropland map (HCCM). The approach outlined in this research expands on the suite of remote sensing landcover products that can be used for agricultural water studies in Africa by enabling... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Africa, Hydrology, Land Use Change, USGS Science Data Catalog (SDC), Water Resources, All tags... geoscientificInformation, inlandWaters, irrigation, land use and land cover, water use, Fewer tags Assessing the impact of irrigation curtailment using Landsat satellite data: A case study in the Upper Klamath Lake basin The associated geotiff rasters represents the total actual evapotranspiration (ETa) from June through September for the years 2004, 2006, 2008-2010, and 2013-2016 for the entire Klamath Basin in southern Oregon. The ETa was created using Landsat imagery and the Operational Simplified Surface Energy Balance (SSEBop) model to estimate actual ET and the Python scripts to complete that process is also provided. Additionally, the June-September average (mean) ETa for the "base years" of 2004, 2006, 2008-2010 and ETa Anomaly (deviation from the base years average mean) for each year between 2013-2016 is provided. Text files of SSEBop daily actual ET along with actual ET from Ameriflux eddy co-variance flux tower sites... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Land Use Change, USGS Science Data Catalog (SDC), Upper Klamath Lake, environment, geoscientificInformation, All tags... irrigation, water use, Fewer tags Hydrologic gridded runoff and routed discharge data for Africa from 2000-2021 This dataset, VegDischarge v1, represents a significant contribution to the understanding of hydrological dynamics across Africa from 2000 to 2021. It encompasses high-resolution (1km x 1km) monthly raster data of deep drainage, surface runoff, and total runoff, derived from the VegET (VegetationEvapoTranspiration) hydrological model (Senay et al., 2023). Additionally, routed discharge data (Mizukami et al., 2021) for over 63,000 river segments is provided, employing different routing algorithms (DW, KW, KWT, MC, and IRF) to demonstrate variability in river discharge patterns. This comprehensive dataset is stored in NetCDF and Shapefile formats, offering valuable insights for policymakers, stakeholders, and researchers... Categories: Data; Types: Data, Downloadable, Map Service, NetCDF OPeNDAP Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service, Shapefile; Tags: Africa, Hydrology, Land Use Change, Remote Sensing, USGS Science Data Catalog (SDC), All tags... VegET model, VegHydro Model, deep drainage, discharge, geoscientificInformation, inlandWaters, raster data, routed discharge data, runoff, surface runoff, Fewer tags Assembly of satellite-based rainfall datasets in situ data and rainfall climatology contours for the MENA region Information on the spatio-temporal distribution of rainfall is very critical for addressing water related disasters, especially in the arid to semi-arid regions of the Middle East and North Africa region. However, availability of reliable rainfall datasets for the region is limited. In this study we combined observation from satellite-based rainfall data, in situ rain gauge observation and rainfall climatology to create a reliable regional rainfall dataset for Jordan, West Bank and Lebanon. First, we validated three satellite-based rainfall products using rain gauge observations obtained from Jordan (205 stations), Palestine (44 stations) and Lebanon (8 stations). We used the daily 25-km Tropical Rainfall Measuring... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: CHIRPS, Jordan, Land Use Change, Lebanon, MENA, All tags... MSWEP, Palestine, RFE, TRMM, USGS Science Data Catalog (SDC), gauge-station measurements, precipitation, rainfall climatology contours, remote sensing, Fewer tags Satellite-based Water Use Dynamics Using Historical Landsat Data (1984-2014) in the Southwestern United States Historical (1984-2014) Landsat-based ET maps were generated for Palo Verde Irrigation District (PVID) and eight other sub-basins in parts of Middle and Lower Central Valley, California. A total of 3,396 Landsat images were processed using the Operational Simplified Surface Energy balance (SSEBop) model that integrates weather and remotely sensed images to estimate monthly and annual ET within the study areas over the 31 years. Model output evaluation and validation using gridded-flux data and water balance ET approaches indicated relatively strong association between SSEBop ET and validation datasets. Historical trend analysis of seven agro-hydrologic variables were done using the Seasonal Mann-Kendall test. Types: Citation; Tags: PVID; SSEBop; evapotranspiration; historical ET, USGS Science Data Catalog (SDC), climatologyMeteorologyAtmosphere, environment, farming, All tags... geoscientificInformation, imageryBaseMapsEarthCover, location, Fewer tags Long-term (1986–2015) Crop Water Use Characterization over the Upper Rio Grande Basin using Landsat-based Evapotranspiration Evaluation of historical water use in the Upper Rio Grande Basin (URGB) using Landsat-derived actual evapotranspiration (ETa) from 1986 to 2015 is presented here as a first of its kind study applying satellite observations for quantifying long term, basin-wide crop consumptive use at a large basin. The rich archive of Landsat imagery combined with the Operational Simplified Surface Energy Balance (SSEBop) model was used to estimate and map ETa across the basin and over irrigated fields for historical characterization of water use dynamics. Monthly ETa estimates were evaluated using six eddy covariance (EC) flux towers showing strong correspondence (R2 > 0.80), with reasonable error rates (root mean square error... Tags: Evapotranspiration, Land Use Change, Landsat, Remote Sensing, Remote Sensing, All tags... SSEBop ET, USGS Science Data Catalog (SDC), Upper Rio Grande Basin, Upper Rio Grande Basin, Water Resources, consumptive water use, Fewer tags Bias estimation for seven precipitation datasets for the eastern MENA region Information on the spatio-temporal distribution of rainfall is critical for addressing water-related disasters, especially in the Middle East and North Africa's (MENA) arid to semi-arid regions. However, the availability of reliable rainfall datasets for most river basins is limited. In this study, we utilized observations from satellite-based rainfall data, in situ rain gauge observations, and rainfall climatology to determine the most suitable precipitation dataset in the MENA region. First, we evaluated seven different rainfall products (CPC, GPCC, TRMM, PERSIANN, RFE, CHIRPS, MSWEP) using rain gauge observations obtained from Jordan (139 stations), Palestine (9 stations), and Lebanon (16 stations). The validation... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Jordan, Lebanon, MENA, USGS Science Data Catalog (SDC), bias estimation, All tags... evaluation, none, precipitation, Fewer tags