Metadata Catalogue
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This layer shows 41 watersheds across the country.
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Digital polygon dataset of Major River Basins of Afghanistan. This dataset is created using 1:1,000,000 scale map of Afghanistan and derived from AIMS, Afghanistan.
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Digital polygon dataset of rainfall erosivity factor (R) of Koshi basin. The dataset is created using rainstorms of Nepal, India and China from world climate precipitation data. R-factor is computed as the average annual sum of the erosivity of the individual rainstorms, which is calculated as the product of total storm energy and maximum 30-min intensity. R-factor was evaluated from world climate precipitation data with equation (Renard and Freimund, 1994): R = 0.0483*P1.610 where P= annual precipitation (mm).
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Accelerated soil erosion is a common and environmentally destructive consequence of development in the populated trans-boundary Koshi river basin. The objective of this study was to assess assessment of soil erosion pattern and dynamic change trend of spatial distribution in erosion status between 1990 and 2010 and obtained the conservation priority map in the Koshi basin area using GIS and remote sensing. To develop soil erosion pattern revised universal soil loss equation (RUSLE) were adopted in ArcGIS environment where is the rainfall erosivity, soil erodibility, slope length factor, crop management factor and support practice factors were used a primary parameters. This study result the annual total erosion 4,35,996 ton/ha/yr in 2010.
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Digital polygon dataset of River Basins of Pakistan. This dataset is Basic Vector layer derived from ESRI Map & Data 2001.
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Digital polygon dataset of Watershed boundaries of Bhutan. This dataset is extracted using the SRTM DEM. The boundaries were refined using LandSat images of 30m resolution. The watershed boundary was further divided into sub-watershed boundaries particularly in the glaciated region.
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Digital polygon dataset of Watersheds of Afghanistan. This dataset is basic vector layer acquired from ESRI Data and Maps 2001.
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This Layer shows five major water basins (Norther Basin, Hari Rod-Lower, South Eastern Basin, Northern Basin, Helmand Basin and Nondranage areas in Southern part of Afghanistan.
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Watershed was developed from SRTM using ArcGIS tool.
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High levels of water-induced erosion in the transboundary Himalayan river basins are contributing to substantial changes in basin hydrology and inundation. Basin-wide information on erosion dynamics is needed for conservation planning, but field-based studies are limited. This study used remote sensing (RS) data and a geographic information system (GIS) to estimate the spatial distribution of soil erosion across the entire Koshi basin. The revised universal soil loss equation (RUSLE) was used in an ArcGIS environment with rainfall erosivity, soil erodibility, slope length and steepness, cover-management, and support practice factors as primary parameters. The estimated annual erosion from the basin was around 42 million tonnes.