Abstract
Human-induced agricultural and developmental activities cause substantial alteration to the natural geography of a landscape; thereby accelerates the geologic soil erosion process. This necessitates quantification of catchment-scale soil erosion under both retrospective and future scenarios for efficient conservation of soil resources. Here, we present a revised universal soil loss equation (RUSLE) based soil erosion estimation framework at an unprecedentedly high spatial resolution (30 × 30 m) to quantify the average annual soil loss and sediment yield from an agriculture-dominated river basin. The input parameters were derived by using the observed rainfall data, soil characteristics (soil texture, hydraulic conductivity, organic matter content), and topographic characteristics (slope length and percent slope) derived from digital elevation model (DEM) and satellite imageries. The developed approach was evaluated in the Brahmani River basin (BRB) of eastern India, wherein the different RUSLE inputs, viz., rainfall erosivity (R factor), soil erodibility (K factor), topographic (LS factor), crop cover (C factor), and management practice (P factor) factors have the magnitude of 1937 to 4867 MJ mm ha−1 h−1 year−1, 0.023 to 0.039 t h ha MJ−1 ha−1 mm−1, 0.03 to 74, 0.16 to 1, and 0 to 1, respectively. The estimated average annual soil loss over the BRB ranged from 0 to 319.55 t ha−1 year−1, and subsequent erosion categorization revealed that 54.2% of basin area comes under extreme soil erosion zones in the baseline period. Similarly, the sediment yield estimates varied in the range of 0.96 to 133.31 t ha−1 year−1, and 35.81% area were identified as high soil erosion potential zones. The extent of erosion under climate change scenario was assessed using the outputs of HadGEM2-ES climate model for the future time scales of 2030, 2050, 2070, and 2080 under the four representative concentration pathways (RCPs) 2.6, 4.5, 6.0, and 8.5. The severity of soil erosion under climate change is expected to have a mixed impact in the range of −25 to 25% than the baseline scenario. The outcomes of this study will serve as a valuable tool for decision-makers while implementing management policies over the BRB, and can be well extended to any global catchment-scale applications.
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Abbreviations
- ArcGIS:
-
Aeronautical Reconnaissance Coverage Geographic Information System
- ASTER:
-
Advanced spaceborne thermal emission and reflection radiometer
- BMPs:
-
Best management practices
- BRB:
-
Brahmani River basin
- C-factor:
-
Crop cover factor
- DEM:
-
Digital elevation model
- e.g.:
-
Exempli gratia
- et al.:
-
And others
- GCM:
-
General circulation model
- GIS:
-
Geographical information system
- HadGEM2-ES:
-
Hadley Center Global Environmental Model, version 2 (Earth System)
- i.e.:
-
that is
- ICAR:
-
Indian Council of Agricultural Research
- IDW:
-
Inverse distance weighting
- IISWC:
-
Indian Institute of Soil and Water Conservation
- IMD:
-
India Meteorological Department
- IPCC:
-
Intergovernmental panel on climate change
- K-factor:
-
Soil erodibility factor
- LS-factor:
-
Topographic factor
- LULC:
-
Land use land cover
- MSL:
-
Mean sea level
- MUSLE:
-
Modified universal soil loss equation
- NBSS&LUP:
-
National Bureau of Soil Survey and Land Use Planning
- NDVI:
-
Normalized difference vegetation index
- NICRA:
-
National innovations on climate resilient agriculture
- NRSC:
-
National remote sensing Centre
- OLI:
-
Operational land imager
- P factor:
-
Management practice factor
- RCM:
-
Regional climate model
- RCPs:
-
Representative concentration pathways
- R factor:
-
Rainfall erosivity factor
- RUSLE:
-
Revised universal soil loss equation
- SCS:
-
Soil conservation service
- SDR:
-
Sediment delivery ratio
- TM:
-
Thematic mapper
- USA:
-
United States of America
- USDA:
-
United States Department of Agriculture
- USGS:
-
United States Geological Survey
- USLE:
-
Universal soil loss equation
- viz:
-
Namely
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Acknowledgments
The authors are thankful to the NICRA project at ICAR-IISWC Dehradun for partially funding the present research. Thanks are extended to Ms. Monika Rawat for assisting in the future climate data preparation. The fellowship received by the first author from the TEQIP program is duly acknowledged.
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Behera, M., Sena, D.R., Mandal, U. et al. Integrated GIS-based RUSLE approach for quantification of potential soil erosion under future climate change scenarios. Environ Monit Assess 192, 733 (2020). https://doi.org/10.1007/s10661-020-08688-2
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DOI: https://doi.org/10.1007/s10661-020-08688-2