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Assessment of Erosion Risk with the Rusle and Gis in the Middle and Lower Reaches of Hanjiang River
| Content Provider | Semantic Scholar |
|---|---|
| Copyright Year | 2002 |
| Abstract | Soil erosion in Hanjing River basin has occurred at an alarming rate. Mapping erosion risk in this region is increasingly needed by environment agencies. A research has, therefore, been carried out to evaluate the soil erosion risk at the middle and lower reaches of Hanjiang River. This research integrates the Revised Universal Soil Loss Equation (RUSLE) with a Geographic Information System (GIS) to quantify erosion risk. Soil data, land use inventory, digital elevation data, and climatic atlases were used as resource data sets to generate RUSLE factor values. Data sets for the RUSLE factors, along with associated maps showing geographic distributions, were established on IDRISI geographic information system (GIS). IDRISI was used to interactively calculate soil loss and map erosion risk. About 31 percent of the study area was predicted to have moderate risk of erosion and its annual soil loss is about10t/ha ~30t/ha; about 5.7% of the study area is extreme risk of erosion, which annual soil loss is more than 80t/ha. The extreme erosion areas are mainly slopelands and downlands in the middle reaches. It is, therefore, necessary to prescribe appropriate soil and water conservation practices to control the volume of soil loss within acceptable limits. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://tucson.ars.ag.gov/isco/isco12/volumeiv/assessmentoferosionrisk.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
