Landuse changes simulation for erosion control in the Asahan Hulu Sub Watershed
| Autor: | D L S Nasution, S Pasaribu |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | IOP Conference Series: Earth and Environmental Science. 782:022070 |
| ISSN: | 1755-1315 1755-1307 |
| DOI: | 10.1088/1755-1315/782/2/022070 |
| Popis: | Landuse changes that don’t follow the principles of land conservation are susceptible to erosion, sedimentation, and flooding. This study aims to determine the most optimal land use scenario in order to reduce the rate of erosion and analyse the effect of land use change on erosion. This research was conducted by collecting rainfall data, soil type maps, slope maps, and land use maps then overlaid using arc GIS and then calculating the erosion value. The simulation is done by reducing production land cover index and increasing forest landcover index. The results showed that the annual erosion value in existing condition was 111.67 tonnes / ha / year which is moderate erosion hazard class. The amount of increasing forest land cover area in scenario I is about 2881.80 ha, scenario II is about 5266.95 ha, and scenario III is about 7652.12 ha. The reduced erosion in each scenario of landuse change is 103.489 tonnes/ ha / year, in scenario 1, 93.642 tonnes / ha / year at scenario II, and 87.358 tonnes / ha / yr at scenario III. |
| Databáze: | OpenAIRE |
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