Land Use and Land Cover Changes and Its Impact on Soil Erosion in Stung Sangkae Catchment of Cambodia
| Autor: | Bunthan Ngo, Jaehak Jeong, Machito Mihara, P. V. Vara Prasad, Nareth Nut, Gilbert Sigua, Manny R. Reyes |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Hydrology
soil erosion Environmental effects of industries and plants Land use Renewable Energy Sustainability and the Environment Geography Planning and Development Stormwater TJ807-830 Land cover Management Monitoring Policy and Law TD194-195 GIS Renewable energy sources Environmental sciences Universal Soil Loss Equation Erosion Paddy field Environmental science GE1-350 RUSLE Stung Sangkae catchment Soil conservation Surface runoff LULC Cambodia |
| Zdroj: | Sustainability Volume 13 Issue 16 Sustainability, Vol 13, Iss 9276, p 9276 (2021) |
| ISSN: | 2071-1050 |
| DOI: | 10.3390/su13169276 |
| Popis: | Agricultural expansion and urban development without proper soil erosion control measures have become major environmental problems in Cambodia. Due to a high population growth rate and increased economic activities, land use and land cover (LULC) changes will cause environmental disturbances, particularly soil erosion. This research aimed to estimate total amounts of soil loss using the Revised Universal Soil Loss Equation (RUSLE) model within a Geographic Information System (GIS) environment. LULC maps of Japan International Cooperation Agency (JICA) 2002 and Mekong River Commission (MRC) 2015 were used to evaluate the impact of LULC on soil erosion loss in Stung Sangkae catchment. LULC dynamics for the study periods in Stung Sangkae catchment showed that the catchment experienced a rapid conversion of forests to paddy rice fields and other croplands. The results indicated that the average soil loss from the catchment was 3.1 and 7.6 t/ha/y for the 2002 and 2015 periods, respectively. The estimated total soil loss in the 2002 and 2015 periods was 1.9 million t/y and 4.5 million t/y, respectively. The soil erosion was accelerated by steep slopes combined with the high velocity and erosivity of stormwater runoff. The spatial distribution of soil loss showed that the highest value (14.3 to 62.9 t/ha/y) was recorded in the central, southwestern and upland parts of the catchment. It is recommended that priority should be given to erosion hot spot areas, and appropriate soil and water conservation practices should be adopted to restore degraded lands. |
| Databáze: | OpenAIRE |
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