Predicted trends of soil erosion and sediment yield from future land use and climate change scenarios in the Lancang–Mekong River by using the modified RUSLE model
Soil erosion and sediments in the Lancang-Mekong River Basin as a result of climate change and changes in land use pose a threat to the existence of the riparian people, biodiversity and ecosystems. This study seeks to assess the annual soil erosion in terms of spatial distribution and the trends of...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2020-09-01
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| Series: | International Soil and Water Conservation Research |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2095633920300447 |
| _version_ | 1797283592273920000 |
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| author | Pavisorn Chuenchum Mengzhen Xu Wenzhe Tang |
| author_facet | Pavisorn Chuenchum Mengzhen Xu Wenzhe Tang |
| author_sort | Pavisorn Chuenchum |
| collection | DOAJ |
| description | Soil erosion and sediments in the Lancang-Mekong River Basin as a result of climate change and changes in land use pose a threat to the existence of the riparian people, biodiversity and ecosystems. This study seeks to assess the annual soil erosion in terms of spatial distribution and the trends of sediment yield with the climate and land changes in future scenarios in 2030 and 2040 through the modified RUSLE model. Future lands were simulated by using the MLP artificial neural network and the Markov chain analysis. The future climate was examined by using the Max Planck Institute model, which showed a corrected bias and downscaled grid size under the Representative Concentration Pathways (RCPs). The simulated land use indicated that the forest areas were converted mostly to agricultural lands and urban areas. In the future, the average rainfall under all RCP scenarios is higher than that from the historical period. The R and C factors changed constantly, thereby affecting the soil erosion rate and sediment yield. The maximum erosion was estimated at approximately 21,000 and 21,725 t/km2/y under RCP8.5 in both years. Meanwhile, the results of sediment yield in 2030 and 2040 under RCP scenarios were much higher when compared to historical sediment data around 66.3% and 71.2%, respectively. Thailand's plateau, some parts of Cambodia and Laos PDR and the Mekong Delta are vulnerable to increase soil erosion and sediment yield. Measures to address these issues need to be planned to prepare and mitigate the possible effects, especially the loss of storage capacity in dams. |
| first_indexed | 2024-03-07T17:33:59Z |
| format | Article |
| id | doaj.art-467be0ff1679457ebb1da6878f013383 |
| institution | Directory Open Access Journal |
| issn | 2095-6339 |
| language | English |
| last_indexed | 2024-03-07T17:33:59Z |
| publishDate | 2020-09-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | International Soil and Water Conservation Research |
| spelling | doaj.art-467be0ff1679457ebb1da6878f0133832024-03-02T17:14:26ZengKeAi Communications Co., Ltd.International Soil and Water Conservation Research2095-63392020-09-0183213227Predicted trends of soil erosion and sediment yield from future land use and climate change scenarios in the Lancang–Mekong River by using the modified RUSLE modelPavisorn Chuenchum0Mengzhen Xu1Wenzhe Tang2Institute of Hydraulic Structures Engineering and Project Management, and State Key Laboratory of Hydroscience Engineering, Tsinghua University, Beijing, 100084, PR ChinaRiver Research Institute, And State Key Laboratory of Hydroscience Engineering, Tsinghua University, Beijing, 100084, PR ChinaInstitute of Hydraulic Structures Engineering and Project Management, and State Key Laboratory of Hydroscience Engineering, Tsinghua University, Beijing, 100084, PR China; Corresponding author.Soil erosion and sediments in the Lancang-Mekong River Basin as a result of climate change and changes in land use pose a threat to the existence of the riparian people, biodiversity and ecosystems. This study seeks to assess the annual soil erosion in terms of spatial distribution and the trends of sediment yield with the climate and land changes in future scenarios in 2030 and 2040 through the modified RUSLE model. Future lands were simulated by using the MLP artificial neural network and the Markov chain analysis. The future climate was examined by using the Max Planck Institute model, which showed a corrected bias and downscaled grid size under the Representative Concentration Pathways (RCPs). The simulated land use indicated that the forest areas were converted mostly to agricultural lands and urban areas. In the future, the average rainfall under all RCP scenarios is higher than that from the historical period. The R and C factors changed constantly, thereby affecting the soil erosion rate and sediment yield. The maximum erosion was estimated at approximately 21,000 and 21,725 t/km2/y under RCP8.5 in both years. Meanwhile, the results of sediment yield in 2030 and 2040 under RCP scenarios were much higher when compared to historical sediment data around 66.3% and 71.2%, respectively. Thailand's plateau, some parts of Cambodia and Laos PDR and the Mekong Delta are vulnerable to increase soil erosion and sediment yield. Measures to address these issues need to be planned to prepare and mitigate the possible effects, especially the loss of storage capacity in dams.http://www.sciencedirect.com/science/article/pii/S2095633920300447Soil erosionSedimentLand use changeClimate changeRUSLE |
| spellingShingle | Pavisorn Chuenchum Mengzhen Xu Wenzhe Tang Predicted trends of soil erosion and sediment yield from future land use and climate change scenarios in the Lancang–Mekong River by using the modified RUSLE model International Soil and Water Conservation Research Soil erosion Sediment Land use change Climate change RUSLE |
| title | Predicted trends of soil erosion and sediment yield from future land use and climate change scenarios in the Lancang–Mekong River by using the modified RUSLE model |
| title_full | Predicted trends of soil erosion and sediment yield from future land use and climate change scenarios in the Lancang–Mekong River by using the modified RUSLE model |
| title_fullStr | Predicted trends of soil erosion and sediment yield from future land use and climate change scenarios in the Lancang–Mekong River by using the modified RUSLE model |
| title_full_unstemmed | Predicted trends of soil erosion and sediment yield from future land use and climate change scenarios in the Lancang–Mekong River by using the modified RUSLE model |
| title_short | Predicted trends of soil erosion and sediment yield from future land use and climate change scenarios in the Lancang–Mekong River by using the modified RUSLE model |
| title_sort | predicted trends of soil erosion and sediment yield from future land use and climate change scenarios in the lancang mekong river by using the modified rusle model |
| topic | Soil erosion Sediment Land use change Climate change RUSLE |
| url | http://www.sciencedirect.com/science/article/pii/S2095633920300447 |
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