Land cover change mitigated 20 % of the total increased evapotranspiration in tropical Lancang-Mekong River Basin during 2001–2019
Study region: The tropical Lancang-Mekong River Basin (TLMRB), Southeast Asia. Study focus: Accurately assessing evapotranspiration (ET) change derived from land cover changes (LCCs) is challenging in tropical regions due to the large bias in existing ET products and the difficulty in improving the...
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Elsevier
2025-02-01
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| Series: | Journal of Hydrology: Regional Studies |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214581824005093 |
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| author | Houbing Chen Yaoliang Chen Lamin R. Mansaray Longwei Li Shusen Wang |
| author_facet | Houbing Chen Yaoliang Chen Lamin R. Mansaray Longwei Li Shusen Wang |
| author_sort | Houbing Chen |
| collection | DOAJ |
| description | Study region: The tropical Lancang-Mekong River Basin (TLMRB), Southeast Asia. Study focus: Accurately assessing evapotranspiration (ET) change derived from land cover changes (LCCs) is challenging in tropical regions due to the large bias in existing ET products and the difficulty in improving the ET al.gorithm for tropical ecosystems. This study quantified the LCCs-driven ET in the TLMRB from 2001 to 2019 by using scenario simulations based on an improved MOD16 algorithm. A soil moisture index was introduced to improve the soil evaporation of the original MOD16 model. New hydrological insights for the region: The improved MOD16 algorithm showed better performance with the average Root Mean Square Error decreasing by 0.12 mm/day compared with the original MOD16 ET. The improved ET of the wet climate conditions was more significant than that under dry climate conditions. LCCs led to a 3.45 mm/yr decrease in average ET, and mitigated 20 % of increased ET. LCCs caused a net reduction of 7.44 billion m³ in ET water consumption. This decrease in ET, may intensify the surface runoff and raise the risk of extreme floods in the rain season. These findings enhance our understanding of the relationship between LCCs and ET in tropical regions, and provide valuable insights for trans-boundary collaborations and water resource management in the TLMRB. |
| format | Article |
| id | doaj-art-20db32aff7ed47cf977f7469965c4bf4 |
| institution | Kabale University |
| issn | 2214-5818 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Hydrology: Regional Studies |
| spelling | doaj-art-20db32aff7ed47cf977f7469965c4bf42025-01-22T05:42:15ZengElsevierJournal of Hydrology: Regional Studies2214-58182025-02-0157102160Land cover change mitigated 20 % of the total increased evapotranspiration in tropical Lancang-Mekong River Basin during 2001–2019Houbing Chen0Yaoliang Chen1Lamin R. Mansaray2Longwei Li3Shusen Wang4Key Laboratory of Humid Subtropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou 350117, China; School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China; School of Geography and Planning, Sun Yat-sen University, Guangzhou 510006, ChinaKey Laboratory of Humid Subtropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou 350117, China; School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China; Corresponding author at: Key Laboratory of Humid Subtropical Eco-geographical Process of Ministry of Education, School of Geographical Sciences, Fujian Normal University, Fuzhou 350117, ChinaLaboratory of Remote Sensing and GIS, Institute of Geography and Development Studies, School of Environmental Sciences, Njala University, PMB, Njala Campus, Sierra LeoneAnhui Province Key Laboratory of Physical Geographic Environment, Chuzhou University, Chuzhou 239000, China; Anhui Engineering Laboratory of Geo-information Smart Sensing and Services, Chuzhou 239000, China; Anhui Center for Collaborative Innovation in Geographical Information Integration and Application, Chuzhou 239000, ChinaCanada Centre for Remote Sensing, Natural Resources Canada, Ottawa K1A 0E4, CanadaStudy region: The tropical Lancang-Mekong River Basin (TLMRB), Southeast Asia. Study focus: Accurately assessing evapotranspiration (ET) change derived from land cover changes (LCCs) is challenging in tropical regions due to the large bias in existing ET products and the difficulty in improving the ET al.gorithm for tropical ecosystems. This study quantified the LCCs-driven ET in the TLMRB from 2001 to 2019 by using scenario simulations based on an improved MOD16 algorithm. A soil moisture index was introduced to improve the soil evaporation of the original MOD16 model. New hydrological insights for the region: The improved MOD16 algorithm showed better performance with the average Root Mean Square Error decreasing by 0.12 mm/day compared with the original MOD16 ET. The improved ET of the wet climate conditions was more significant than that under dry climate conditions. LCCs led to a 3.45 mm/yr decrease in average ET, and mitigated 20 % of increased ET. LCCs caused a net reduction of 7.44 billion m³ in ET water consumption. This decrease in ET, may intensify the surface runoff and raise the risk of extreme floods in the rain season. These findings enhance our understanding of the relationship between LCCs and ET in tropical regions, and provide valuable insights for trans-boundary collaborations and water resource management in the TLMRB.http://www.sciencedirect.com/science/article/pii/S2214581824005093Latent heatLand cover changeMekong River BasinScenario simulationTropical ecosystem |
| spellingShingle | Houbing Chen Yaoliang Chen Lamin R. Mansaray Longwei Li Shusen Wang Land cover change mitigated 20 % of the total increased evapotranspiration in tropical Lancang-Mekong River Basin during 2001–2019 Journal of Hydrology: Regional Studies Latent heat Land cover change Mekong River Basin Scenario simulation Tropical ecosystem |
| title | Land cover change mitigated 20 % of the total increased evapotranspiration in tropical Lancang-Mekong River Basin during 2001–2019 |
| title_full | Land cover change mitigated 20 % of the total increased evapotranspiration in tropical Lancang-Mekong River Basin during 2001–2019 |
| title_fullStr | Land cover change mitigated 20 % of the total increased evapotranspiration in tropical Lancang-Mekong River Basin during 2001–2019 |
| title_full_unstemmed | Land cover change mitigated 20 % of the total increased evapotranspiration in tropical Lancang-Mekong River Basin during 2001–2019 |
| title_short | Land cover change mitigated 20 % of the total increased evapotranspiration in tropical Lancang-Mekong River Basin during 2001–2019 |
| title_sort | land cover change mitigated 20 of the total increased evapotranspiration in tropical lancang mekong river basin during 2001 2019 |
| topic | Latent heat Land cover change Mekong River Basin Scenario simulation Tropical ecosystem |
| url | http://www.sciencedirect.com/science/article/pii/S2214581824005093 |
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