Water balance components estimation under scenarios of land cover change in the Vea catchment, West Africa
Water balance components estimation under scenarios of land cover change in the Vea catchment, West Africa
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DOI：
10.1080/02626667.2020.1802467
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发表时间：
2020-07
影响因子：
3.5
通讯作者：
I. Larbi;E. Obuobie;A. Verhoef;S. Julich;Karl-Henz Feger;A. Bossa;D. Macdonald
中科院分区：
文献类型：
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作者：
I. Larbi;E. Obuobie;A. Verhoef;S. Julich;Karl-Henz Feger;A. Bossa;D. Macdonald
摘要由于VEA集水区的土地复盖动态加速及其对水文过程的相关影响，对VEA集水区水量平衡组成部分进行详细调查的必要性怎么强调都不为过。这项研究使用土壤和水评估工具(SWAT)模型评估了土地利用变化情景(即2025年一切照旧、BAU和植树造林)与2016年VEA流域水量平衡成分基线的可能后果。使用的数据包括每日气候和排放、土壤和土地利用/土地覆盖地图。结果表明，在BAU情景下，年平均产水量增加9.1%，在植树造林情景下，年平均产水量下降2.7%；实际蒸散量在BAU情景下减少，在植树造林情景下增加；地下水补给量在两种情景下都有增加，但在植树造林情景下更为明显。这些成果突出了土地复盖动态在流域水资源管理和规划中的重要性。
ABSTRACT The need for a detailed investigation of the Vea catchment water balance components cannot be overemphasized due to its accelerated land-cover dynamics and the associated impacts on the hydrological processes. This study assessed the possible consequences of land-use change scenarios (i.e. business as usual, BAU, and afforestation for the year 2025) compared to the 2016 baseline on the Vea catchment’s water balance components using the Soil and Water Assessment Tool (SWAT) model. The data used include daily climate and discharge, soil and land use/land cover maps. The results indicate that the mean annual water yield may increase by 9.1% under the BAU scenario but decrease by 2.7% under the afforestation scenario; actual evapotranspiration would decrease under BAU but increase under afforestation; and groundwater recharge may increase under both scenarios but would be more pronounced under the afforestation scenario. These outcomes highlight the significance of land-cover dynamics in water resource management and planning at the catchment.