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本文利用Hydrus-1D模型对灌木与乔木的耗水量,截留蒸发,以及下垫面50厘米深的土层的储水量与深层渗漏进行了模拟。同时,依据该地区气候变化预测和当地政府对土地利用的规划——增加乔木覆盖取代灌木——进行了模拟。
结果显示,灌木蒸腾和冠层截留都低于乔木,土层储水量和深层渗漏均高于乔木,土壤蒸发两者相近,归因于植被密度较高导致的低透光率;气候变化的对水文过程的影响远低于植被更替,4月至10月生长季节里影响最大。
• Land cover and climate change impacts on soil water balance were modelled.
• Vegetation effects were mainly reflected by evapotranspiration and interception.
• Land cover change is expected to exert stronger impacts than climate change.
• More marked impacts were projected to occur in warm seasons than cold seasons.
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