快速城镇化改变了城市土地利用结构, 致使城市区域的蒸散发发生变化。城市区域除了常见下垫面的蒸发, 建筑内部的蒸发耗水也不可忽略。根据下垫面的不同功能, 城镇建设用地可分为道路、绿地、水面和建筑4种类型, 该文以北京市城六区为例, 在2000、2015和2018年的城镇化水平下, 综合自然蒸散发和建筑内部蒸发耗水, 研究了城镇化和非首都功能疏解进程对城市区域蒸散发的影响, 结果表明:城镇化进程对城镇建设用地的蒸散发具有显著增强作用, 其中人口密度是影响其蒸散发的关键因素; 非首都功能疏解降低了城市社会用水的聚集程度, 同时也降低了城市区域蒸散发。根据各类下垫面对区域蒸散发的贡献率可知, 建筑体和绿地蒸散发占据主体地位。
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