【摘 要】
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本文针对北京市管网排水地区特点,将流域简化戎完全不透水铺面和透水铺面来模拟地表净雨过程.降雨损失计算主要考虑雨期蒸发、洼地蓄水和土壤下渗。地面洼地蓄水随次降雨量增
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本文针对北京市管网排水地区特点,将流域简化戎完全不透水铺面和透水铺面来模拟地表净雨过程.降雨损失计算主要考虑雨期蒸发、洼地蓄水和土壤下渗。地面洼地蓄水随次降雨量增加而逐步累积至流域最大洼蓄量,可用林斯莱公式描述;下渗仅发生于透水面积,采用霍顿下渗公式计算。在汇流计算中,分地面汇流和管网汇流两个阶段。地面汇流是根据地面集流时间采用线性水库模型模拟;模型管网汇流采用一般水库调蓄演算方法。通过对地处市区的太平湖流域雨洪过程模拟和验证结果表明,这一模型对北京市管网排水流域是适用的。
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