摘要
为定量化评估区域产流的影响因子,构建野外试验基地,对太湖流域2个不同试验区的降雨、蒸散发量、土壤含水量、地下水位和地表水动态进行野外监测,通过对不同降雨径流过程的水量平衡分析可得:Dunne产流是太湖流域平原区产生径流的主要机制,红旗圩试验基地的总降雨量和径流量呈良好的线性关系,其确定性系数R 2=0.95;土壤蓄水量与初始地下水埋深之间存在良好线性关系,反映了浅层地下水和土壤水之间的强相互作用,因此可以将地下水初始埋深作为前期土壤水分估算的指标;根据各次降雨过程的水量平衡分析,得到洼地蓄水量范围为4.72~8.03 mm,说明在计算平原区产流过程时不应忽略洼地蓄水量。
To quantitatively evaluate the influence factors of regional runoff,a field base was constructed,and field data about the rainfall,evapotranspiration,soil moisture,groundwater table,and surface water dynamics were collected in two different experimental sites of the Taihu Basin,China.Through the analysis of water balance in different rainfall runoff processes,it was found that the Dunne overland flow was the dominant mechanism responsible for the rapid runoff generation.The total rainfall and runoff expressed a good linear relationship with an R 2 of 0.95 in the Hongqiwei test site.In addition,the initial groundwater depth was considered as the indicator of the antecedent soil moisture estimation for the close linear relationship that indicated the strong interaction between shallow groundwater and soil moisture.The depression storage was recommended in a range from 4.72 to 8.03 mm according to an estimation based on the water balance analysis for each rainfall event,which proves that the depression storage should not be neglected when calculating the runoff generation process in plain areas.
作者
陈钢
王船海
翟月
陈云飞
张娉楠
茅志兵
CHEN Gang;WANG Chuanhai;ZHAI Yue;CHEN Yunfei;ZHANG Pingnan;MAO Zhibing(State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Hohai University,Nanjing 210098,China;College of Hydrology and Water Resources,Hohai University,Nanjing 210098,China;Nanjing Huishui Software Technology Co.,Ltd.,Nanjing 210019,China;River and Lake Management Department of Jintan District,Changzhou 213200,China)
出处
《河海大学学报（自然科学版）》
CAS
CSCD
北大核心
2021年第1期57-63,共7页
Journal of Hohai University(Natural Sciences)
基金
国家重点研发计划(2018YFC0407900)
国家自然科学基金(41901020)
中央高校基本科研业务费专项(B200202030)。
关键词
降雨径流
前期土壤水分
浅层地下水位
洼地蓄水
太湖流域
rainfall runoff
antecedent soil moisture
shallow groundwater table
depression storage
Taihu Basin
