Application of HYDRUS-1D in understanding soil water movement at two typical sites in the North China Plain
Application of HYDRUS-1D in understanding soil water movement at two typical sites in the North China Plain作者机构：Key Laboratory of Agricultural Water ResourcesCenter for Agricultural Resources ResearchInstitute of Genetics and Developmental BiologyChinese Academy of Sciences Key Laboratory of Water Cycle and Related Land Surface ProcessesInstitute of Geographical Sciences and Natural Resources ResearchChinese Academy of Sciences Academy of Water Resources and EnvironmentChina University of Geosciences
出 版 物：《Journal of Groundwater Science and Engineering》 (地下水科学与工程（英文版）)
年 卷 期：2016年第4卷第1期
页 面：1-11页
学科分类：09[农学] 0815[工学-水利工程] 0903[农学-农业资源与环境] 090301[农学-土壤学]
基 金：financially supported by the 100-Talent Project of Chinese Academy of Sciences the Key Program of the National Natural Science Foundation of China (No.41471028)
主 题：HYDRUS-1D software Soil water movement Precipitation infiltration Evapotranspiration Groundwater recharge
摘 要：Recharge and discharge, such as rainfall infiltration and evapotranspiration in vertical direction, are major processes of water cycle in the shallow groundwater area of the North China Plain. During these processes, soil water movement in the unsaturated zone plays an important role in the transformation from rainfall infiltration to groundwater. The soil water movement models were developed by using HYDRUS-1D software at two typical experimental sites in Cangzhou(CZ) and Hengshui(HS) with different soil, vegetation and similar climate conditions. As shown in the results, the comparison in precipitation infiltration features between the two sites is distinct. The soil water experiences strong evaporation after precipitation infiltration, which accounts for 63% of the total infiltration at the HS site where the soil is homogenous. It is this strong evaporation effect that leads to slight increase of soil water storage. At the CZ site, where the soil is heterogeneous, the evaporation effect exists from July to October of the simulation period. The total evaporation accounts for 33% of the total infiltration, and the evaporation rate is slow. At the end of the simulation period, the soil water storage increases and the water table decreases, indicating a strong storage capacity at this site.
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