Application of HYDRUS-1D in understanding soil water movement at two typical sites in the North China Plain

• 作者: SHAO Jing-li SONG Xian-fang WANG Shi-qin WEI Shou-cai
• 来源期刊: 地下水科学与工程：英文版
• 学科: 工学
• 关键词: HYDRUS-1D software Soil water movement Precipitation INFILTRATION EVAPOTRANSPIRATION GROUNDWATER RECHARGE
• 年，卷（期）: dxskxygcywb_2016,（1）
• 页码范围: 1-11
• 页数: 11页
• 分类号: TV

摘要

Recharge and discharge, such as rainfall infiltration and evapotranspiration invertical direction, are major processes of water cycle in the shallow groundwater area of theNorth China Plain. During these processes, soil water movement in the unsaturated zone playsan important role in the transformation from rainfall infiltration to groundwater. The soilwater movement models were developed by using HYDRUS-1D software at two typicalexperimental sites in Cangzhou （CZ） and Hengshui （HS） with different soil, vegetation andsimilar climate conditions. As shown in the results, the comparison in precipitation infiltrationfeatures between the two sites is distinct. The soil water experiences strong evaporation afterprecipitation infiltration, which accounts for 63% of the total infiltration at the HS site wherethe soil is homogenous. It is this strong evaporation effect that leads to slight increase of soilwater storage. At the CZ site, where the soil is heterogeneous, the evaporation effect existsfrom July to October of the simulation period. The total evaporation accounts for 33% of thetotal infiltration, and the evaporation rate is slow. At the end of the simulation period, the soilwater storage increases and the water table decreases, indicating a strong storage capacity atthis site.