摘要
膨胀性土壤吸水会发生膨胀变形,这对降雨入渗产流过程有显著影响。本文以Green-Ampt模型为基础,提出了考虑土壤膨胀性的非稳定降雨入渗产流模型(GJGAM)。为量化土壤膨胀性对降雨入渗产流过程的影响,文章引入了考虑土壤膨胀性的土壤饱和导水系数及饱和含水量,并提出了两参数的计算方法。同时,应用GJGAM和传统的不考虑土壤膨胀性模型(TGAM)分别模拟了径流强度和土壤累计入渗量的室内试验过程,并与试验观测值进行了对比分析。结果表明:利用GJGAM模拟得到的土壤累计入渗量和径流强度与其实测结果吻合良好,而TGAM模拟得到的土壤累计入渗量大于实测值,而径流强度小于实测值。
The soil swelling and deformation will happen when swelling soils absorb water. Soil swelling and deformation has great influence on soil water infiltration process. Based on Green-Ampt, an algorithm considered soil swelling and deformation was proposed for simulating infiltration into swelling soil under un- steady rainfall （GJGAM）. The soil saturated hydraulic conductivity and soil saturated water content consid- ered soil swelling were introduced to account for the effect of soil swelling on soil rainfall-infiltration, and could be approximately determined by soil physical properties. Meanwhile, the model （GJGAM） and the tra- ditional Green-Ampt model without considering soil swelling （TGAM） were applied to simulate runoff rate and cumulative infiltration, and compared with the observed data in the experiments. The results indicate that the calculated runoff rate and cumulative infiltration by the GJGAM model were all in good agreement with the observed values. However, when using the TGAM model, the calculated runoff rate was less than the observed value, and the calculated cumulative infiltration were larger than the observed value.
出处
《水利学报》
EI
CSCD
北大核心
2017年第10期1220-1228,1239,共10页
Journal of Hydraulic Engineering
基金
国家重点基础研究发展规划项目(2015CB452701)
国家自然科学基金项目(51379215
50939006)
流域水循环模拟与调控国家重点实验室自主研究课题(2016ZY03)
作者简介
甘永德（1985-），男，青海民和人，博士，主要从事水文模型研究。E-mail：bjganyd@163．com.;通讯作者：贾仰文（1965-），男，山东成武人，博士生导师，教授级高级工程师，主要从事流域水循环模拟和水资源规划管理研究。E—mail：jiayw@iwhr．com
