膨胀性土壤降雨入渗产流模型
发布时间：2019-01-09 15:59
【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。
[Abstract]:Swelling deformation will occur in expansive soil water absorption, which has a significant effect on the process of rainfall infiltration and runoff production. Based on the Green-Ampt model, a model of unstable rainfall infiltration and runoff production, (GJGAM). Considering soil swelling, is proposed in this paper. In order to quantify the effect of soil swelling on the process of rainfall infiltration, the saturated water conductivity and saturated water content of soil were introduced, and the calculation method of two parameters was put forward. At the same time, GJGAM and (TGAM), a traditional model without considering soil expansibility, were used to simulate the indoor test process of runoff intensity and soil cumulative infiltration, respectively, and the results were compared with the observed values. The results show that the soil cumulative infiltration and runoff intensity obtained by GJGAM simulation are in good agreement with the measured results, while the soil cumulative infiltration obtained by TGAM simulation is larger than the measured value, while the runoff intensity is less than the measured value.
【作者单位】： 中国水利水电科学研究院流域水循环模拟与调控国家重点实验室;
【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)
【分类号】：S152.7
本文编号：2405839
[Abstract]:Swelling deformation will occur in expansive soil water absorption, which has a significant effect on the process of rainfall infiltration and runoff production. Based on the Green-Ampt model, a model of unstable rainfall infiltration and runoff production, (GJGAM). Considering soil swelling, is proposed in this paper. In order to quantify the effect of soil swelling on the process of rainfall infiltration, the saturated water conductivity and saturated water content of soil were introduced, and the calculation method of two parameters was put forward. At the same time, GJGAM and (TGAM), a traditional model without considering soil expansibility, were used to simulate the indoor test process of runoff intensity and soil cumulative infiltration, respectively, and the results were compared with the observed values. The results show that the soil cumulative infiltration and runoff intensity obtained by GJGAM simulation are in good agreement with the measured results, while the soil cumulative infiltration obtained by TGAM simulation is larger than the measured value, while the runoff intensity is less than the measured value.
【作者单位】： 中国水利水电科学研究院流域水循环模拟与调控国家重点实验室;
【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)
【分类号】：S152.7
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