Numerical modeling of rainfall recharge under conditions of variable rainfall infiltration recharge rates
The rainfall infiltration recharge is usually non-linear with the precipitation. It is obvious that the traditional method for calculating rainfall recharge by multiplying precipitation with a constant rainfall infiltration coefficient has limitations. This paper discusses how to construct a rainfall infiltration recharge function and how to employ the rainfall infiltration recharge function to resolve practical problems in the Shuangcun karst water system in North China. The Pearson III accumulative frequency distribution function was used as the pattern of the rainfall recharge function. By focusing on the construction and application of the rainfall recharge function, the simulation effects get great improvement. The percentage of comparison nodes with less than lm error increases from 29％ in the original model to 86％ in the improved model. As a result of the modeling, the karst water receiving rainfall infiltration recharge in the exposed karst strata in hilly areas increased from 74000 m3/d to 106000 m3/d, and the coefficients of rainfall infiltration grew from 0.206 in the early period to 0.245 in the late period.
A.M.Wu Y.Z.Xu C.Q.Li J.T.Wang Y.H.Wang Y.C.Liang
China Institute of Geo-environmental Monitoring.20 Dahuisi,Haidian district,Beijing, 100081,P.R.Chin China Institute of Geo-environmental Monitoring.20 Dahuisi,Haidian district,Beijing,100081,P.R.China China Institute of Geo-environmental Monitoring.20Dahuisi,Haidian district,Beijing,100081,P.R.China China Institute of Geo-nvironmental Monitoring.20 Dahuisi, Haidian district,Beijing,100081,P.R.China China University of Geosciences,29 Xueyuan Road, Haidian istrict,Beijing,100083,P.R.China Lunan institute of Goe-engineering exploration of Shandong Province, Yanzhou,Shandong, 272000.P.R.Ch
国际会议
武汉
英文
215-218
2009-09-20（万方平台首次上网日期，不代表论文的发表时间）