煤矿采空区对册田水库流域降雨形成径流的影响

为研究煤矿开采所导致的水文过程,以册田水库水文站控制流域为例,通过建立适合流域的水文模型,以流域1973～2003年23个典型降雨数据为基础,对模型参数进行评价和验证,并将传统模型参数率定结果与考虑采空区模型参数率定结果进行对比。结果表明,在考虑采空区影响的饱和导水率Ks值是未考虑采空区影响的饱和导水率Ks值的5倍,考虑采空区影响的土壤吸收率Sr值是未考虑采空区影响的土壤吸收率Sr值的2倍的情况下,洪水预报的准确性得到了显著提高。研究指出了考虑采空区特殊下垫面影响下的洪水预报规律,对采空区洪水预报具有重要意义。

Influence of Coal Mine Goaf on Rainfall Runoff Formation in Cetian Reservoir Basin

In order to study the hydrologic process caused by coal mining, taking the control basin of the hydrological station of the cetian reservoir as an example, based on 23 typical rainfall data of the watershed from 1973 to 2003, the model parameters were evaluated and verified by establishing a suitable hydrological model for the basin. And then the parameter calibration results of the traditional model were compared with those of the goaf model. It shows that the saturated water conductivity value Ks considering the influence of goaf is 5 times of that without considering the influence of goaf, and the soil absorption rate Sr considering the influence of goaf is 2 times of that without considering the influence of goaf; The accuracy of flood prediction is significantly improved. The study points out the rule of flood forecasting considering the influence of special underlying surface of goaf, which is of great significance to the flood forecasting of goaf.