广西平果县赤泥堆场周边岩溶地下水动态变化特征

摘要

Based on the analysis of long-term observation data of groundwater around red dumps in Pingguo County,the groundwater level,the spring flow and the groundwater temperature in study area all varied periodi-cally with climate,the genetic type of the groundwater dynamic variation was judged as rainfall infiltration type. The basic of groundwater dynamic variation characters were as following:the variations with rainfall in peak-cluster depression area were greater than that in peak forest valley,while in peak forest valley area,the varia-tion was greater than that in isolated peak plain.This is resulted from the diversity of their topographic feature and the degree of karst development.The attenuation equations of water level and springs discharge are derived from statistical analysis.The storage capacity of groundwater is 17.57 million cubic meters according to the at-tenuation equation of springs discharge,and the average rainfall infiltration coefficient in the domain of springs is 0.42 by inversion.%根据地下水的长期观测资料，广西平果县赤泥堆场周边的岩溶地下水位、泉流量、地下水水温动态都明显地随季节呈周期性变化，为此判断其动态成因类型为降雨入渗亚型。该区地下水动态随降雨变化的基本特征是：峰丛洼地比峰林谷地的明显，峰林谷地比孤峰平原区的显著，这种变化是由于地貌和岩溶发育程度的差异所致。利用统计分析求出地下水水位和泉流量的衰减方程，并根据泉水流量的衰减方程推算出泉域内岩溶地下水储存量为1757万 m3，并反算出泉域范围内的平均降雨入渗系数约为0.42。