摘要
利用pH、电导率自动记录仪,对长安县南黄土岩溶泉进行了为期一年的观测。结果表明,从1-12月长安黄土岩溶泉水pH值与电导率呈现由大变小再变大的规律,引起这一变化的原因是降水量与温度的变化。降水量多与温度高的月份pH值与电导率变小,反之,则变大。长安黄土岩溶泉是通过缓慢、均匀的入渗补给的,这决定了它比碳酸岩岩溶泉的pH低,电导率大。
Loess contains richly CaCO3 which is uniformly distributed, pores develop in loess, and CaCO3 in the loess is easier to be dissolved than that in limestone. Although the karsts in loess are not so obvious comparing with that in limestone, they occur frequently. In this paper, the karst springs in Yangwan Village, Chang'an County, Shaanxi Province, are observed for one year by using the automatic meters of pH and conductivity. The results show that the pH values and conductivities of the karst springs m the village change from high values to low ones and then high ones, these are closely related to precipitation and temperature, that is the pH values and conductivities are low when the precipitation is more and the temperature is high, contrarily, the values become high. The karst springs in the village are recharged by slow and uniform permeation, so the pH values of the karst springs in loess are lower but the conductivities are higher than that in limestone.
出处
《干旱区研究》
CSCD
2004年第4期318-322,共5页
Arid Zone Research
基金
国家自然科学基金项目(40372117)国土资源部岩溶动力学重点实验室项目(2004-5-3)
