滇东南峰林湖盆区表层岩溶泉水化学动态变化分析

发布时间：2019-03-17 11:22

【摘要】：为探究不同表层岩溶带岩溶水系统和人类干扰方式下滇东南峰林湖盆区表层岩溶泉地球化学变化特征及其影响因素,利用CTDP300水质检测仪,对不同地质背景下的两泉域的水化学性质从月动态和降雨动态两个尺度进行了一个水文年的观测。结果表明:(1)菜花箐泉理化指标季节动态变幅较大:水温为4.6℃,电导率为302μs/cm,pH为0.66,水浊度为255.1;火把洞泉变幅相对较小:水温为3.3℃,电导率为225μs/cm,pH为0.5,水浊度9.8。(2)无雨时:菜花箐泉气温与水温、电导率、pH呈正相关关系;火把洞气温与水温呈现正相关关系,水温与电导率、pH呈现负相关关系。(3)强降雨时:菜花箐泉在降雨初期水温、电导率、水浊度均出现峰值,pH呈现低值。在降雨中后期,电导率大幅度上升,在6 h内从189μs/cm上升到405μs/cm,pH出现峰值后呈波动下降趋势。火把洞泉在降雨初期水温与电导率、pH呈正相关关系,各自呈现本期间峰值。在降雨持续10 h后,pH、电导率均呈现下降趋势。(4)弱降雨气候条件下:菜花箐和火把洞泉的理化指标变幅都较小,在降雨初期、中期和后期两泉域pH、电导率都出现稀释效应曲线。
[Abstract]:In order to explore the geochemical characteristics and influencing factors of surface karst springs in the Fenglin Lake basin of southeast Yunnan under different karst water systems and human interference modes, a CTDP300 water quality detector was used. The hydrochemical properties of the two spring regions under different geological background are observed in a hydrological year from the monthly dynamics and the rainfall dynamics. The results show that: (1) the seasonal dynamic variation of physicochemical indexes of cauliflower Qingquan is larger: water temperature is 4.6 鈩，

本文编号：2442245