长江流域资源与环境 >> 2017, Vol. 26 >> Issue (05): 747-754.doi: 10.11870/cjlyzyyhj201705012
尹继清, 范弢, 晏朋
YIN Ji-qing, FAN Tao, YAN Peng
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302 μs/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225 μs/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189 μs/cm上升到405 μs/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。
中图分类号:
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