丹江河流枯水期水化学特征及离子来源分析  

Analysis on Hydrochemical Characteristics and Iron Sourcesin Dry Season of Dan River

作　　者：赵培[1] 杨维鸽 李晓刚[1] ZHAO Pei;YANG Weige;LI Xiaogang(Department of Geography,Shangluo University,Shangluo 726000,China)

机构地区：[1]商洛学院地理系,陕西商洛726000

出　　处：《甘肃科学学报》2023年第2期26-30,共5页Journal of Gansu Sciences

基　　金：陕西省创新人才推进计划(2017KJXX-74)。

摘　　要：丹江河水水化学特征是南水北调中线水源地水质的重要指标之一。在2017年10月—2018年4月采集了丹江不同河段河水样品,研究枯水期河水中主要化学离子的质量浓度及其来源。结果表明:丹江水体中主要阳离子为Ca^(2+),主要阴离子为SO_(4)^(2-),各离子质量浓度与长江、汉江相似,唯有Mg^(2+)质量浓度高于长江、汉江水体;丹江水体表现出硝酸盐污染,且从上游到下游NO_(3)^(-)质量浓度在增加,表明人类活动对河流水质的影响在增强。丹江水离子主要来源为岩石风化,大气降水以及人类活动对丹江干流河水的水体也有一定影响。The chemical characteristics of Dan River is one of the important indicators of the water source quality of South-North Water Transfer Project.From October 2017 to April 2018,water samples were taken from the upstream,middlestream and downstream of the Dan River in order to research on the concentrations of main ions in water and their affecting factors.The results show that the main cation is Ca^(2+)and the main anionic is SO_(4)^(2-)in the water of Dan River,which is similar to the Yangtze River and Han River.From upstream to downstream,NO_(3)^(-)concentration showed increased trend.This implied that the nitrate pollution increased from upstream to downstream.The main source for the iron in Dan River is the rock weathering.In addition,atmospheric precipitation and human activities also have impact on these irons composition in Dan River.

关 键 词：水化学特征 岩石风化 地表水 丹江 南水北调 

分 类 号：P342[天文地球—水文科学]