干旱区地理2017，Vol.40Issue(2)：313-321,9.
天山哈密榆树沟流域地下水化学特征及其来源
Chemical characteristic and sources of the groundwater in Yushugou River basin, Hami, Tianshan Mountains
摘要
Abstract
The groundwater chemical characteristics for river basin have important influence on river and river basin water resources utilization.Through the research of groundwater chemical characteristics in Yushugou River basin,Hami,Tianshan Mountains,Xinjiang,China,this paper aims to:(1) reveal the interaction mechanism of the groundwater environment;(2) discuss the evolution rule of groundwater in river basin;(3) provide basic data and data accumulation for the water chemistry research,water resources comprehensive utilization and protection of the ecological environment in the study area.According to the measurement of pH,TDS,EC and major ion composition of groundwater in Yushugou River basin,by combining comprehensive character description method,triangular diagrams of anions and cations,correlation analysis and main ion ratio method,this paper discussed the chemical characteristics and the reasons of groundwater.The results show that the groundwater is weak alkaline.The most main anion and cation are HCO3-and Ca2+,respectively.The concentration orders of cations and anions are Ca2+＞Na+＞Mg2+＞K+ and HCO3-＞ SO42-＞C1-＞NO3-,respectively.The hydrochemical type of groundwater is H2CO3-Ca2+.The average value of TDS is 104.33 mg· L-1 in spring flood period and 99 mg· L-1 in summer flood period,belonging to the weak water salinity.The ions composition in groundwater is mainly influenced by carbonate weathering.The correlations between TDS and Cl-,SO42-,NO3-,Ca2+,Mg2+ and Na+ in groundwater during spring flood period are very high,which shows that the salinity level in groundwater is mainly controlled by the six kinds of ions during the period.During summer flood period,the relationships between pH and Mg2+,K+ and TDS both present negative correlation.This indicates that dissolved concentration of magnesium salt and potassium salt in this period influence the groundwater pH value in some degree.We can judge the basin rarely influenced by agricultural and industrial pollution by the high correlation and less content of anion SO42-and NO3-in groundwater.The cation exchange of groundwater during spring flood period is not significant while during summer flood period the cation exchange is very frequent.In the spring flood period,the ions mainly come from H2CO3 weathering carbonate rocks,with less affected by H2SO4 weathering carbonate rocks.In summer flood period,the weathering process is accompanied by a tiny amount of dissolved silicate rock.关键词
地下水/水化学类型/离子来源/水岩作用/榆树沟流域Key words
groundwater/hydrochemical type/ion source/water-rock interaction/Yushugou River basin分类
天文与地球科学引用本文复制引用
王晓艳,李忠勤,蒋缠文..天山哈密榆树沟流域地下水化学特征及其来源[J].干旱区地理,2017,40(2):313-321,9.基金项目
国家重大科学研究计划项目(超级973项目)(2013CBA01801) （超级973项目）
渭南师范学院科研计划项目(16ZRRC03,16ZRRC02) （16ZRRC03,16ZRRC02）
