干旱区地理2024，Vol.47Issue(10)：1617-1627,11.DOI:10.12118/j.issn.1000-6060.2024.162
昆仑山北坡车尔臣河流域平原区地表水和地下水水化学特征
Chemical characteristics of surface water and groundwater in plain area of the Qargan River Basin on the north slope of Kunlun Mountains
摘要
Abstract
Agricultural water constitutes a significant proportion of total water consumption in the Qargan River Basin.The imbalance between water supply and demand in this region has become increasingly prominent.Un-derstanding the hydrochemical characteristics of irrigation water and groundwater in the Qargan River Basin is crucial for effective water resource allocation and ecological security within the oasis.This study examines the hydrochemical parameters,as well as the stable isotopic compositions of hydrogen and oxygen,in river water,channel water,and groundwater from the plain areas of the basin.Data were collected through field investiga-tions,mathematical statistical analyses,and hydrochemical methods to explore the interaction between irrigation water and groundwater.The key findings are as follows:(1)River water,channel water,and groundwater are all weak-ly alkaline,with elevated fluoride content in each.The predominant hydrochemical type for all water bodies is SO4·Cl-Na,with SO42-and Na+as the dominant anion and cation,respectively.Groundwater and channel water show trends of salinization,whereas the river water quality is comparatively better.(2)The three water bodies exhibit similar hydrochemical characteristics.Ion sources in river water and channel water are primarily controlled by rock weathering,while groundwater is influenced by both rock weathering and evaporative concentration.(3)The slopes of the river water,channel water,and groundwater lines are 3.70,0.61,and 1.42,respectively,which are lower than the slope(5.62)of the local meteoric water line(LMWL).Additionally,nearly all sampling sites for the three water bodies are distributed below the LMWL in a relatively compact manner.This suggests that river and channel waters are closely hydrologically connected to groundwater and act as the primary recharge sources,contributing 56.48%and 43.52%,respectively,to groundwater replenishment.关键词
车尔臣河流域/水化学特征/氢氧稳定同位素/灌溉水/地下水Key words
Qargan River Basin/hydrochemical characteristics/stable isotopes of hydrogen and oxygen/irriga-tion water/groundwater引用本文复制引用
吕雯改,江宇威,马兴羽,刘蕾,薛杰,张波,黄彩变..昆仑山北坡车尔臣河流域平原区地表水和地下水水化学特征[J].干旱区地理,2024,47(10):1617-1627,11.基金项目
第三次新疆综合科学考察项目(2021xjkk0102)资助 （2021xjkk0102）
