黄河下游(开封)浅层地下水化学特征及灌溉适宜性评价  

Evaluation on Chemical Characteristics and Irrigation Suitability of Shallow Groundwater in the Lower Yellow River(Kaifeng)

作　　者：毕广旭 杜小冲 孙新华 姚文鹏 郝珺 BI Guang-xu;DU Xiao-chong;SUN Xin-hua;YAO Wen-peng;HAO Jun(He'nan Academy of Geology,Zhengzhou 450016,China;Key Laboratory of Water&Soil Resources Conservation&Restoration in the Middle&Lower Reaches of Yellow River Basin,MNR,Zhengzhou 450016,China;Henan Province Natural Resources Science and Technology Innovation Center(Research on Soil&Water Ecological Restoration Governance),Zhengzhou 450016,China)

机构地区：[1]河南省地质研究院,郑州450016 [2]自然资源部黄河流域中下游水土资源保护与修复重点实验室,郑州450016 [3]河南省自然资源科技创新中心(水土生态修复治理研究),郑州450016

出　　处：《四川环境》2024年第5期57-64,共8页Sichuan Environment

基　　金：2022年中央水污染防治资金(Z155110010004);2023年度河南省地质研究院地质科技攻关“揭榜挂帅”项目(2023-906-XM015-KT01);河南省自然资源部省合作科技项目(豫部省合作2024-2)。

摘　　要：黄河流域水资源需求逐年上升,其中地下水在水资源利用方面,尤其是农业灌溉方面分发挥着越来越重要的作用。研究采集浅层地下水水样100组,分析其水化学特征与成因,利用钠吸附比(SAR)、残余碳酸钠(RSC)、可溶性钠含量(SC)、渗透指数(PI)、镁危害(MH)等指标以及《农田灌溉水质标准》(GB5084—2021)评价其灌溉适宜性。研究结果表明,研究区阴离子以HCO_(3)^(-)为主,阳离子分布相对较为均衡,地下水化学特征主要受到硅酸盐矿物风化水解以及碳酸盐岩风化作用控制。灌溉适宜性结果表明,从SAR、SC、PI显示基本均适宜灌溉,此区域不存在高盐度水体灌溉,而RSC、MH指数显示研究区地下水灌溉存在较高的土壤板结风险。本研究为开封地区合理选用灌溉水源提供数据支撑,为该区域地下水管控提供科学依据。With the increasing demands for water resources in the Yellow River Basin,groundwater plays an increasingly important role,particularly in agricultural irrigation.In this study,100 samples of shallow groundwater were collected to analyze their chemical characteristics and origins.The irrigation suitability was evaluated by using indicators such as sodium adsorption ratio(SAR),residual sodium carbonate(RSC),soluble sodium content(SC),permeability index(PI),magnesium hazard(MH),and the Quality Standards for Irrigation Water(GB5084—2021).The results showed that HCO_(3)^(-) dominated the anions in the study area,while cations were evenly distributed.The chemical characteristics of groundwater were mainly subject to silicate mineral weathering and carbonate rock dissolution.The irrigation suitability evaluation indicated that SAR,SC,and PI values generally indicated suitable conditions for irrigation,without high salinity water bodies in this region.However,RSC and MH indices suggested a higher risk of soil compaction due to underground water irrigation.This study provides data support for selecting appropriate sources of irrigation water in Kaifeng and offers scientific basis for groundwater management.

关 键 词：黄河灌区 地下水 水化学特征 灌溉适宜性 

分 类 号：X523[环境科学与工程—环境工程] P641.7[天文地球—地质矿产勘探]