南洞地下河流域水质分析及灌溉适用性评价  

Water quality analysis and evaluation of irrigation applicability in Nandong underground river basin,Southwest China

作　　者：李军 杨国丽[1] 朱秀群 徐利[1] 朱丹尼 赵一[2] 李衍青[2] 蓝芙宁[2] LI Jun;YANG Guoli;ZHU Xiuqun;XU Li;ZHU Danni;ZHAO Yi;LI Yanqing;LAN Funing(Hebei Key Laboratory of Water Quality Engineering and Comprehensive Utilization of Water Resources,Hebei University of Architecture,Zhangjiakou,Hebei 075000,China;Institute of Karst Geology,CAGS/Key Laboratory of Karst Dynamics,MNR&GZAR,Guilin,Guangxi 541004,China;College of Hydrology and Water Resources,Hohai University,Nanjing,Jiangsu 210098,China)

机构地区：[1]河北建筑工程学院河北省水质工程与水资源综合利用重点实验室,河北张家口075000 [2]中国地质科学院岩溶地质研究所/自然资源部、广西岩溶动力学重点实验室,广西桂林541004 [3]河海大学水文水资源学院,江苏南京210098

出　　处：《中国岩溶》2023年第2期207-219,共13页Carsologica Sinica

基　　金：河北建筑工程学院基本科研业务项目(2022QNJS05,2021QNJS01);国家重点研发计划课题(2016YFC0502502);河北省教育厅青年基金项目(QN2020424)资助。

摘　　要：为查明云南南洞地下河流域水质特征和农业灌溉适用性,分别在雨季和旱季共采集32组地表河水样和24组地下河水样,进行12种常规指标和9种金属元素检测。利用内梅罗综合指数法进行水质评价,利用钠含量法(SC)、钠吸附比法(SAR)、残余碳酸钠法(RSC)和渗透指数法(PI)揭示雨季和旱季水体的农业灌溉适用性。结果显示,区内水体主要呈弱碱性,Ca^(2+)和HCO_(3)^(-)为主导型离子。地表河水,常规指标仅NH4+含量超过我国相关水质标准限值,金属元素Al、Pb、Mn和As含量超标,旱季超标率总体高于雨季。地下河水的金属元素Al、Pb、Zn、Cr、Mn和As含量超标,雨季超标率总体高于旱季。工矿业活动排放和裸露型岩溶水文地质是导致水体金属元素含量超标的重要原因。据水质评价结果,区内水质整体较好,旱季和雨季水质处于良好及以上级别分别占比89.29%和85.71%。灌溉适用性评价结果显示,区内水体灌溉适用性整体较好,仅在旱季地表河水As含量(54.70μg·L^(-1))高于农田灌溉水质标准中蔬菜和水作标准限值,不适合周边蔬菜和稻田的灌溉。The karst surface water and groundwater of Nandong underground river basin are vital water sources for agricultural and industrial production,and lives of residents in Honghe Hani and Yi Autonomous Prefecture in Yunnan,Southwest China.With a growing public awareness of water environment and water safety,the evaluation of karst water quality and irrigation applicability especially in agricultural regions is becoming increasingly necessary.In this study,32 samples of karst surface river water and 24 samples of underground river water were collected from Nandong underground river basin during dry and rainy seasons.11 inorganic regular ions(i.e.,K^(+),Na^(+),Ca^(2+),Mg^(2+),Cl^(−),SO_(4)^(3-),HCO_(3)^(-),NO_(2),NH4_(4)^(+),and F)and 9 heavy metals(i.e.,Al,Cu,Pb,Zn,Cr,Cd,Ni,Mn,and As)were analyzed in these samples to investigate the water quality and irrigation applicability.Based on the measured concentrations of the hydrochemical composition,the Nemerow composite index in combination with the four irrigation assessment systems of sodium concentration(SC),sodium adsorption ratio(SAR),residual sodium carbonate(RSC),and permeability index(PI)were applied to evaluate the karst water quality and irrigation applicability,respectively.Results show that Ca2+and were identified as the major ions in both karst surface water and karst groundwater,indicating weakly alkaline karst water in the study area.For karst surface water,among the 11 inorganic regular ions,only NH was found exceeding the maximum acceptable level for drinking water recommended by General Administration of Quality Supervision,Inspection and Quarantine of the People's Republic of China.Meanwhile,among the 9 heavy metals,the concentrations of Al,Pb,Mn,and As were evaluated as exceeding the maximum acceptable level.Moreover,the rates of measured ions exceeding permitted levels in the dry season were generally higher than those in the rainy season.For karst groundwater,the concentrations of Al,Pb,Zn,Cr,Mn,and As exceeded the maximum acceptable levels,and the

关 键 词：南洞地下河流域 常规指标 金属元素 水质评价 灌溉适用性 

分 类 号：S274[农业科学—农业水土工程] X826[农业科学—农业工程]