滇西腾冲火山群典型地下水系统特征及地下水脆弱性评价  

Characteristics of groundwater system and assessment of groundwater vulnerability of the Tengchong volcano group in western Yunnan

作　　者：王泱泱 黄胜东 潘东 黄贵任 王宇 常河[1] 蒲悦 WANG Yangyang;HUANG Shengdong;PAN Dong;HUANG Guiren;WANG Yu;CHANG He;PU Yue(Faculty of Land Resource Engineering,Kunming University of Science and Technology,Kunming,Yunnan 650093,China;Yunnan Geological Engineering Survey and Design Research Institute Limited Company,Kunming,Yunnan 650041,China;Yunnan Key Laboratory of Geohazard Forecast and Geoecological Restoration in Plateau Mountainous Area,Kunming,Yunnan 650216,China;Key Laboratory of Geohazard Forecast and Geoecological Restoration in Plateau Mountainous Area,MNR,Kunming,Yunnan 650216,China;Yunnan Institute of Geo-Environment Monitoring,Kunming,Yunnan 650216,China)

机构地区：[1]昆明理工大学国土资源工程学院,云南昆明650093 [2]云南地质工程勘察设计研究院有限公司(一水),云南昆明650041 [3]云南省高原山地地质灾害预报预警与生态保护修复重点实验室(筹),云南昆明650216 [4]自然资源部高原山地地质灾害预报预警与生态保护修复重点实验室,云南昆明650216 [5]云南省地质环境监测院,云南昆明650216

出　　处：《中国岩溶》2024年第6期1327-1340,共14页Carsologica Sinica

基　　金：国家自然科学基金“磷石膏渣场对单斜构造岩溶-裂隙含水层地下水污染影响机理研究”(42267063)。

摘　　要：腾冲火山群面积广、喷发类型齐全,是中国最年轻的火山区之一,研究其地下水系统特征是进行污染机制分析与评价的基础。文章从地质结构、水文地质特征入手,归纳总结研究区地下水系统、含水层流动特征,采用单因子分析法对所采集的39组水样进行分析,采用DRASTIC模型,对研究区进行地下水脆弱性评价。结果表明:研究区为石头山北东侧山间谷地、南底河沟谷、明朗河河谷形成的河间地块,主要接受花岗岩裂隙水、风化裂隙水以及断裂构造带裂隙水的入渗补给,最终排泄于坝派大泉;系统结构为成因及性质差异明显的含、隔水层(带)交互多层结构与断裂、断块和裂隙储水构造叠加形成的空间组合结构,复杂性突出。研究区内低脆弱性地区、中等脆弱性地区、高脆弱性地区的占比分别为3.6%、42.1%、54.3%,表明研究区地下水脆弱性整体偏高,水质相对较差的为Ⅲ、Ⅳ的水样点多分布在脆弱性中等与较高区域,表明地下水脆弱性评价结果基本可靠。The Tengchong volcanic group encompasses a vast area and exhibits a diverse range of eruption types.It is one of the youngest volcanic areas in China.Studying the characteristics of its groundwater system is the basis for analysis and evaluation of pollution mechanisms.Ma'anshan exhibits typical genetic and morphological characteristics in the Tengchong volcanic group.The volcanic cones and craters of Ma'anshan are relatively complete.Because the lava flows exhibit no weathered layers,Ma'anshan retains the geomorphological characteristics of the volcanos with the most recent eruption.It is dated at the Late Pleistocene or Holocene.The boundary of the groundwater system is relatively clear.Starting with the geological structure and hydrogeological characteristics of Ma'anshan area,this paper summarized the boundary characteristics of groundwater system,aquifer system characteristics,aquifer flow characteristics,and characteristics of groundwater recharge and drainage in the study area.The single factor analysis was conducted to evaluate 39 groups of water samples collected.Combined with on-site investigations,pollution sources,pollution mechanisms were explored and the groundwater vulnerability of the study area was evaluated through DRASTIC model.The results show as follows.(1)The Ma'anshan area is located in the groundwater system of Bapaidaquan,bounded by the Shitoushan underground watershed at the northeast,by the groundwater barrier on the right bank of the Nandi river at the southeast,and by the recharge boundary of the Minglang river valley at the west.The Ma'anshan area constitutes an inter-river landmass composed of the Minglang river,the Nandi river,and north-east oriented catchment valley,and mainly receives infiltration and recharge from granite fissure water,weathered fissure water and fissure water from fractured structural zones.(2)Under the strong tectonic movement and volcanic eruption,the groundwater system exhibits a complex structure and changeable hydrodynamic properties.The water-collecting c

关 键 词：腾冲火山群 地下水系统特征 单因子分析法 地下水脆弱性评价 

分 类 号：P641.8[天文地球—地质矿产勘探]