固原东山坡井地下水类型及水化学特征分析  

Analysis of groundwater types and hydrochemical characteristics in Dongshanpo well of Guyuan

作　　者：李自芮[1] 要利锐 丁风和 朱鹏涛[1] 余思汗 贺嘉伟 LI Zirui;YAO Lirui;DING Fenghe;ZHU Pengtao;YU Sihan;HE Jiawei(Earthquake Agency of Ningxia Hui Autonomous Region,Yinchuan 750001,China;Gas Production Plant,PetroChina Changqing Oilfield Company,Shaanxi Province 710000,China)

机构地区：[1]宁夏回族自治区地震局,银川750001 [2]长庆油田第一采气厂,陕西710000

出　　处：《地震地磁观测与研究》2023年第1期92-100,共9页Seismological and Geomagnetic Observation and Research

基　　金：宁夏自然科学基金项目(项目编号:2021AAC03485)。

摘　　要：应用水物理、水化学方法综合分析固原东山坡井的地下水类型及水化学特征,揭示其地下水运移和补给来源,以期为有效识别宁夏南部的地震前兆异常和干扰排除发挥积极作用。分析结果表明:①利用卷积回归法和频谱分析法综合判定东山坡井的地下水类型为承压水;②东山坡井及井周围水体的水化学类型分别为NaHCO_(3)型、CaHCO_(3)型;③δD、δ^(18)O测值分别为-82.51‰—-68.905‰、-11.83‰—-10.33‰,分布于大气降水线上方,说明东山坡井水体主要源于大气降水,补给高程为1.4—1.9 km,补给区平均温度为5.1℃;④东山坡井水体为东西两侧山体补给,地势更低的东北方向为其排泄方向。In this paper,we present a comprehensive analysis of the groundwater types and hydrochemical characteristics of Dongshanpo well in Guyuan using hydrophysics and hydrochemistry methods.By revealing the sources of groundwater migration and recharge,our study will contribute to effectively identifying seismic anomalies and removing disturbances in southern Ningxia.Out analysis reveals several key findings:(1)The groundwater type of Dongshanpo well is confined water comprehensively determined by convolution regression method and spectrum analysis method;(2)The hydrochemical types of Dongshanpo well and surrounding water were NaHCO3 type and CaHCO3 type,respectively;(3)The values ofδD andδ^(18)O ranged from-82.51‰to-68.905‰and-11.83‰to-10.33‰,respectively,which were distributed above the precipitation line,indicating that the Dongshanpo well was mainly recharged by precipitation.The recharge elevation ranged from 1.4 to 1.9 km,and the average temperature in the recharge area was 5.1℃.(4)The supply of the Dongshanpo well is the mountains around the east and west sides,while the northeast direction of the lower terrain is the discharge direction.

关 键 词：固原东山坡井 地下水类型 水化学特征 补给来源 

分 类 号：P641[天文地球—地质矿产勘探]