地球与环境

文章摘要

西南喀斯特流域水化学空间变异性分析

Spatial Variability Analysis of Hydrochemistry in a Southwest Karst Basin

投稿时间：2019-01-23 修订日期：2019-04-23

DOI：10.14050/j.cnki.1672-9250.2019.47.105

中文关键词: 地统计分析;自相关分析;水化学特征;半变异函数

英文关键词: geostatistical analysis;autocorrelation analysis;hydrochemical characteristics;semivariogram

基金项目:国家自然科学基金国际合作重大项目（41571130071）；国家自然科学基金项目（41571020）；国家重点研发项目（2016YFC0502602）。

作者	单位
张乐辰¹, 陈喜², 张志才³	1. 华电电力科学研究院有限公司, 杭州 310030 2. 天津大学表层地球系统科学研究院, 天津 300072 3. 河海大学水文水资源学院, 南京 210098

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中文摘要:

本文以后寨河流域为研究对象，基于地统计学分析方法，研究喀斯特地区含量较高的四种离子（HCO₃^-、Ca²⁺、SO₄^2-、Mg²⁺）的空间变异特征。结果表明：选取的离子都呈正空间自相关性，其中SO₄^2-和Ca²⁺的空间集聚作用更显著。由于离子来源和影响因素的不同，离子的自相关程度和变程范围有所不同，由C₀/（C₀+C）比值判断，HCO₃^-、Ca²⁺和SO₄^2-为中等强度空间相关，Mg²⁺表现为强相关且变程较小，结构性因素对Mg²⁺作用更为显著。离子在一定的距离内都表现为各向同性，超出该距离，受到岩性、构造、人类活动等因素的影响，则表现出了明显的各向异性特征。

英文摘要:

The Houzhai river basin, a typical small basin in the southwest China karst area, was selected to analyze spatial variabilities of four high content ions (HCO₃^-, Ca²⁺, SO₄^2- & Mg²⁺) in the karst area using the geostatistical analysis method. The research showed that these ions were positively spatially autocorrelated, especially SO₄^2- and Ca²⁺. The degree of spatial autocorrelation and the variation range of these ions were different due to different sources and influencing factors. According to the ratio of C₀/(C₀+C), HCO₃^-, Ca²⁺ and SO₄^2- were moderate spatial correlated ions and Mg²⁺ was the strong spatial correlated ion which received more significant influences of structural factors. The spatial variabilities of all ions were isotropic in a specific distance range and were affected by structural factors (e.g. lithology and regional geological structure) beyond.

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