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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+、SO42-、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SO42-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SO42-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+, SO42- & Mg2+) in the karst area using the geostatistical analysis method. The research showed that these ions were positively spatially autocorrelated, especially SO42- 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 SO42- 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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