ZHANG Lechen1, CHEN Xi2, ZHANG Zhicai3
（1.Huadian Electric Power Research Institute, Hangzhou 310030, China;
2.Institute of Surface-Earth System Science, Tianjin University, Tianjin 300072, China;
3.College of Hydrology and Water Resources, Hohai University, Nanjing 210098, China）
Abstract: 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.
Key words: geostatistical analysis; autocorrelation analysis; hydrochemical characteristics; semivariogram
EARTH AND ENVIRONMENT Vol.47, No.5, Tot No.331, 2019, Page 594-600
