Space-Time Variability and Prognosis of Soil Salinization in Yucheng City, China
Space-Time Variability and Prognosis of Soil Salinization in Yucheng City, China作者机构：Institute of Soil Science Chinese Academy of Sciences Nanjing 210008 （China）.
出 版 物：《Pedosphere》 (土壤圈（英文版）)
年 卷 期：2005年第15卷第6期
页 面：797-804页
核心收录：
学科分类：09[农学] 0903[农学-农业资源与环境] 090301[农学-土壤学]
基 金：Project supported by the National Natural Science Foundation of China (No 40371058) and the National Key BasicResearch Support Foundation of China (No. G1999011803)
主 题：Dempster-Shafer theory GIS kriging interpolation prognosis soil salinization
摘 要：This research used both geostatistics and GIS approach to compare temporal change of soil salt between 1980 and 2003, to analyze the spatial distribution of surface soil salt, to developed methods for predicting soil salinization potential based on recent improvements to the Dempster-Shafer theory, and to develop probability maps of potential salinization in Yucheng City, China. A semivariogram model of soil salt content was developed from the spherical model, and then employing kriging interpolation the spatial distribution of salt content in 2003 was obtained utilizing data from 100 soil sampling points. Potential salinization distribution was mapped using an approach that integrated soil data of the second general survey in 1980 in Yucheng City, which included groundwater salinity, groundwater depth, soil texture, soil organic matter content, and geomorphic maps. With the support of Dempster-Shafer theory and fuzzy set technique the factors that affected potential soil salinization were characterized and integrated; and then soil salinization was predicted. Finally a prognosis map of potential salinization distribution in the research area was obtained, with higher probability values indicating higher hazards to salinity processes. The distribution of the potential soil salinization probability was a successive surface.
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