Geostatistical analysis on multi-scale variations of soil salinity in the Yellow River Delta
In order to explore the distribution of soil salinity and the reasons for its variation in the Yellow River Delta of China, a field survey was conducted at sampling intervals of 0.04, 0.2, 1 and 6 km. These samples were analyzed in the lab to find out soil total salt, organic matter and pH value. Six other environmental factors (including elevation, slope gradient, soil texture, land use type, micro-geomorphology and depth of water table) were supported by spatial database. Based on statistical and geostatistical procedures, the results show that the variations of soil salinity have three scales and are influenced by different environmental factors. At a narrow scale (sampling intervals are 0.04 and 0.2 km), the soil salinity has small spatial dependence, because it is mainly influenced by pH value which had no structure; at a broad scale (sampling interval is 6 km), the distributions of salinity show a strong structure, because they are impacted by elevation and land use type which have high spatial dependence.
environmental factors multiple scales soil salinity spatial dependence Yellow River Delta
Hong Wang Gaohuan Liu
College of Hydrology and Water Resources Hohai University Nanjing, China 210098 Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Science, CAS Beij
国际会议
上海
英文
4669-4673
2008-05-16（万方平台首次上网日期，不代表论文的发表时间）