干旱区平原水库坝口外侧盐渍土特性及其空间变异特征  

Saline soil characteristics and spatial rariability outside dam mouth at plain reservoir in arid area

作　　者：夏倩柔[1,2] 熊黑钢[3,2] 韩茜 鲁魁锋[1,2] 

机构地区：[1]新疆大学资源与环境科学学院,乌鲁木齐830046 [2]教育部绿洲生态重点实验室,乌鲁木齐830046 [3]北京联合大学应用文理学院,北京100083 [4]新疆维吾尔自治区发展与改革委员会经济研究院,乌鲁木齐8300163

出　　处：《水资源与水工程学报》2011年第5期55-58,62,共5页Journal of Water Resources and Water Engineering

基　　金：国家自然科学基金(40771194);北京市属高等学校人才强教计划资助项目

摘　　要：运用地统计学方法对干旱区平原水库坝口外侧周围的土壤盐分、有机质、pH值的空间变异性进行了分析。结果表明:土壤总盐平均含量高于土壤盐化标准(>0.3%),并表现出由表层向底层递减的趋势。土壤有机质具有强烈的空间相关性,变异主要由内在区域性因素引起。土壤总盐和pH值均表现出中等强度的空间相关性。空间分布格局上,土壤盐分呈现出水库大坝附近含量高,离大坝越远盐分含量越低的分布规律。而有机质的空间分布与盐分的相反,即土壤有机质含量高的地方,盐分少。同时,pH空间分布格局总体上表现出盐高的地点,pH低的特点。Spatial variability of soil salinity,organic matter and pH value around the area at the mouth of reservoir dam on arid plain was analyzed by using the method of geostatistics.Results showed that total salt content is higher than the standard value by more than 0.3%,and decreases gradually from the surface to the bottom.Soil organic matter has a strong spatial correlation,variation is mainly caused by regional factors.Total salt and soil pH values showed moderate spatial correlation which is determined by the joint effects of regional factors and random factors.As for spatial distribution pattern,soil salt content is high near the dam,and the farther away from the dam the lower is the salt content.To the contrary of the spatial distribution of soil salinity,locations with high soil organic matter content,salt content is low.Furthermore,locations with high soil salt content,pH value is low.

关 键 词：土壤盐分 有机质 盐渍土空间变异 坝口外侧 

分 类 号：TV22[水利工程—水工结构工程] TU448[建筑科学—岩土工程]