干旱区生态环境知识资源中心(Arid): 盐渍化灌区土壤盐分的时空变异特征及其与地下水埋深的关系

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	盐渍化灌区土壤盐分的时空变异特征及其与地下水埋深的关系
其他题名	Spatio-temporal variability of soil salinity and its relationship with the depth to groundwater in salinization irrigation district
	管孝艳 1; 王少丽 1; 高占义 1; 吕烨 1; 付小军 2
来源期刊	生态学报
ISSN	1000-0933
出版年	2012
卷号	32 期号:4 页码:1202-1210
中文摘要	土壤盐分空间变异特征和地下水埋深状况是指导灌区合理用水和防治土壤盐碱化的重要依据。运用经典统计学和地质统计学方法,结合GIS技术,分析了河套灌区沙壕渠灌域020 cm、2040 cm、4060 cm土壤EC值的空间变异特征及地下水埋深对土壤盐分分布的影响。结果表明:沙壕渠灌域土壤盐分Cv值在不同灌溉时期和不同土壤深度均大于36%,表现为强变异特征;各灌水时期和不同土壤深度土壤EC值均表现为中等强度的空间自相关性,表层020 cm土壤空间自相关程度最高;秋浇前不同层次土壤EC值的空间分布在灌域内从南到北呈增大趋势,秋浇后土壤含盐量的高值区在西北部或东北部;土壤盐分受地下水埋深影响显著,灌域内地下水埋深南深北浅,土壤盐分随地下水埋深的增大而减小,二者之间满足指数关系。因此,应采取合理措施控制地下水埋深,防止区域土壤盐渍化加剧。
英文摘要	The spatial distribution of soil salinity and the depth to groundwater are of great importance in guiding rational irrigation water use and controlling soil salinization.The secondary saline-alkalization problem of soil is quite severe in Hetao irrigation,Inner Mongolia due to increasing rise of groundwater table caused by unsuitable irrigation method and incomplete drainage system,in particular under the specific arid and semi-climatic and hydrogeological conditions.This has become one of the major constraints to local agricultural and social-economic development.In this paper,the Shahaoqu irrigation district was chosen as an example for testing the spatial variability of soil salinity and its relationship to depth to groundwater.Aiming at the complexity and spatial variability of the dynamic soil water and salinity in Shahaoqu irrigation district,the classical statistics and geostatistics integrated with GIS were used in this study to analyze the spatial variability of soil EC values in 020cm,2040cm and 4060cm depths and the effect of the depth to groundwater on soil salinity distribution in Shahao irrigation area of Hetao irrigation district.The results showed that the soil EC′s Cv values were all more than 36% in Shahao irrigation area and had strong spatial variability in different irrigation periods and different soil depths,Analysing the EC data with GS+ software,it was found that the spherical model,gaussian model and exponential model were perfect in fitting Semi-variogram of soil EC values,the soil EC data had moderate spatial correlation,and the spatial autocorrelation of soil EC values reached the highest in 020cm.After finishing the Kriging map of salt in three soil layer respectively,it was found that the spatial distribution of soil EC values was in a trend of increase from south to north in different soil depths before autumn irrigation,and the high soil EC values were in northwest or northeast areas after autumn irrigation.Soil salinity is significantly affected by the depth to groundwater in Hetao irrigation district,and the detpt to groundwater is a decisive factor affecting soil salization.From the Kriging map of the depth to groundwater,it was found that the depth to groundwater was deep in the south and shallow in the north,and it reached the deepest 2.71m on the average before autumn irrigation.However,the average depth to groundwater reached the shallowest 0.75m after autumn irrigation due to groundwater recharge from irrigation water.Soil salinity decreases with the increase of the depth to groundwater,they conform to exponential relations.In order to prevent the soil salinity from accumulating in the root layer,controlling the depth to groundwater is an important fractor for controlling soil salinization in Hetao irrigation district.Therefore,some reasonable irrigation measures and agriculture technology measures should be adopted to control the depth to groundwater,and thereby to prevent the aggravation of soil salinization in this irrigation area.This study could provide lots of scientific support for soil salinity treatment and improvement,agricultural planning and adjustment,and irrigation and drainage engineering planning in the future.
中文关键词	盐渍化灌区 ; 土壤盐分 ; 时空变异 ; 地下水埋深
英文关键词	salinization irrigation district soil salinity spatio-temporal variability the depth to groundwater
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:4446456
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/228435
作者单位	1.中国水利水电科学研究院, 流域水循环模拟与调控国家重点实验室;;国家节水灌溉北京工程技术研究中心, 北京 100038, 中国; 2.内蒙古河套灌区解放闸灌域沙壕渠试验站, 陕坝, 015400
推荐引用方式 GB/T 7714	管孝艳,王少丽,高占义,等. 盐渍化灌区土壤盐分的时空变异特征及其与地下水埋深的关系[J],2012,32(4):1202-1210.
APA	管孝艳,王少丽,高占义,吕烨,&付小军.(2012).盐渍化灌区土壤盐分的时空变异特征及其与地下水埋深的关系.生态学报,32(4),1202-1210.
MLA	管孝艳,et al."盐渍化灌区土壤盐分的时空变异特征及其与地下水埋深的关系".生态学报 32.4(2012):1202-1210.