Risk analysis of mild soil salinity based on Indicator Kriging Method
In response to the high variability of soil salinity in Hetao irrigation area,the indicator Kriging is used to analyze the spatiotemporal risk changes of soil salinization.The results showed that the soil in 0～100cm soil layer of the study area belonged to mild salinity and exhibited moderate variability at different stages;The indication that the variation function conforms to the Gaussian model and has moderate spatial autocorrelation indicates that the spatial variation of soil salinity is caused by both structural and stochastic factors.The risk of mild salinity in the northern part of the study area is high and concentrated.It is recommended to adopt a comprehensive management measure mainly based on water conservancy engineering measures and supplemented by agricultural biological measures.The land use intensity in the southern region is relatively high,and artificial agricultural activities are more frequent.Field management should be strengthened to prevent soil salinity.
Hetao Irrigation Districtdrainage and drainage unitIndicator Krigingsoil salinity
万方数据
维普
