干旱区研究2025，Vol.42Issue(3)：431-444,14.DOI:10.13866/j.azr.2025.03.04
基于遥感的土壤盐渍化风险评估及其演变规律
Remote sensing-based risk assessment of soil salinization and its change over time
摘要
Abstract
Assessment of the risk of soil salinization and associated monitoring are particularly significant for the precise management of saline soil and to ensure sustainable agricultural development.Taking Dali County as a fo-cus,this study used the CRITIC weighting method to construct a comprehensive salt index,comprehensive soil index,comprehensive vegetation index,and comprehensive geographical index based on the soil salt driving mechanism and process,combined with the characterized soil salt state.It also used the analytic hierarchy pro-cess-entropy combined weight method to construct a model for assessing the risk of soil salinization.Monitoring revealed that the risk of soil salinization in Dali County is mainly mild,although the level of salinization risk in 2021 was relatively high.Meanwhile,the total area with salinization risk that is moderate or above peaked in the last four years,accounting for approximately 50%of the total.From 2020 to 2023,the changes in the level of soil salinization risk mainly involved risk escalation,and the stability of the soil salinization risk level around the Yel-low River Basin in the east was relatively poor.Cultivated land is the main land cover type in the warning zone and restoration zone within the saline soil management zoning and both warning zone and restoration zone are mainly distributed in the eastern part of Dali County.Upon efforts to confirm the findings by determining the cor-relations between the soil salinization risk assessment results and the soil conductivity samples measured in the same period,there was a significant strong correlation between them.The model for assessing the risk of soil sali-nization can effectively characterize the spatiotemporal evolution of soil salinization in Dali County.In addition,the increased risk of soil salinization was shown to be mainly associated with multiple factors such as concentrat-ed heavy rainfall,rising temperatures,rising groundwater levels,increased surface evapotranspiration,and agri-cultural production.Therefore,assessment of the risk of soil salinization in Dali County can provide a theoretical and scientific basis and data support for the precise and efficient management of saline soils and effectively pro-mote the adjustment of agricultural production structure and achieve ecologically sustainable agricultural develop-ment.关键词
土壤盐渍化/遥感/大荔县/信息演变图谱/组合权重法Key words
soil salinization/remote sensing/Dali County/information evolution map/combined weight method引用本文复制引用
强欣欢,高文文,王博,谭剑波,赵旦,闫世勇,隋立春..基于遥感的土壤盐渍化风险评估及其演变规律[J].干旱区研究,2025,42(3):431-444,14.基金项目
山西省基础研究计划青年项目(202203021212273) （202203021212273）
中国地质调查局地质调查项目(DD20220882,KC20230013) （DD20220882,KC20230013）
