项目名称： 宁夏中部干旱带土地利用/覆被变化对区域蒸散及土壤水分的影响

项目编号： No.41501234

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 地质学

项目作者： 刘文娟

作者单位： 宁夏大学

项目金额： 20万元

中文摘要： 本课题以宁夏中部干旱带为研究区域，选取该研究区近二十年来不同时期遥感资料，按土地利用/植被类型进行遥感数据解译，分析禁牧十年植被的恢复情况。通过对三种遥感蒸散模型的比较(单层模型，双层模型，温度植被关系模型)，建立宁夏中部干旱带最佳遥感蒸散模型,获得遥感信息反演的蒸散时空变异结果。在以上基础上分析土地利用/植被覆盖影响蒸散的基本规律；探讨干旱带土地利用/覆被变化对区域水循环过程的影响，从而揭示土壤、植被和水之间的相互作用关系。研究成果对宁夏中部干旱带退化生态系统的植被恢复具有重要的实际意义，同时为评估该区国家生态调控政策的实施效果提供科学依据。

中文关键词： 蒸散；遥感监测；土壤水分；土地利用

英文摘要： This study assesses the effects of land-use/land-cover (LULC) change on regional evapotranspiration and drought in arid regions of central Ningxia province using remote sensing data of different periods over the past nearly two decades. Remote sensing images are interpreted by considering land-use/vegetation type, in order to analyze the situation of vegetation rehabilitation upon prohibited grazing over the past decade.By the comparative analysis of three remotely sensed evapotranspiation model:(single-layer,double-layer and TS-NDVI), to establish a optimal remotely sensed evapotranspiration model for the study area and obtain information on spatiotemporal variability of evapotranspiration level by remote sensing retrieval. Based on the above,the basic laws of LULC influencing evapotranspiration level are analyzed, and the effects ofLULC change on regional water circulate process regional evapotransipiration in arid regions are explored. Thus revealing the relationship among soil, vegetation and waterin the study area.The results are of practical significance to vegetation rehabilitation in degraded ecosystems in arid regions of central Ningxia, which provide a rational reference for assessing the implementation effect of national ecological control policy in local regions.

英文关键词： Evapotranspiration;remote sensing monitor;soil moisture;land use