PDF(Pubmed)
Abstract：
The South-to-North Water Diversion Project (SNWD) in China is a trans-basin water transfer project for water resource optimization that affects ecosystem services functions along its main transfer line. Exploring the effects of land-use change on ecosystem services in the headwater and receiving areas along the SNWD is conducive to improving the protection of the surrounding ecological environment. However, previous research lacks a comparative analysis of ecosystem services values (ESVs) in these areas. In this study, the land-use dynamic degree index, land-use transfer matrix, and spatial analysis method were used to comparatively analyze the impact of land-use changes on ESVs in the headwater and receiving areas of the SNWD. The results show that cultivated land was the main land use type in the receiving areas and HAER. From 2000 to 2020, CLUDD in the headwater areas was faster than that in the receiving areas. Spatially, in general, the land-use change areas of the receiving areas were larger. During the study period, cultivated land in the headwater areas of the middle route mainly transferred to water areas and forestry areas, while built-up areas mainly occupied cultivated land in the headwater areas of the east route, receiving areas of the middle route, and receiving areas of the east route. From 2000 to 2020, the ESV increased only in the headwater areas of the middle route, while the ESV in the other three sections decreased. The variation extent of ESV in the receiving areas was greater than that in the headwater areas. The results of this study have important policy significance for land use and ecological protection in the headwater and receiving areas of the SNWD in the future.
摘要：
中国的南水北调工程（SNWD）是一项跨流域调水工程，旨在优化水资源，影响其主输水线的生态系统服务功能。探索土地利用变化对SNWD沿线源头和接收区生态系统服务的影响，有利于改善周边生态环境的保护。然而,先前的研究缺乏对这些地区的生态系统服务价值(ESV)的比较分析。在这项研究中,土地利用动态程度指数，土地利用转移矩阵，采用空间分析方法比较分析了土地利用变化对SNWD源头和接收区ESV的影响。结果表明，耕地是接收区和HAER的主要土地利用类型。从2000年到2020年，上游地区的CLUDD比接收地区的CLUDD快。空间上,总的来说,接收区的土地利用变化面积较大。在学习期间,中线源头区的耕地主要转移到水域和林区，而建成区主要占用东线上游地区的耕地，中间路线的接收区域，和东线的接收区。从2000年到2020年，ESV仅在中线的上游地区增加，而其他三个部分的ESV下降。接收区ESV的变化程度大于源头区。本研究结果对未来SNWD源头和接收区的土地利用和生态保护具有重要的政策意义。
