Ecological corridor is an important means to maintain the stability of watershed ecosystem and enhance the ecological sustainability of watershed. The layout of ecological corridor can reduce the harm of landscape fragmentation caused by the rapid development of cities, especially in the arid area of Loess Plateau, which is of great significance to strengthen the connectivity of ecological patches and restore the service function of ecosystem. In this paper, taking Sanshui River Basin in Xunyi as the research object, from the perspectives of production, life and ecology, based on the landscape ecology research paradigm of “patch-corridor-matrix”, the ecological source is determined, the ecological corridor is identified and constructed by the method of overlapping ecosystem services and ecological sensitivity, and finally the spatial structure of ecological corridor network in Sanshui River Basin is obtained. The results show that 65 core ecological patches can be selected as key ecological sources in Sanshui River Basin. It is identified that 75 ecological corridors form an ecological corridor layout mode of “green corridors are coherent and loops are interconnected”; According to the layout of ecological corridor, the spatial structure of ecological corridor network can be formed as “one heart, one vertical and three horizontal”. The research can improve the ecological stability of Sanshui River Basin, promote the construction of ecological civilization in Sanshui River Basin, and provide scientific basis for the optimization of rural ecological space in small watershed scale.

生态走廊是维持流域生态系统稳定，增强流域生态可持续性的重要手段。生态走廊的布局可以减少城市快速发展特别是在黄土高原干旱地区引起的景观破碎化的危害，这对于加强生态斑块的连通性和恢复生态系统的服务功能具有重要意义。本文以旬邑三水流域为研究对象，从生产，生活和生态学的角度，以“斑块走廊矩阵”的景观生态学研究范式为基础，确定了生态来源，建立了生态走廊。通过重叠的生态系统服务和生态敏感性的方法进行识别和构建，得到三水河流域生态走廊网络的空间结构。结果表明，三水流域可以选择65个核心生态斑块作为重点生态源。确定75条生态走廊形成了“绿色走廊连贯，环环相扣”的生态走廊布局模式；根据生态走廊的布局，生态走廊网络的空间结构可以形成为“一心一竖三横”。该研究可提高三水流域的生态稳定性，促进三水流域的生态文明建设，为小流域规模化农村生态空间优化提供科学依据。结果表明，三水流域可以选择65个核心生态斑块作为重点生态源。确定75条生态走廊形成了“绿色走廊连贯，环环相扣”的生态走廊布局模式；根据生态走廊的布局，生态走廊网络的空间结构可以形成为“一心一竖三横”。该研究可提高三水流域的生态稳定性，促进三水流域的生态文明建设，为小流域规模化农村生态空间优化提供科学依据。结果表明，三水流域可以选择65个核心生态斑块作为重点生态源。确定75条生态走廊形成了“绿色走廊连贯，环环相扣”的生态走廊布局模式；根据生态走廊的布局，生态走廊网络的空间结构可以形成为“一心一竖三横”。该研究可提高三水流域的生态稳定性，促进三水流域的生态文明建设，为小流域规模化农村生态空间优化提供科学依据。确定75条生态走廊形成了“绿色走廊连贯，环环相扣”的生态走廊布局模式；根据生态走廊的布局，生态走廊网络的空间结构可以形成为“一心一竖三横”。该研究可提高三水流域的生态稳定性，促进三水流域的生态文明建设，为小流域规模化农村生态空间优化提供科学依据。确定75条生态走廊形成了“绿色走廊连贯，环环相扣”的生态走廊布局模式；根据生态走廊的布局，生态走廊网络的空间结构可以形成为“一心一竖三横”。该研究可提高三水流域的生态稳定性，促进三水流域的生态文明建设，为小流域规模化农村生态空间优化提供科学依据。