浦阳江干流生态缓冲带的划定与构建

河流生态缓冲带(简称“缓冲带”)的划定是对河流进行生态修复与保护的重要前提。如何确定缓冲带的宽度和空间布局也是管理部门和学者们关注的热点。以浙江省金华市山溪型河流浦阳江干流为例，利用GF-2卫星影像提取河流岸线、解译河岸两侧土地利用状况，通过VFSMOD模型工具和缓冲带自然条件综合确定农田型、村落型、林草型河段的缓冲带宽度；而城镇型河段则结合城市河道蓝线来确定缓冲带宽度；最终划定浦阳江干流左右岸缓冲带总长度109.63 km，总面积2.837 km²。在此基础上，构建了试点区域上仙屋断面的缓冲带修复方案，旨在为缓冲带修复和水环境质量改善提供参考。

Delineation and construction of ecological buffer zone in the mainstream of Puyang River

The delineation of the riparian buffer zone is important for riparian buffer zone restoration. Determining width and spatial layout of the riparian buffer zone has attracted attention of the administrative departments and researchers. In this study, the mainstream of the Puyang Riverin Jinhua City, Zhejiang Province, was investigated as a case for delineation and construction of ecological buffer zone. GF-2 satellite imaging was used to extract riverbank lines and to interpret the land use status on both sides of the riverbank. Based on the VFSMOD model and the natural conditions of the riparian buffer zone, the width of the buffer zone of farmland type, village type, forest and grass type river sections were determined. For urban river sections, the width of the buffer zone was determined based on the blue line of the urban river. The total length of the buffer zone on the left and right banks of the mainstream of the Puyang River was 109.63 km and the total area was 2.837 km2. Given that, a detailed restoration plan for the riverbank ecological buffer zone of the Shangxianwu section in a typical area was proposed, aiming to provide reference and support for riverbank buffer restoration.