黄土高原半干旱区景观化集水造绿空间网络构建——以甘肃环县为例

Spatial Network Setup for Landscaping-Oriented Catchment Greening in Semi-arid Loess Plateau:A Case Study of Huan County in Gansu

在"聚居背景—聚居活动—聚居建设"的景观"三元论"的哲学基础上,风景园林这一综合学科应对黄土高原的人居环境改善产生重要的作用。文章以黄土高原东部半干旱区环县的人居环境为研究对象,从人居角度分析影响集水造绿的各类因素,从降水、坡度、坡向、河流、泉眼等自然因素以及城镇、道路、水库等人工因素的角度评价集水造绿的适宜性;以GIS技术进行数据整理与量化分级,通过综合考量确定集水造绿的优势地带等级,即适宜度分析;识别集水造绿的"节点"与"路径";规划水绿双赢的空间网络。研究证明,在引入适当人为干预的情况下,通过"基底—节点—路径"方式构建的集水造绿优势空间网络能够适应人居环境集水造绿的需求。

Philosophically based on landscape ＂Trilism＂ of ＂human settlement context---human activities---human settlement construction＂, landscaping has a very important role in improving the living environment in the Loess Plat- earl This paper, taking the human settlement context in Huan County located in semi-arid region of the east part of the Loess Platean as the research subject, tried to analyze the influencing factors to catchment greening from human settlement perspective and evaluate the suitability from the perspectives of natural factors like precipitation, slope direction, slope position, rivers and streams and springs, as well as artificial factors such as towns, roads and reser- voirs. Data processing and rating was don with GIS technology to rank the zone through suitability degree analysis, i. e. , comprehensive consideration of catchment greening and landscaping, to identify the nodes and pathways for landscaping, and to plan the spatial network for successful co-existence of water and greenness. The research proved that the catchment greening spaces established through the way of ＂base-node-pathway＂ can meet the requirements for human settlements if proper artificial intervention is introduced.