基于网格划分的宜兴市区滨水区可达性评价

城市滨水区可达性不仅仅是空间距离的阻隔，还包括人们对滨水空间的需求及滨水区自身对公众的吸引力。依据潜能模型的概念，选取人口密度、滨水区综合质量和以土地利用表达的交通作为评价因子，借助ArcGIS93软件，建立了基于网格划分的滨水区可达性计算模型。该模型通过对研究区域进行等距网格划分以及定量计算网格内的人口密度、最小阻力成本和滨水区综合质量来进行滨水区可达性的定量评价。运用该模型评价了宜兴市中心城区居民至各滨水区的可达性水平，发现各滨水区平均可达性水平存在明显差异，最高的是团氿，最低的是蠡河；对每个滨水区而言，可达性从空间上均呈现出以滨水区为中心由内向外递减的趋势。评价结果可为城市滨水区合理建设格局的制定和居民享用滨水区的公平性提供决策参考

ASSESSMENT OF YIXING URBAN WATERFRONT ACCESSIBILITY BASED ON GRIDS PARTITION

Accessibility of urban waterfront not only reflects the resistance of spatial distance,but also represents waterfront attraction and the demands on waterfront service.It is affected by the surrounding quality of the waterfront,population density,land use and the traffic condition.By taking account of the above influential factors and applying the concept of potential model,a model is put forward to evaluate the accessibility of urban waterfront based on grids partition.The model partitions the area equidistantly,computes the population distribution density,minimum resistance cost and comprehensive quality of the waterfront based on Arc GIS93 platform.The accessibility of each waterfront in Yixing central city is evaluated.It may offer help to make determination when the waterfront is designed and constructed