区域农业景观视觉资源评价——以滦县为例

农业景观是中国重要的乡村景观资源，为了有效利用、建设和规划景观资源，笔者以滦县为案例，通过视觉质量和视觉敏感度对研究区域进行综合评价。视觉质量以VRM系统为基础从地貌、植被、水体、色彩、毗邻风景、视觉愉悦度等6个指标进行了评价；视觉敏感度选择相对坡度、相对视距和可视频率作为评价指标进行评价。将两种评价结果利用GIS系统等权重叠加，用自然断点法将视觉资源分为4个等级，Ⅰ级占总面积43.65%、Ⅱ级为37.21%、Ⅲ级为15.17%、Ⅳ级为3.97%。结果表明：滦县总体视觉资源较好，但中部一些乡镇景观视觉资源有待提高。

Visual Resource Evaluation of Regional Agricultural Landscape——A Case Study of Luan Country

Agricultural landscape is the vital part of Chinese rural landscape resources. In order to make full use and plan landscape resources as well as build, the author took Luan Country as an example. Conclusively evaluate the study area by visual quality and visual sensitivity. Visual quality based on VRM systems that appraise on landform, vegetation, water, color, adjacent scenery and visual pleasure degrees six indicators. Visual sensitivity selected relative slope of landscape, relative distance of landscape, the visual probability of landscape as evaluation indicators. Weighted superposition two evaluates results by GIS system and so on. Through natural breaks divided visual resource into four grades. Grade I accounting 43.65% of total area, Grade Ⅱ accounting 37.21%, Grade Ⅲ accounting 15.17%, Grade Ⅳ accounting 3.97%. The results showed that Luan Country had a better overall visual resource, but a number of towns in the central that visual landscape resources need to be improved.