GIS辅助下的城市土地集约利用评价——以黄三角城市群为例

Evaluation on Urban Land Intensive Utilization Based on GIS ——A Case Study of Yellow River Delta City Group

为了研究县域的城市土地集约利用情况,选择开发较晚但代表性强的黄河三角洲城市群为研究区域,结合该研究区域的特点,采用改进的层次分析法,从土地投入水平、土地利用强度、土地产出效益和土地利用生态环境质量4个层面,对黄三角城市群的19个县(市、区)的土地集约利用情况进行了评价和分析,并在GIS的辅助下,绘制了这19个区(县)的土地集约利用程度专题图。结果显示:广饶县的综合评价分值最高,沾化县综合评价分值最低,分别为63.4539、8.6519;在土地投入水平上,广饶县最高,利津县最低,分别为88.3224、5.7364;在土地利用强度上,寿光市最高,河口区最低,分别为83.4258、3.7468;在土地产出效益上,广饶县最高,沾化县最低,分别为89.0062、1.9548;在土地利用生态环境质量上,莱州市最高,沾化县最低,分别为94.0085、11.9175。由此看出,黄三角城市群的城市土地集约利用水平整体偏低,县(市、区)之间差异较大,相关部门应结合各地区土地利用中存在的问题,给予针对性提高。

In order to study the status of intensive use of county urban land, the author took the Yellow River Delta City Group as the study area, which was developed late but representative, then based on the characteristics of the study area, evaluated and analyzed the condition of urban land intensively utilizing of the 19 districts from land input level, land use degree, land output efficiency and land eco-environment quality by improved analytic hierarchy process and then drew the thematic map of the degree of land intensive use of thel9 districts （counties） by GIS. The result showed that： Guangrao County＇s comprehensive evaluation scores was 63.4539 and the highest, Zhanhua County was 8.6519 and the lowest. On land input level, Guangrao County was the highest and Lijin County was the lowest, the scores were 88.3224 and 5.7364, respectively. On land use intensity, Shouguang City was the highest and Hekou District was the lowest, the scores were 83.4258 and 3.7468, respectively. On land output efficiency, Guangrao County was the highest and Zhanhua County was the lowest, the scores were 89.0062 and 1.9548, respectively. On land eco-environment quality, Laizhou City was the highest and Zhanhua County was the lowest, the scores were 94.0085 and 11.9175, respectively. Thus, it was concluded that, not only was the urban land intensive utilization level of Yellow River Delta Area low overall, but the difference between each city was significant. So, according to the problem in land using, some suggestions should be put forward to improve urban land intensive utilization.