县域批而未用土地的监测研究

The Monitoring of Approved but Unused Land at County Level

研究目的:为研究如何从土地管理的时间维度提高土地利用效率提供一个新的视角。研究方法:目视解译法、GIS空间分析、景观格局指数。研究结果:(1)研究区县域2006—2012年新增建设用地中共产生259宗批而未用土地,面积为515.47 hm2;(2)批而未用土地数目随时间变化波动增长,呈现集聚性、趋向性的空间分布特征;(3)市场不确定性、政策与规划调整以及土地管理脱节是产生批而未用土地的主要原因。研究结论:利用高分辨率影像目视监测批而未用土地的方法简单,对提高建设用地利用的时空效率具有积极作用。

The purpose of this research is to provide a new perspective for improving land use efficiency from the time dimension of land management, by means of analyzing spatial-temporal patterns of approved but unused land and its causes. Methods employed were visual interpretation and GIS spat ial analysis and landscape pattern indices. The results indicate that 1）regarding 2014 as the judge point and considering two years＇ normal use cycle, 259 parcels of approved but unused land are visually interpreted from the incremental construction land during 2006 to 2012. They cover 515.47 hectares and include two types of completely unused land and unused land beyond cycle; 2）the number of approved but unused land increases unsteadily over time,and it presents the characteristics of spatial clustering and tendency; 3）unstable market, adjustment in policy and planning, disjointed land management are all main reasons for such spatial-temporal patterns. It is concluded that the method of interpreting approved but unused land visually by means of high resolution images is simple and plays a positive role in promoting spatial-temporal efficiency of construction land utilization.