丘陵山区土地利用冲突评价及调控优化

开展丘陵山区土地利用冲突评价可为土地利用调控优化与空间管控提供理论依据与实践支撑.以重庆市江津区2009年和2016年两期土地利用数据为例,运用景观生态学风险评价方法测算土地利用冲突综合指数,对冲突指数进行空间自相关分析,最后提出相应的土地利用调控优化策略.结果表明:1)土地利用冲突等级数量从多到少依次为稳定可控、一般冲突、中度冲突、重度冲突,冲突等级空间格局呈现"一江一河三区"集中连片的分布规律. 2)江津区不同海拔下的土地利用冲突呈现出规律变化特征,海拔越高,冲突程度越小,冲突地类随冲突程度发生相应变化. 3)江津区土地利用冲突指数全局的正相关性有统计学意义, 2016年热点区与冷点区较2009年都有所增加,集聚态势随着时间推移进一步加强. 4)基于江津区不同海拔下的土地利用冲突等级,提出3种土地调控优化策略,引导土地利用空间协调发展,提高区域可持续发展水平.

Evaluation of Land Use Conflicts in Hilly and Mountainous Areas and Optimization of Their Control

Evaluation of land use conflicts in hilly and mountainous areas may provide theoretical basis and practice support for land use optimization and space control. In this paper, the land use data of Jiangjin district of Chongqing in two periods is used as an example, and the comprehensive index of land use conflict is constructed based on the PSR (perfectly stirred reactor) model and the landscape ecological risk assessment method. Spatial autocorrelation analysis is made of the conflict index and, finally, a corresponding land use regulation and optimization strategy is proposed. The results are as follows. The grades of land use conflicts appear reducing as stable-in-control, slight conflict, moderate conflict, high conflict, and their spatial pattern presents a concentrated "two rivers-three groups" distribution. The land use conflicts at different altitudes of Jiangjin district show a regular variation:the degree of conflict diminishes with higher altitude, and the type of land use varies with the degrees of conflict. There is a significant positive correlation between the indexes of land use conflict in Jiangjin district. The number of "cold spot" and "hot spot" in 2016 is more than in 2009, and the agglomeration situation has been further strengthened over time. This paper, based on land use conflict level of different elevations of Jiangjin district, proposes three land use regulation and optimization strategies to guide the coordinated development of land use space and improve the level of regional sustainable development.