GIS技术支持的土地资源可持续利用度评价

Sustainable Utilization Evaluation of Land Resource Based on GIS

将土地生态系统作为复合的大系统,结合研究区域土地资源可持续利用的实际情况,确立了环境支撑度、社会经济可行度、土地资源退化度以及资源支撑度四个集成指标,以及水源涵养支撑度、生物多样性维护支撑度、经济发展水平、区域人口密度、区位优势度、潜在地质危害危险性、土壤侵蚀敏感性、土地资源可利用度八项基础指标的多级别比较完整的指标体系。通过各集成指标模型的相互关系及其对目标层的贡献作用,在全网格技术的支持下,建立了土地资源可持续利用度指数模型。以山西省天镇县为研究对象,对集成指标指数模型与技术方法进行了实例研究,天镇县实际土地资源可持续利用状况与此模型的评价结果基本吻合,结果表明该模型与技术方法是切实可行的。

Combined with the actual situation of the sustainable utilization of land resources in the study area,taking the land ecological system as a composite system and according to the destination layer-the criterion layer-the index layer＇s multi-layer hierarchy,the integrated index system is constructed by four integrated indexes of socio-economic feasibility,environmental support degree,resource support degree and land resource degradation degree and a number of other basic indexes for the first time.Through the analysis of the basic indexes of the internal relations,interaction rules and the effect of the integration index factors,the authors established eight basic element index models,such as the regional population density model,the economic development level model,the location advantage model,the water conservation supporting model,the biodiversity conservation support model,the land resources exploitation model,the soil erosion sensitivity model and the potential risks of geological disasters.The sustainable land use degree index model ultimately is established through a comprehensive analysis of the interface between the models and theirs contribution to the overall goal of the role.Based on the index system on the evaluation of sustainable land use and the related models,and selecting Tianzhen county in Shanxi province as the research object,the authors used the corresponding technical methods to assess the sustainable utilization of land resource of Tianzhen county.The research results had a good alignment with the practical status.It not only showed the correctness and operability of the models and the methods,but also provided certain scientific evidence and technical assistance for the study of ecological environmental protection,land resource planning and the industrial layout.