基于地理格网的韩城市土地生态安全评价  

Evaluation of Land Ecological Security in Hancheng Based on Geographic Grid

作　　者：夏积德[1] 李俊锋[2] 齐养周 XIA Jide;LI Junfeng;QI Yangzhou(Yangling Vocational and Technical College,Yangling Shanxi 712100,China;Shaanxi Bureau of Surveying,Mapping and Geoinformation,Xi'an 710054,China;Zhouzhi Water Supply Bureau,Zhouzhi Shanxi 710400,China)

机构地区：[1]杨凌职业技术学院,陕西杨凌712100 [2]陕西测绘地理信息局,陕西西安710054 [3]周至县水务局,陕西周至710400

出　　处：《陕西农业科学》2021年第4期97-101,共5页Shaanxi Journal of Agricultural Sciences

基　　金：杨凌职业技术学院科学研究基金计划项目“基于遥感和GIS技术的黄土高原水土流失防治成效研究”(A2019026)。

摘　　要：为客观评价韩城市土地生态安全,本文借助遥感ENVI软件、GIS软件,结合PSR模型选取13个生态安全评价指标,采用层次分析法确定权重,利用生态安全综合评价模型对韩城市土地生态安全进行分级并评价。结果表明韩城市土地生态安全指数为0.211489~0.678176,整体土地生态安全水平良好,局部呈现不安全状况。其土地生态安全存在明显的空间分异特征,呈现环状布局,从中心向四周土地生态安全等级越来越高。乡镇土地生态安全中,板桥镇状况最好,桑树坪镇次之,新城办与金城办土地生态安全状况较差。In order to objectively evaluate the land ecological security in Hancheng,the remote sensing ENVI software,GIS software and PSR model were used to select 13 ecological security evaluation indexes,AHP was used to determine the weight,and comprehensive ecological security evaluation model was used to grade and evaluate the land ecological security in Hancheng city.The results showed that the land ecological security index in Hancheng was 0.211489~0.678176,the overall land ecological security level was good,but it was unsafe in some parts.Its land ecological security had obvious spatial differentiation characteristics,showing a circular layout,and the land ecological security level from the center to the surrounding areas was getting higher and higher.The land ecological security in the township of Banqiao was the best,Township of Sangshuping was the next to it,Xincheng and Jincheng areas were the worst.

关 键 词：地理格网 土地生态安全评价 韩城 

分 类 号：S154.1[农业科学—土壤学]