河套灌区耕地质量评价与建模——以内蒙古五原县为例
Evaluation and modeling of cultivated land quality in the Hetao irrigation district—a case study of Wuyuan County,Inner Mongolia
游泽威 1杜清运 2任福 2周晓艳 1何红艳 3高杰1
作者信息
- 1. 武汉大学资源与环境科学学院,武汉 430079
- 2. 武汉大学资源与环境科学学院,武汉 430079;武汉大学地理信息系统教育部重点实验室,武汉 430079;自然资源部数字制图与国土信息应用重点实验室,武汉 430079;地球空间信息技术协同创新中心,武汉 430079
- 3. 内蒙古自治区测绘地理信息中心,呼和浩特 010020
- 折叠
摘要
针对当前耕地质量评价模式时间成本高、难以快速应用的问题,该文探究了耕地质量大尺度、高效率分析的新方法,基于PSR理论框架,使用高分系列遥感影像等数据,采用三调耕地图斑作为评价单元,使用特尔斐法、层次分析法、加权求和法进行指标确权和耕地质量评价分级,并在ArcGIS中构建了五原县耕地质量评价模型工具.评价结果表明五原县平均耕地等级为6.09级,主要集中在5～7级,6级耕地占比达42.39％,耕地质量大致呈现中西部高东南沿线偏低的空间分布规律.与国家利用等结果对比分析,7级、8级和13级耕地面积差评价精度达到94.29％、78.49％、100％;等级差在1级以内的耕地图斑数量和面积占比分别为54.11％和74.83％,模型评价结果较好,简化了部分外业采样和指标计算过程,可为耕地质量的评价与监测提供参考.
Abstract
In response to the problems of high time cost and difficulty in rapid application of the current cultivated land quality evaluation model,this article explores a new method for large-scale and efficient analysis of cultivated land quality.Based on the PSR theoretical framework,high-resolution series remote sensing images and other data are used,and the three tone cultivated land map spot is used as the evaluation unit.Delphi method,analytic hierarchy process,and weighted sum method are used for indicator confirmation and cultivated land quality evaluation grading.A cultivated land quality evaluation model tool for Wuyuan County is constructed in ArcGIS.The evaluation results indicate that the average cultivated land level in Wuyuan County is 6.09,mainly concentrated in levels 5～7,with grade 6 cultivated land accounting for 42.39％.The quality of cultivated land generally shows a spatial distribution pattern of high in the central and western regions and low in the southeastern regions.Compared with the results of national utilization,the evaluation accuracy of the difference in cultivated land area between levels 7,8,and 13 reached 94.29％,78.49％,and 100％,respectively;The number and area proportion of cultivated land patches with a grade difference of less than 1 level are 54.11％and 74.83％,respectively.The model evaluation results are good,simplifying some field sampling and indicator calculation processes,and providing reference for the evaluation and monitoring of cultivated land quality.
关键词
耕地质量评价/PSR理论/遥感指标/模型构建器/时空数据Key words
cultivated land quality evaluation/PSR theory/remote sensing indicators/model builder/spatiotemporal data引用本文复制引用
出版年
2024
NETL
NSTL
万方数据