地理研究 ›› 2014, Vol. 33 ›› Issue (5): 831-841.doi: 10.11821/dlyj201405003

• 论文 • 上一篇    下一篇

基于GRNN模型与邻域计算的低丘缓坡综合开发适宜性评价——以乌蒙山集中连片特殊困难片区为例

魏海1, 秦博2, 彭建1, 金鑫1   

  1. 1. 北京大学城市与环境学院, 地表过程分析与模拟教育部重点实验室, 北京100871;
    2. 国土资源部扶贫开发领导小组办公室, 北京100812
  • 收稿日期:2013-07-28 修回日期:2013-10-17 出版日期:2014-05-10 发布日期:2014-05-10
  • 通讯作者: 彭建(1976- ),男,四川彭州人,副教授,主要从事景观生态与土地利用研究。E-mail:jianpeng@urban.pku.edu.cn E-mail:jianpeng@urban.pku.edu.cn
  • 作者简介:魏海(1989- ),男,山西平定人,硕士研究生,专业方向为景观生态与土地利用。E-mail:hwei@pku.edu.cn
  • 基金资助:
    国土资源部公益性行业科研专项经费课题(201311001-2)

Evaluation on comprehensive exploitation suitability of low-slope hilly land based on GRNN model and neighborhood calculation:A case study ofWumeng Mountain continuous poverty-stricken region

WEI Hai1, QIN Bo2, PENG Jian1, JIN Xin1   

  1. 1. Laboratory for Earth Surface Processes, Ministry of Education, College of Urban and Environment Science, Peking University, Beijing 100871, China;
    2. Office of Poverty Alleviation and Development, Ministry of Landand Resources, Beijing 100812, China
  • Received:2013-07-28 Revised:2013-10-17 Online:2014-05-10 Published:2014-05-10

摘要: 土地资源是最重要的自然资源,低丘缓坡开发能够为土地资源紧张地区产业发展提供重要的资源保障,而土地开发适宜性评价则是开展低丘缓坡综合开发利用的基础性工作,其核心在于综合评定低丘缓坡未利用地开发的适宜类型及其程度。以乌蒙山集中连片特殊困难片区为例,本研究在明确界定低丘缓坡范围的基础上,构建了低丘缓坡耕地、建设用地开发适宜性评价指标体系并基于GRNN模型划分土地开发适宜性等级;重点关注集中连片土地开发的规模化效益,采用邻域算法对研究区低丘缓坡综合开发适宜性进行评价。研究结果表明,乌蒙山片区低丘缓坡土地开发潜力巨大,耕地、建设用地开发单宜区面积分别为31.37 万hm2和3.84万hm2,其中多宜区面积达1.79 万hm2;而考虑同现有用地类型及土地开发类型的空间邻接关系,基于规模效益原则综合权衡,多宜区中0.84 万hm2更适宜开发为耕地,0.69 万hm2更适宜用于建设用地开发,0.26 万hm2因空间孤立而不作为土地开发区;综合开发适宜性评价确定耕地、建设用地开发区面积分别为27.68 万hm2和2.21 万hm2。研究结果对于乌蒙山片区低丘缓坡综合开发具有重要的实践指导意义。

关键词: 低丘缓坡综合开发, 土地适宜性评价, GRNN模型, 邻域计算

Abstract: Land is one of the most important natural resources. The exploitation of low-slope hilly land could provide the basic resource and support for industrial development in areas of land shortage. Evaluation on the land exploitation suitability is the fundamental work of planning and utilizing low-slope hilly land. It focuses on the types and grades of unused land in a region. After redefining the range of low-slope hilly land according to the physical features of Wumeng Mountain continuous poverty-stricken region, the article selected suitability evaluation indicators of arable and constructive land exploitation and then built the index system. The GRNN model was used to evaluate the grades of land exploitation suitability. What's more, it placed emphasis on the scale benefit of contiguous land exploitation and evaluated the comprehensive exploitation suitability of low-slope hilly land using neighborhood calculation. The results showed that it is of great potential to exploit low-slope hilly land in the study area. There are 313,700 and 38,400 hectares of land to be exploited as arable and construction lands respectively. However, up to 17,900 hectares of land are suitable for more purposes than one. Based on the principle of scale benefit and taking the adjacency relation with current land use and exploitation into account, it is believed that 8,400 hectares of land are more suitable to be arable land, 6,900 hectares to be construction land and 2,600 hectares not to be exploited due to the spatial isolation. Evaluation of comprehensive exploitation suitability determined that 276,800 and 22,100 hectares of land could be exploited to be arable and construction lands. The results could be significant guidance for comprehensive exploitation of low-slope hilly land in Wumeng Mountain region.

Key words: comprehensive exploitation of low-slope hilly land, land suitability evaluation, Generalized Regression Neural Network (GRNN), neighborhood calculation