引用本文:邓华, 邵景安.基于人口流动和区位条件的耕地保护分区——以重庆市石柱县为例[J].西南大学学报(自然科学版),2019,41(3):40~48
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基于人口流动和区位条件的耕地保护分区——以重庆市石柱县为例
邓华, 邵景安1,2,3
1. 重庆青年职业技术学院 旅游与人文艺术系, 重庆 400712;2. 重庆师范大学 地理与旅游学院, 重庆 400047;3. 三峡库区地表过程与环境遥感重庆市重点实验室, 重庆 400047
摘要:
人口作为影响耕地保护的非稳定性要素之一,其变动对耕地保护有着极其重要的影响.本文以重庆市石柱县为例,以人口迁移率反映人口变化特征,利用熵权TOPSIS构建反映耕地区位优劣程度的指标体系,借助K-均值聚类进行合理耕地保护区的划定和差别化保护策略的安排.结果表明:①石柱县总体上以人口析出为主,人口迁移指标与常年外出务工率呈现较强的"冷热"空间集聚;②影响耕地区位优劣程度的次序从高到低依次为与居民点的距离、地块坡度、田间道路通达性、与县城距离、与乡(镇)距离、地块高程;③石柱县耕地中Ⅰ等区位条件所占面积最多,其次为Ⅲ等,占地面积最少的为Ⅳ等;从乡(镇)级尺度上看,西部的耕地区位条件好于东部,行政面积小的乡(镇)高于面积大的,边缘乡(镇)低于靠近城区的;④基于人口流动、耕地区位条件对石柱县耕地保护进行分区,并提出相应的保护措施,为本区耕地保护提供科学依据.
关键词:  人口流动  耕地区位条件  耕地保护分区  石柱县
DOI:10.13718/j.cnki.xdzk.2019.03.006
分类号:S181.3;F323.211
基金项目:重庆市基础科学与前沿技术研究重点专项项目(cstc2017jcyjB0317);重庆市教委科学技术研究项目(KJ1738462).
Cultivated Land Protection Zoning Based on Population Flow and Cultivated Land Location Conditions——A Case Study of Shizhu County, Chongqing Municipality
DENG Hua, SHAO Jing-an1,2,3
1. School of Chongqing Youth Vocational and Technical, Department of Tourism and Humanities, Chongqing 400712, China;2. School of Geography and Tourism, Chongqing Normal University, Chongqing 400047, China;3. Key Laboratory of Surface Process and Environment Remote Sensing, the Three Gorges Reservoir Area, Chongqing 400047, China
Abstract:
The population factor is one of the most unstable elements of cultivated land protection, and its changes have a very important impact on the protection of cultivated land. Taking Shizhu County of Chongqing Municipality as an example and population mobility as a reflection of the characteristics of population change, we use the entropy-weight TOPSIS method to construct an indicator system that reflects the superiority degree of a given farmland location and, finally, by means of K-means clustering, make a reasonable cultivated land protection zoning and realize differentiated farmland protection. The results show that population migration of Shizhu is mostly emigration and that the population migration indicators and the perennial migrant workers of the county present a marked "hot and cold" spatial agglomeration. The degree of influence of cultivated land location reducing as:distance from the residential site, slope of the land, field road accessibility, distance from the county seat, distance from the town, elevation of the land. In this county, the cultivated land of Location Grade I has the largest area, followed by Grade Ⅲ and others places, and Grade Ⅳ has the smallest area. On the town scale, the location of cultivated land is better in the west than in the east and that of the towns with smaller area is better than that of the towns with larger area. The location of cultivated land of the towns close to the urban area is better than that of the towns located far from it. Finally, based on population flow and cultivated land location, a zoning is made for cultivated land protection in the study area, and corresponding protection measures are proposed so as to provide a reference for the protection of cultivated land in Shizhu.
Key words:  population flow  location conditions of cultivated land  cultivated land protection zoning  Shizhu County
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