资源科学 ›› 2019, Vol. 41 ›› Issue (4): 766-774.doi: 10.18402/resci.2019.04.13

• 土地资源 • 上一篇    下一篇

基于道路网络分析技术的耕地细碎化测度模型改进

葛玉娟, 赵宇鸾   

  1. 贵州师范大学地理与环境科学学院,贵阳 550001
  • 收稿日期:2018-08-29 修回日期:2018-12-09 发布日期:2019-04-25
  • 通讯作者: 国家自然科学基金项目(41771115); 贵州省科技计划项目(黔科合平台人才[2017]5726号); 2015年贵州省“千”层次创新型人才资助项目(111-0317003)
  • 作者简介:葛玉娟,女,内蒙古赤峰人,硕士研究生,主要研究方向为土地资源利用与管理。E-mail:986956266@qq.com

Improvement of farmland fragmentation measurement model based on road network analysis

GE Yujuan, ZHAO Yuluan   

  1. College of Geography and Environmental Science, Guizhou Normal University, Guiyang 550001, China
  • Received:2018-08-29 Revised:2018-12-09 Published:2019-04-25

摘要: 为了提高耕地细碎化测度结果的准确性,运用GIS网络分析技术改进了测度模型。首先,综述了耕地细碎化的内涵和现有测度方法不足,提出实际道路网络是耕地细碎化程度测定中不可或缺的指标。其次,依据耕地细碎化的内涵,选取基于道路网络的农户地块道路通达性指数、农户地块面积指数、农户地块形状指数3个指标,构建了新的耕地细碎化测度模型。最后,采用新模型对典型村的耕地细碎化程度进行实证分析,证实该模型的有效性,并对比分析农户到其耕作地块的直线距离与道路网络距离两种距离测度方式下的耕地细碎化差异,表明与道路网络距离相比直线距离低估了耕地细碎化水平。改进的测度模型对深化研究耕地细碎化及其对农业生产投入—产出的影响等研究具有积极意义。

关键词: 土地评价, 耕地细碎化, GIS网络分析技术, 道路通达性, 农户, 贵州省小坝村

Abstract: This study used GIS network analysis technique to improve the accuracy of an arable farmland fragmentation measurement model. It first summarized the connotation of arable farmland fragmentation and the existing measurement methods. It proposed that the actual road network is an indispensable indicator for the determination of the degree of arable farmland fragmentation. Second, according to the connotation of arable farmland fragmentation, three indicators farmer’s plot road accessibility index, farmer’s plot area index, and farmer’s plot shape index based on road network were selected, and a new arable farmland fragmentation measurement model was constructed. Finally, an empirical analysis of 206 farming households in a typical study area was carried out with the improved arable farmland fragmentation measurement model to confirm the validity of the model, and to compare the Euclidean distance between the farmhouse and the cultivated land and the road network distance. Then we compared and analyzed the difference between the farmer’s Euclidean distance to the cultivated land and the road network distance using the two distance measurement methods. Compared with the road network distance, the Euclidean distance underestimated the level of cultivated farmland fragmentation. The improved measurement model of this study has positive significance for further research on cultivated farmland fragmentation and its impact on agricultural production input-output.

Key words: land assessment, farmland fragmentation, GIS network analysis technique, road accessibility, farming household, Xiaoba Village,Guizhou Province