南京大学学报（自然科学版）Issue(2)：202-210,9.DOI:10.13232/j.cnki.jnju.2014.02.012
基于最小费用距离模型的高标准基本农田建设区划定方法
Zoning method of high standard primary farmland based on the least-cost distance model
摘要
Abstract
Large-scale,high quality primary farmland construction,which plays an important role in optimizing spatial distribution of farmland,improving and increasing the comprehensive utilization efficiency of farmland,promoting quality level and productive power of cropland,guaranteeing modern agriculture development,and new rural construction,is regarded as one of strategic deployment and overall arrangement and effective ways in China. However,owing to lack relative regulations and fully fledged experiences to conduct construction projects,it is very difficult for local governments to zone and construct high quality primary farmland construction.Besides,studies on how to establish suitable zones for quality facilities in primary farmland construction have not been available until now.In the theoretical circle,the traditional methods of zoning high standard primary farmland,including stacking layer with weight,logic rules dividing and integrated zoning,these methods usually pay more attention to the objectivity of data,subjective initiative and analysis of overlying layer.However,the effect of horizontal expansion among different land blocks is easy to be neglected by researchers.Considering that each land block has horizontal in-fluence on adjacent blocks,this article firstly selected social-economy circumstances,eco-agriculture environment as well as water-land resources of Guanzhong region as indexes system,and constructed a system to evaluate the resistances value during high standard primary farmland zoning by using least-cost distance model.Then it chose the first to third level cultivated land in Guanzhong region as the original surface.Finally a zoning scheme of Guandong region for large-scale,high quality primary farmland construction,which consists of prior construction areas, restricting construction areas,and forbidding construction areas,is built based on the pixel value property of least-cost distance model.Results shows that according to different regional characteristics,high-standard prime farmland in Guandong region could be divided to prior,restricting,and forbidding construction areas,and their areas proportion of construction is 14828 km2 ,31897 km2 and 2345 km2 respectively,or account for 30.22%,65.00% and 4.78% of entire region respectively.The prior construction is mainly located in Guan Zhong plain,Wei River basin,and the northeast of Luo He River.Restricting construction areas are widely distributed in the north or north’s low mountain of Guandong region.Forbidding construction areas are by and large situated in the south of Zhou Zhi county,the north of Xun Yi and Yi Jun county,or the centre of Lin You county.Furthermore,least-cost distance model is not only applicable for ecological zoning,to a certain degree,but also for high standard primary farmland zoning. Compared with integrated zoning’result,a zoning scheme resulted from least-cost distance model has an advantage in keeping the continuity of the current cultivated land.Meanwhile,this research provides a scientific basis and preliminary direction in decomposing the construction task and subordinate constructing assignment at province or municipal level.In addition,original surface and zoning threshold are vitally important to improving the precision of this model which apply to zone high-standard prime farmland.关键词
最小费用距离模型/高标准基本农田建设区/划定/关中地区Key words
least-cost distance model/construction areas of high standard primary farmland/zoning/Guanzhong region引用本文复制引用
杨绪红,金晓斌,郭贝贝,周寅康..基于最小费用距离模型的高标准基本农田建设区划定方法[J].南京大学学报（自然科学版）,2014,(2):202-210,9.基金项目
国土资源部公益性行业科研专项(201011016),国家自然科学基金(41201386),教育部博士点基金(20120091110014) （201011016）
