Primary Farmland Zoning Based on Land Evaluation and Spatial Clustering：A Case of Hefeng County
Author(s): NIE Yan, WU Xi-zi, YU Jing, FENG Sha, ZHOU Yong
Pages: 39-45
Year: 2013 Issue: 12
Journal: China Land Science
Keyword: land planning; basic farmland; land e valuation; spatial clustering; landscape fragmentation;
Abstract: The purpose of the paper is to explore the demarcating method of basic farmland based on land evaluation, landscape ecology and spatial clustering, which can be the references to the protection of basic farmland pla nning. The research methods are land evaluation, landscape fragmentation index and spatial clustering. The results indicate that: 1) the spatial difference of farmland quality in Hefeng County was described by evaluation indexes of four elements, eleven factors and data standardization of numerical type, linguistic type, spatial diffusion type according to factors attributes. 2) the two parameters of spatial distance and number of categories for K mean spatial clustering were improved by means of spatial distance proxim ity combining coordinate and attribute and landscape fragmentation index; then analyzing and exploring the change trend and relationship for number of category and fragmentation index of farmland, rate of change about fragmentation index and minimum polygon area, the optimal number of category and minimum eliminating polygon area were determined; 3) the quantitative structure and spatial distribution of prime farmland in Hefeng County which areas are 16162.01 hm2 and quality comprehensive indexes exceed 73 were obtained based on the results of spatial clustering and the plant target for prime farmland assigned from superior departments. It is concluded that this study can provide reference for the further improvement of the theoretical planning system of basic farmland and the deep implementation of practical projects.
Pages: 39-45
Year: 2013 Issue: 12
Journal: China Land Science
Keyword: land planning; basic farmland; land e valuation; spatial clustering; landscape fragmentation;
Abstract: The purpose of the paper is to explore the demarcating method of basic farmland based on land evaluation, landscape ecology and spatial clustering, which can be the references to the protection of basic farmland pla nning. The research methods are land evaluation, landscape fragmentation index and spatial clustering. The results indicate that: 1) the spatial difference of farmland quality in Hefeng County was described by evaluation indexes of four elements, eleven factors and data standardization of numerical type, linguistic type, spatial diffusion type according to factors attributes. 2) the two parameters of spatial distance and number of categories for K mean spatial clustering were improved by means of spatial distance proxim ity combining coordinate and attribute and landscape fragmentation index; then analyzing and exploring the change trend and relationship for number of category and fragmentation index of farmland, rate of change about fragmentation index and minimum polygon area, the optimal number of category and minimum eliminating polygon area were determined; 3) the quantitative structure and spatial distribution of prime farmland in Hefeng County which areas are 16162.01 hm2 and quality comprehensive indexes exceed 73 were obtained based on the results of spatial clustering and the plant target for prime farmland assigned from superior departments. It is concluded that this study can provide reference for the further improvement of the theoretical planning system of basic farmland and the deep implementation of practical projects.
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