基于ArcGIS的耕地整治潜力测算与分级研究——以湖北省房县为例

Study on the Potential Calculation and Classification of Farmland Remediation Based on ArcGIS——A Case Study on Fang Xian County

土地整治工作是一项综合性的系统工程,潜力测算与分级是土地整治工作的前提和基础。以ArcGIS软件为平台,采用基于新增耕地系数的数量潜力测算方法,通过调查待整治耕地面积,确定新增耕地系数,测算出房县的耕地整治数量潜力为1 210.18hm2;质量潜力测算采用基于农用地分等定级成果和产能核算理论的方法,通过计算耕地现实单产和最高单产,分别计算出待整治耕地提升产能和新增耕地产能,得出房县耕地整治的质量潜力为9 485.38万kg;最后以质量潜力测算后的耕地总产能作为潜力分级标准,将整治潜力划分为三个级别,并绘制了以乡(镇)为单元的潜力分级图。根据潜力级别划分结果,结合各乡镇的地形地貌、经济发展水平、农民整治意愿等条件,将一级潜力区、二级潜力区和三级潜力区按照整治时序分别确定为房县耕地近期重点整治区、中期适宜整治区、远期一般整治区。

The work of land remediation is a comprehensive system.Potential calculation and classification are the premise and basis of land remediation work.This paper works on ArcGIS software platform.The farm land quantity potential of Fangxian County is 1 210.18 hectares by investigating the area of farmland and determining the new farmland coefficient.Farmland quality potential is 94 853 800 kg measured on the base of agricultural land classification and productivity accounting theory.Through calculating the real yields of arable land and the highest yields,production capacity of arable farmland to be remediation and new added farm land increased.With a total capacity of arable land as the potential grading standards,the farmland potential remediation can be divided into three levels and potential classification map can be drawn.According to the potential level of division results,the level of economic development and farmer willingness,the first level potential area is identified as the recent major remediation area by combining with the topography of the township.The second level potential area is identified as the medium appropriate remediation area and the third level potential area is identified as the forward general improvement district.