Based on digital elevation model(DEM) and mathematical programming, the optimal design of farmland division, earthwork calculation and transportation in land leveling project was studied. Taking Hushu land consolidation project of Jiangning county in Nanjing city as a case, a large-scale DEM was generated from digital topographic datasets and farmland was divided into land leveling regions and units, and then the land leveling units elevation、 earthwork volume and the barycenter were calculated with DEM in ArcGIS9.3. Finally mathematical programming was applied for solving optimal design of elevation and earthwork transportation. Results showed that the model could reasonably calculate farmland scale, the design elevation of land leveling units and obtained the optimal earthwork transportation thematic map. The new design by the model reduced 9.37% earthwork than the original one. Results indicate that the combination methods of DEM and mathematical programming can improve calculation efficiency and precision of land leveling project, and reduce the project investment.%应用数字高程模型(DEM)与数学规划(MP)方法,研究土地平整工程设计中田块的划分、土方量计算和土方量调配的优化方法,为土地平整工程设计提供综合、系统和精确的方法,节约投资费用.该文以南京市江宁区湖熟镇土地平整项目工程为例,采用ArcGIS9.3软件建立大比例尺DEM,划分了土地平整区域和耕作田块,基于DEM计算了现状高程、土方量、土方运输重心,采用数学规划求解了设计高程和土方调配的最优方案.研究表明:该方法合理确定了田块的规模、定量计算了优化设计高程、总土方量比原设计方案减少了9.37％,且制作了最优土方调配路径图.
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