基于GIS的赣抚平原灌区数据库构建和空间分析

为实现灌区信息的统一化管理和空间分析,提高灌区管理工作的效率和水平,构建了一个基于ArcGIS的灌区信息管理系统.以数据库为手段,通过数据收集、组织、编辑、转换实现对灌区多源空间数据和属性数据的融合分析,可实现数据的维护、可视化管理和统计分析,特别是基于ArcGIS的统计分析功能,实现灌区土地利用类型、高程和坡度的分布规律及其相互关系的统计分析.以江西省赣抚平原灌区为例,在多源空间数据和属性数据的基础上,构建了灌区基础地理信息数据库,实现了灌区信息的集中管理、查询、统计和维护更新.基于统计分析得到了灌区高程、坡度和土地利用类型的空间分析规律.结果表明:灌区大部分地势平坦,主要以农业用地为主.高程较低地势起伏较小时,主要的土地利用类型是水稻,随地势增高和坡度变陡,林地所占的比重逐渐增大,成为主要的土地利用类型.

GIS-based database construction and spatial analysis of Ganfu Plain Irrigated District

In order to achieve unified management and spatial analysis of irrigation district information, and thus improve the efficiency and level of irrigation district management, an irrigation district information management system was developed based on ArcGIS. The system utilizes the database as a means to realize the fusion analysis on multi-source spatial and attribute data of an irrigation district through data collection, organization, editing and conversion. As a result, data maintenance, visualization management and statistical analysis can be achievable. Specially, based on the statistical analysis function of ArcGIS, the land use types, elevation and slope distribution rules and their correlations of each other can be analyzed. Taking the Ganfu Plain Irrigation District in Jiangxi Province as an example, based on the multi-source spatial and attribute data, a geographic basic information database of the district was constructed, and centralized management, inquiry, statistics, maintenance and update of information were realized. Through a statistical analysis, the spatial distribution characteristics of land use types, elevation and slope in the district were obtained. The results show that most of the irrigation district is flat and mainly used as agricultural land. When the elevation is low and the terrain is less undulate, the main land use type is paddy. As the terrain increases, and the slope gets big, the proportion of woodland rises gradually, and eventually woodland is the main land use type.