GIS-based database construction and spatial analysis of Ganfu Plain Irrigated District
MA Linhua1, SHI Yuanzhi2, CAI Shuo3, CUI Yuanlai1*
1.School of Water Resources and Hydropower Engineering, Wuhan University, Wuhan, Hubei 430072, China;2. Nanjing Hydraulic Research Institute, Nanjing, Jiangsu 210009, China; 3. Jiangxi Central Irrigation Experiment Station, Nanchang, Jiangxi 330201, China
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.
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