胖头泡蓄滞洪区水文地貌关系正确的DEM建立

DEM establishment with correct hydrogeomorphic relations for Pangtoupao flood storage and detention area

开展胖头泡蓄滞洪区空间地形数据采集,形成一套完整、准确的蓄滞洪区数字高程模型(DEM),将为蓄滞洪区建设、管理和调度决策提供可靠的信息依据与技术支撑。文中利用1:5万数字地形图,进行地形数据采集与编辑检查,建立了水文地貌关系正确的DEM,并对其质量进行了评价。研究结果表明,基于水文地貌关系正确建立的DEM质量较高,能更加准确、真实地反映地形形态和地貌与水文关系,精度满足标准规范的要求。

Through the spatial terrain data acquisition of Pangtoupao flood storage and detention area, the complete and accurate digital elevation model(DEM) of storage and detention area is developed, which could provide the reliable information basis and technical support for the building, management and scheduling decision of the flood storage and detention area. The digital topographic map with the scale of 1:50000 is used for capturing the topographic data and editing and checking the data, then the DEM with correct hydrogeomorphic relations is established, and its quality is evaluated. The study results show, the DEM with correct hydrogeomorphic relations has the higher quality, which could reflect accurately and veritably the relation between the landform and geomorphology and the hydrology and meet the precision requirements of standard specification.