论文部分内容阅读
为了以小流域为基础建立大流域分布式数字水文模型,建立了一个大流域数字高程模型数据的获得及存取管理系统。该系统把数据的处理水平从单块扩展到多块。以地形源数据的来源及预处理、分块数据文件的存储结构、地形数据的跨块读取3个基本问题为基础,该系统成功地用于管理黄河流域花园口以上70多万km2的地形数据,完成了从地形源数据获得、预处理到存储、读取这一系列过程。利用这个系统,可以快速正确地获取黄河流域内的任何一个子流域的地形数据。这些工作为建立黄河全流域的分布式水文模型打下了基础。
In order to establish a distributed digital hydrological model for large basins on the basis of small watershed, a system for obtaining and accessing digital elevation model data in large watershed was established. The system extends the level of data processing from chunks to chunks. Based on the three basic problems of source and pretreatment of terrain source data, storage structure of block data files and cross-block reading of terrain data, the system is successfully used to manage the topography of more than 700,000 km2 at Huayuankou in the Yellow River Basin Data, completed from terrain source data acquisition, pretreatment to storage, read this series of processes. Using this system, the terrain data of any sub-catchment in the Yellow River Basin can be quickly and correctly obtained. These work laid the foundation for the establishment of a distributed hydrological model for the Yellow River basin.