中小尺度流域水文模拟中水文网络模型的应用研究

Study on Application of Hydrological Net Model in Small and Medium Scale River Basins

对流域水流的空间分散与聚合状况水文网络模型可利用拓扑关系来确定,它是规范化描述流域实际河网水系的一种基于地理信息系统的科学方法。水文网络的准确描述是影响流域水流空间分布模拟的关键因素,其网络构成要素及拓扑关系的形成是构建数据模型的关键。文章以辽河流域辽宁段为例,利用水文网络模型模拟分析了其河网水系分布。实例表明:对流域河网水系结构利用水文网络模型分析,不仅能够更加准确、客观的反映在时间与空间上的流域分布状态,而且模拟结果能够系统的体现流域状况,在描述流域河网水系与径流分析方面具有呈现出良好的可行性与准确性。

Topological relation can be used to confirm the situation of spatial dispersion and aggregation of flow in the basin in hydrological net model,which is a kind of scientific method based on geological information system normalizing the description of actual river net water system of the basin. Correct description from the hydrological net is the key factor to simulate spatial distribution impacting the flow in the basin,and its net components and formation of topological relation is the key of constructing the data model. Taking the Liaoning section of Liao river basin as the example,its distribution of river net water system was simulated and analyzed with the hydrological net model. The case shows that: analysis on water system structure of river net in the basin by using the hydrological net model,can not only reflect more correctly and objectively the river basin distribution state in time and space,but also can simulate the watershed state embodied from the system,showing good feasibility and accuracy in describing the water system of river net and runoff analysis.