基于DEM栅格的水文模型在沂河流域的应用

本文结合GIS技术和数字高程模型,运用基于DEM栅格流域信息提取技术,对传统的新安江模型及TOPMODEL进行改进,构建基于栅格的分布式新安江模型、基于栅格的TOPMODEL水文模型。并将模型应用于沂河临沂以上流域。通过流域信息提取、模型参数率定和流域典型洪水模拟,以探讨GIS技术与数字高程技术的应用和水文模型的适应性。应用结果表明,4个水文模型在该流域上的水文过程模拟效果良好,其中,基于栅格的新安江模型与基于栅格的TOPMODEL的模拟效果更好。

Application of Hydrological models based on DEM in the Yihe Basin

The GIS technology and DEM-based watered information extracting methods are used to improve the Xinanjiang model and TOPMODEL.The new Xinanjiang model based on DEM grid,named Grid-Xinanjiang model,and the new TOPMODEL based on DEM grid,named GTOPMODEL are established.The models are applied to simulate the process of hydrology in Yihe basin.By watered information extracting,calibrating parameters and simulating flood processes,the suitability of GIS and DEM technology and corresponding models are investigated.The result shows that all these four models can well simulate the process of hydrology in Yihe basin.Among them the Grid-Xinanjiang model and GTOPMODEL based on DEM grid is better.