基于实测水文数据的不规则河道水面模拟方法

A simulation method for irregular river water surface based on measured hydrological data

目前水体模拟的研究大部分是针对海面或湖面,而河流由于形状不规则、流经范围广、高程变化大等原因,模拟研究较为困难。从真实的地理环境出发,以DEM数据和水文数据为基础,通过逼近水位高程的方法搜索出河流边界点,提取出了不规则的河岸线,并进一步通过不规则三角网划分,得到了河道水面模型。以金沙江溪洛渡库区为实验区域,采用不规则河流边界提取算法,建立了不规则河道水面模型,通过加入水面波浪、反射、高光等自然现象,渲染出了较为真实的河流,验证了该方法的可行性。

The current research on water surface simulation, basically limited to sea surface or lake water surface, is less ap plied into river water surface due to its irregular shape, wide range and complex variation of water elevation. Based on realistic geographical circumstance and the hydrological and DEM data, the irregular riverside line is extracted according to river boundary points that are searched by approaching the water level elevation. The river water surface model is established by triangulation mesh. The presented model is applied into Xiluodu Reservoir area successfully render more real fiver surface by considering water wave, water reflection and highlight effects.