Abstract

Examples are given for numerical modeling of rain-induced flash floods in mountain areas based on actual and forecast data on precipitation. The calculated hydrographs are compared with the data of hydrometeorological network and calculations of other authors. Two hydrological models were applied: STREAM 2D CUDA, based on numerical solution of the shallow water equations in a two-dimensional (horizontal) formulation using an original algorithm, and KW-GIUH―a Geomorphological Instantaneous Unit Hydrograph model, based on kinematic wave equation. The direct numerical simulation of level regimes at the passage of flood wave and the incorporation of the accumulation of a part of flood flow by reservoirs–traps in the dynamic regime are new scientific results in hydrology. It is concluded that both models can be effectively used to forecast rain floods, in case reliable data on precipitation are available.

中文翻译：

---

利用自动水文气象网数据模拟北高加索小河的山洪

摘要

给出了基于实际降水和预报数据的山区降雨诱发的山洪暴发的数值模型的示例。将计算出的水文图与水文气象网络数据和其他作者的计算结果进行比较。应用了两种水文模型：基于原始算法的二维（水平）公式中浅水方程数值解的STREAM 2D CUDA和基于运动波方程的地貌瞬时单位水文模型KW-GIUH 。洪水波通过时的水位状态的直接数值模拟，以及水库中的部分水流在动态状态中的蓄水，这是水文学的新科学成果。得出的结论是，两种模型都可以有效地用于预报雨洪，