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首页> 外文会议>International Conference on Water and Environment(WE-2003); 20031215-18; Bhopal(IN) >Mathematical Modelling Of Rainfall-Runoff Process For A Himalayan Watershed
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Mathematical Modelling Of Rainfall-Runoff Process For A Himalayan Watershed

机译：喜马拉雅流域降雨-径流过程的数学建模

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摘要

The mountainous watershed of Ramganga reservoir has been suffering from an acute problem of runoff and soil erosion because of steep terrain, high rainfall intensity, poor vegetal cover, deforestation, over- grazing of pastures and mismanagement of soil and water resources. The Ramganga river and its tributaries carry a flow, laiden with heavy sediment which results in flooding of the plain and siltation of reservoirs. The quantitative and qualitative status of prevailing runoff rates is needed for planning and management of the water resources programmes which has been duly recognized. The conceptual modeling approach is an attempt to simulate the complex and interdependent hydrologic processes by means of some mathematical representation, thus providing techniques for prediction of future events. The concept of instantaneous unit hydrograph (IUH) is one of the most important tools in system investigation of rainfall-runoff process. Utilizing the concept of IUH mathematical modeling of rainfall and runoff process for a Himalayan watershed of Ranganga reservoir catchment has been developed in this study. In view of this utilizing the concept of IUH which is dependent on effective rainfall intensity, the investigation were carried out for a strom events of rainfall and runoff for Gagas watershed with an expanse of 506 Km located in Ramganga reservoir catchment considering the system as lumped linear and time invariant hydrologic system.
机译：由于地势陡峭，降雨强度高，植被覆盖差，森林砍伐，牧场过度放牧以及土壤和水资源管理不善，Ramganga水库的山区流域一直面临着径流和土壤侵蚀的严重问题。拉姆甘加河及其支流流淌着沉重的沉积物，导致平原泛滥和水库淤积。水资源计划的规划和管理需要现行径流率的数量和质量状况，这一点已得到充分认可。概念建模方法是尝试通过一些数学表示法来模拟复杂且相互依赖的水文过程，从而提供了预测未来事件的技术。瞬时单位水位图（IUH）的概念是降雨径流过程系统研究中最重要的工具之一。在这项研究中，利用IUH降雨和径流过程数学模型的概念，开发了Ranganga水库集水区的喜马拉雅流域。考虑到这种利用依赖于有效降雨强度的IUH的概念，对位于拉姆甘加水库集水区506 km的Gagas流域的降雨和径流的暴动事件进行了研究，并将该系统视为集总线性。和时不变水文系统。

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