نتایج جستجو برای: for simulation flood hydrograph

تعداد نتایج: 10497686  

2006
M. Helms

Integrated river-basin management for the Volga river requires understanding and modelling of the flow process in its macro-scale tributary catchments. At the example of the Kostroma catchment (16 000 km2), a method combining existing hydrologic simulation tools was developed that allows operational modelling even when data are scarce. Emphasis was placed on simulation of three processes: snow ...

2004
A. R. Ghumman U. Ghani M. A. Shamim

This paper deals with flood routing in rivers using neural networks. The unsteady river flow may be formulated in terms of two one-dimensional partial differential equations. These are the Saint Venant flow continuity and dynamic equations. Several methods of solution of these equations are known. These methods are based upon characteristics of equations, finite difference, finite element and f...

Aims & Background Assessing the vulnerability of urban areas to surface water in cities is of particular importance. Destruction of the watershed upstream of urban areas, including the destruction of vegetation and road construction, as well as the uncontrolled expansion of urban and industrial lands, reduces the infiltration and increases runoff and carries the risk of floods. This study aims ...

2006
J. Cullmann V. Mishra R. Peters

WaSiM-ETH (Gurtz et al., 2001), a widely used water balance simulation model, is tested for its suitability to serve for flow analysis in the context of rainfall runoff modelling and flood forecasting. In this paper, special focus is on the resolution of the process domain in space as well as in time. We try to couple model runs with different calculation time steps in order to reduce the effor...

2011
Guangwei Huang

Better understanding of suspended sediment transport processes allows for better management of both rivers and coasts. Based on field data and sediment transport energy theory, this study presents an analysis on the suspended sediment hysteresis in the Lower Tenryu River of Japan in connection to the channel carrying capacity of suspended sediment and morphological characteristics. The transpor...

2002
Hjalmar Laudon Harry F. Hemond Roy Krouse Kevin H. Bishop

[1] Isotopic hydrograph separation (IHS) to define sources of event and preevent water during hydrological episodes has greatly improved the understanding of water, solute, and contaminant transport to streams during recent decades. However, the large variation in snowmelt isotopic composition, caused by fractionation during melting, has impeded an accurate separation of streamflow during sprin...

Journal: :مرتع و آبخیزداری 0
بیتا شیروی دانشجوی کارشناسی ارشد آبخیزداری، دانشکدة منابع طبیعی و محیط زیست دانشگاه فردوسی مشهد علی گلکاریان استادیار دانشکدة منابع طبیعی و محیط زیست دانشگاه فردوسی مشهد علی ابوطالبی پیرنعیمی کارشناس ارشد زمین‏شناسی، دانشکدة منابع طبیعی و محیط زیست دانشگاه فردوسی مشهد

check dams, are small dams in the watershed. these dams are constructed in susceptible areas to erosion due to reduce of flow velocity and erosion, control of sediment and flood in upstream of reservoir dams. these structures are made using wood, stone and cement, and gabion. these structures change the hydrological response of the watershed by reducing flow velocity, the channel slope and stor...

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