نتایج جستجو برای: flood discharge

تعداد نتایج: 123276  

Floods are among the natural disasters that cause human hardship and economic loss. Establishing a viable flood forecasting and warning system for communities at risk can mitigate these adverse effects. However, establishing an accurate flood forecasting system is still challenging due to the lack of knowledge about the effective variables in forecasting. The present study has indicated that th...

2016
Jun Wang Zhongmin Liang Xiaolei Jiang Binquan Li Li Chen Ataur Rahman

Real-time correction models provide the possibility to reduce uncertainties in flood prediction. However, most traditional techniques cannot accurately capture many sources of uncertainty and provide a quantitative evaluation. To account for a wide variety of uncertainties in flood forecasts and overcome the limitations of stationary samples in a changing climate, a Bayesian theory based Self-a...

2004
Michael Manga

[1] Young flood channels emanate from Cerberus Fossae, Mars. In order to determine whether subsurface aquifers can discharge water sufficiently fast to explain these flood features, I develop a model that couples groundwater flow in a sub-cryosphere aquifer with flow through a fissure that penetrates from the surface to the aquifer. The model is constrained by estimates of peak discharge, and t...

2016
Hongyan Li Shanshan Bao Xiaojun Wang Hang Lv

Rainstorm weather systems and storm flood characteristics were studied to explore the relationship between the rainstorm weather system, the type of rainstorm, the cause of the flood and the time of occurrence, and some basic characteristics law of storm floods are summarized in the Second Songhua River Basin (Northeastern China). Then, the periodicity of catastrophic years was identified using...

The disparate spatial and temporal distribution of rainfall in the country and climate variation sometimes leads to rivers flooding and large flood events, which are remarkable for life and financial losses. Flood control design requires accurate knowledge of the flood generator basin, especially smaller ones, in large basins. Determining the potential of flood generation to specify the...

2010
Marco Pellegrini Francesca Sini Angela Celeste Taramasso

This paper combines discrete wavelet transform (DWT) with an artificial intelligence algorithm in order to develop a new unsupervised method for fast detecting, localizing and classifying flood events in real stage-discharge time series. The proposed method does not require any a priori information such as catchment characteristics or alert flood thresholds; moreover, the simplicity of the meth...

2003
Jennifer M. Jacobs Min-Hui Wang

A numerical model is developed to determine the flow depth and discharge relationship for turbulent flows over vegetated flood plains. The model is based on the turbulent boundary layer similarity concepts developed for atmospheric and pipe flow hydraulics. Here, the Darcy–Weisbach formula is modified to account for vegetative resistance by application of surface roughness lengths developed fro...

2009
M. Sànchez-Marrè J. Béjar J. L. de Kok A. Y. Hoekstra

Although river dikes still play a key role for flood protection in the Netherlands there is a growing interest for other measures to deal with larger peak discharges, such as lowering or widening the floodplains. Regardless of the strategy chosen the assessment of its effect on the flood risk depends on the peak discharge statistics. A problem here is that the statistical analysis of peak disch...

حجه فروش نیا, شیلا, صفاری, امیر, کرم, امیر,

With the development of economy and social services, increased need to reduce risks, control risks and other important measures in order to provide program management and follow-up plans vulnerability, Having the right information and understanding the current situation in the field is essential for  prevention and planning measures, Therefore, research on risk reduction and knowledge of t...

تاجداری, خسرو, رضائی, پرویز, میرقاسمی, سید اسماعیل,

Flood pron areas of rivers are generally hazardous. Regionalizing these hazardous areas in terms of the degree of hazard they produce is very important for regional flood management, insurance companies and land users. Therefore, this research has tried to regionalize the potential hazard of the flood prone areas of the Morghak River using HEC-GeoRAS model as an example for all flood plains...

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