نتایج جستجو برای: flood index

تعداد نتایج: 418267  

2005
Jana Jurečková Hira L. Koul Jan Picek

We propose a class of nonparametric tests on the Pareto tail index of the innovation distribution in the linear autoregressive model. The simulation study illustrates a good performance of the tests. Such tests have various applications in a study of flood flows, rainflow data, behavior of solids, atmospheric ozone layer and reliability analysis, in communication engineering, in stock markets a...

Journal: :نشریه علمی - پژوهشی هیدرولوژی کاربردی 0
abolfazl mohammadi natural disaster management, sazehpardazi iran co abdollah pirnia natural resources faculty, sari agriculture sciences and natural resources university, mazandaran province, iran

flood is considered as a major threat among natural disasters in the world. this case becomes more important and has a higher risk in urban areas due to the existence of important uses. therefore, to reduce damages resulted from flood, this phenomenon must be managed and planned using structural and non-structural approaches. considering the development in iran has been carried out in high risk...

Journal: :Natural Hazards and Earth System Sciences 2014

2007
Lei Zhu

A new agricultural flood losses prediction method using digital elevation data combined with agricultural economic data is presented. The method is based on dynamically simulating the procedure of flood out. An example in Huangdunhu flood detention area, Jiangshu province of China has been given to describe how to use it to predict the incoming agricultural losses. Compared with prior methods, ...

2004
Chang Shu Donald H. Burn

[1] Recent theoretical and empirical studies show that the generalization ability of artificial neural networks can be improved by combining several artificial neural networks in redundant ensembles. In this paper, a review is given of popular ensemble methods. Six approaches for creating artificial neural network ensembles are applied in pooled flood frequency analysis for estimating the index...

Journal: :Int. J. Applied Earth Observation and Geoinformation 2012
Renaud Hostache Patrick Matgen Wolfgang Wagner

Synthetic Aperture Radar images are routinely used for delineating flooded areas. Processing algorithms are often based on change detection techniques that enable a comparison of backscattering signals between the flood image and a reference image. However, as of today, there is little guidance on how to rapidly and reliably extract the most adequate reference image from an online archive. Our ...

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