نتایج جستجو برای: flood point

تعداد نتایج: 546883  

Journal: :مدیریت آب و آبیاری 0
نسترن چیت ساز کارشناس ارشد گروه مهندسی آبیاری و زهکشی، پردیس ابوریحان، دانشگاه تهران، پاکدشت - ایران محمد ابراهیم بنی حبیب دانشیار گروه مهندسی آبیاری و زهکشی، پردیس ابوریحان، دانشگاه تهران، پاکدشت – ایران

the multi-criteria decision making model is an important tool for decision making in water resource management. in this paper, the topsis model was used to rank seven flood management options in the gorganrood river flood management project, including conservation of natural condition, golestan reservoir management, levee construction, diversions-channel construction, flood forecasting and warn...

Journal: :Remote Sensing 2013
Sandro Martinis André Twele Christian Strobl Jens Kersten Enrico Stein

A two-component fully automated flood monitoring system is described and evaluated. This is a result of combining two individual flood services that are currently under development at DLR’s (German Aerospace Center) Center for Satellite based Crisis Information (ZKI) to rapidly support disaster management activities. A first-phase monitoring component of the system systematically detects potent...

2010
L. T. K. Ho M. Umitsu Y. Yamaguchi

The objective of this study is to generate a flood hazard map based on geomorphologic approach employing Shuttle Radar Topographic Mission (SRTM) DEM and satellite image data (ASTER and LANDSAT). Supervised classification of satellite images is implemented to characterize land cover types. Moreover, the Modified Normalized Difference Water Index (MNDWI) is undertaken to identify moist surface o...

2015
Shi-Wei Lo Jyh-Horng Wu Fang-Pang Lin Ching-Han Hsu

With the increasing climatic extremes, the frequency and severity of urban flood events have intensified worldwide. In this study, image-based automated monitoring of flood formation and analyses of water level fluctuation were proposed as value-added intelligent sensing applications to turn a passive monitoring camera into a visual sensor. Combined with the proposed visual sensing method, trad...

2008
Hyun-Han Kwon Casey Brown Upmanu Lall

[1] It is widely acknowledged that climate variability modifies the frequency spectrum of extreme hydrologic events. Traditional hydrological frequency analysis methods do not account for year to year shifts in flood risk distributions that arise due to changes in exogenous factors that affect the causal structure of flood risk. We use Hierarchical Bayesian Analysis to evaluate several factors ...

2013
Cheng Gao Jun Liu Zhuowen Wang

Traditional flood control systems always have a conflict with natural ones, i.e., rivers in cities are usually straight and smooth, whereas natural ones are according to ecological mechanisms. Social and economic developments in the modern world require a new system combining ecological needs and traditional flood control system. Ecological flood control systems were put forward and defined as ...

2014
Emily Schnebele Guido Cervone Shamanth Kumar

Every year, flood disasters are responsible for widespread destruction and loss of human life. Remote sensing data are capable of providing valuable, synoptic coverage of flood events but are not always available because of satellite revisit limitations, obstructions from cloud cover or vegetation canopy, or expense. In addition, knowledge of road accessibility is imperative during all phases o...

Journal: :Risk analysis : an official publication of the Society for Risk Analysis 2012
Erwann Michel-Kerjan Sabine Lemoyne de Forges Howard Kunreuther

In the United States, insurance against flood hazard (inland flooding or storm surge from hurricanes) has been provided mainly through the National Flood Insurance Program (NFIP) since 1968. The NFIP covers $1.23 trillion of assets today. This article provides the first analysis of flood insurance tenure ever undertaken: that is, the number of years that people keep their flood insurance policy...

2007
ANDREOLI Rémi

Semi-automatic flood extraction procedures based on change detection techniques appear particularly adapted to plain flood monitoring and mapping. The change detector was specifically elaborated to analyse ENVISAT ASAR Wide Swath Mode data pairs, which appear very well adapted to flood monitoring over wide areas. The algorithm is based on two analysis levels: an enhanced ratio for strong change...

2016
Jiayi Huang

Facing rising sea levels, increasing peak discharges of the rivers and intensification of rainstorms due to climate change; the subsidence of land; development of urbanization; and the growth of population, flood risks continue to be the prime issue to the Netherlands. As the frequency and severity of floods increase, the reconsideration of current flood defense strategies is imperative. This p...

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