نتایج جستجو برای: flood water
تعداد نتایج: 568737 فیلتر نتایج به سال:
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...
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...
Flood forecasting is particularly difficult and uncertain for small drainage basins. One reason for that is the absence of adequate temporal and spatial hydrological input variables for model-based flood predictions. Incorporating additional information collected by volunteers with the help of their smartphones can improve flood forecasting systems. Data collected in this way is often referred ...
Two-third of the area of the Netherlands is flood prone. Storm surges at the North Sea, floods in the rivers, failure of secondary dikes, as well as heavy rainfall may cause flooding. Most of the flood prone areas rely for their existence on drainage by pumping, because their surface level may be permanently or during floods up to several metres below the surrounding water levels. During the pa...
Almost two centuries of human interventions at the Upper Rhine to adapt the river systems to led to a serious increase of the flood risk and potential damage downstream. In 1982, the two riparian countries, Germany and France, agreed to re-establish the former protection level against a once-in-200-years flood, with Germany taking most of the workload. This can be considered as the starting poi...
The current policy-making on EU level in the field of water resource conservation and flood risk management displays tendency in applying sustainability approach for water status improvement, water scarcity and droughts, as well as reduction of disasters. The appearance of floods as natural disasters is associated mainly with community vulnerability to adverse effects of a natural hazard. There...
The exceptional flood of the river Odra in July/August 1997 caused severe damage, especially on the Polish side of the Odra valley. An additional 5 km3 of water were discharged during the flood. This represents about a third of the normal annual Odra discharge of 17 km3. Large agricultural and industrial areas were submerged, as well as towns and villages. However, as regards the Odra lagoon an...
Flood flows in inundated urban environment constitute a natural hazard. During the 1213 January 2011 flood of the Brisbane River, detailed water elevation, velocity and suspended sediment data were recorded in an inundated street at the peak of the flood. The field observations highlighted a number of unusual flow interactions with the urban surroundings. These included some slow fluctuations i...
agreed to take an initiative on flood prediction, prevention and mitigation. A core group led by the Netherlands and France has prepared a "best practice document" on flood prevention, protection and mitigation to be presented to the Water Directors meeting in Athens in June 2003. The document at hand concerns the " best practice document " , which is an update of the United Nations and Economi...
Climate change may well lead to an increased risk of river floods in the Netherlands. However, the impacts of changes in water management on river floods are larger, either enhancing or reducing flood risks. Therefore, the abilities of water-management authorities to learn that climate and river flows are changing, and to recognize and act upon the implications, are of crucial importance. At th...
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