introduction flood is an inevitable natural phenomenon occurring from time to time in all rivers and natural drainage systems, which not only damages the lives, natural resources and environment, but also causes the loss of economy and health. so estimation and prediction flood hazard is very important spatially in the watersheds without measurement station. there are many models in the water a...

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...

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, ...

Considering characteristics of high river density, special underlying surface in plain river network region, and municipal drainage system function, river network drainage unit model is proposed, which is defined as a region surrounded by main river or embankment. Flood storage variety and control projects regulation of small rivers in each unit is simulated. With drainage catchment as an objec...

Flood events have become intense and more frequent due to heavy rainfall hurricanes caused by global warming. Accurate floodwater extent maps are essential information sources for emergency management agencies flood relief programs direct their resources the most affected areas. Synthetic Aperture Radar (SAR) data superior optical mapping, especially in vegetated areas forests that adjacent urb...

The Maritime province of Nova Scotia has seen coastal flooding become a more frequent phenomenon during the past decades due to changing climate regime. This influenced interest provincial and federal governments have in flood risk modelling, who often incorporate Geographic Information Systems (GIS) as useful tools their analysis. Incorporating LiDAR-derived digital elevation models (DEMs) wor...

Flood risk analysis is more complex in urban areas than that in rural areas because of their closely packed buildings, different kinds of land uses, and large number of flood control works and drainage systems. The purpose of this paper is to propose a practical framework for flood risk analysis and benefit assessment of flood control measures in urban areas. Based on the concept of disaster ri...

The operation of flood retarding areas does not attract much attention, although they are important components of flood control systems. Poor operation of such areas restricts not only the socio-economic development of the flood retarding area, but also limits scientific flood control options. As the second-largest flood retarding area in China, with more than 2000 km2 and 300 polders, the Hong...

Delta channel networks (DCNs) are highly complex and dynamic systems that governed by natural anthropogenic perturbations. Challenges remain in quickly quantifying the length, width, migration, pattern changes of deltaic channels accurately with a high frequency. Here, we develop quantitative framework, which introduces water occurrence algorithm based on Landsat time-series data spatial morpho...