نتایج جستجو برای: flood forecasting and warning system
تعداد نتایج: 17138290 فیلتر نتایج به سال:
Accurate and timely weather forecasting is a major challenge for the scientific community in hydrological research such as river training works and design of flood warning systems. Neural Network (NN) is a popular regression method in rainfall predictive modeling. This paper investigates the effectiveness of the hybrid Particle Swarm Optimization (PSO) and Genetic Algorithm (GA) evolved neural ...
over the past decades a number of approaches have been applied for forecasting mortality. in 1992, a new method for long-run forecast of the level and age pattern of mortality was published by lee and carter. this method was welcomed by many authors so it was extended through a wider class of generalized, parametric and nonlinear model. this model represents one of the most influential recent d...
The quality control, validation and verification of the European Flood Alert System (EFAS) is described. EFAS is designed as a flood early warning system at pan-European scale, to complement national systems and provide flood warnings more than 2 days before a flood. On average 20-30 alerts per year are sent out to the EFAS partner network which consists of 24 National hydrological authorities ...
Sensitivity analysis is a fundamental approach to identify the most significant and sensitive parameters, helping us to understand complex hydrological models, particularly for time-consuming distributed flood forecasting models based on complicated theory with numerous parameters. Based on Sobol’ method, this study compared the sensitivity and interactions of distributed flood forecasting mode...
nowadays in trade and economic issues, prediction is proposed as the most important branch of science. existence of effective variables, caused various sectors of the economic and business executives to prefer having mechanisms which can be used in their decisions. in recent years, several advances have led to various challenges in the science of forecasting. economical managers in various fi...
introduction the floods particularly in arid regions of iran damage railroads each year. most of the damages are in the rail bridges on stream channels because of the channel bed replacements, sudden rainfalls and disjointed bed materials. dry channels of the streams, the flat surface of the ground, and lack of vegetation cover result in seasonal and annual channel bed replacements. these chann...
Flood is one of the most important natural disasters affect China greatly, especially for southeast cities. To help mitigate the loss brought by it, technologies such as simulation, visualization, decision support system, etc. could be utilized in the process of emergency management for city flood. Thus the Flood Simulation and Decision Support System (FSDSS) comes into being. It is an integrat...
A Flood Monitoring and Warning System (FMWS) operating in real time is the main non-structural measure for reducing risk in flood-prone areas. During the last years significant efforts were addressed to improve the reliability of the forecast quantities mainly by assessing the forecast uncertainty in order to avoid the “illusion of certainty” for decision-makers. In this context, the purpose of...
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