Sustainable groundwater production from karst aquifers is primarily dictated by its recharge rate. Therefore, it is essential to accurately quantify annual groundwater recharge in order to limit overexploitation and to evaluate artificial methods for groundwater enrichment. Infiltration during erratic flood events in karst basins may substantially contribute to aquifer recharge. However, the co...

Flood waves resulting from dam breaks and flash floods have been responsible for numerous losses. In the present study, sudden flood releases were investigated down a large stepped waterway initially dry. A new experimental technique was developed to obtain instantaneous void fractions, bubble count rates and velocities. Unsteady air-water flow properties were recorded with arrays of conductivi...

The use of engineering risk analysis and multi-objective decision-making under risk are considered as tools for floodplain management and extreme flood protection. Distinction is made between (a) the catchment or large scale planning and (b) the local or small-scale design of protection measures. After defining the risk of flooding at different scales and specifying the multiple criteria that m...

Flash floods occur periodically in Makkah city, Saudi Arabia, due to several factors including its rugged topography and geological structures. Hence, precise assessment of floods becomes a more vital demand in development planning. A GIS-based methodology has been developed for quantifying and spatially mapping the flood characteristics. The core of this new approach is integrating several top...

The area of the Dansuie River watershed located in the northern Taiwan is 2,726 km. The main stream runs 159km through the Taipei metropolitan areas as the political, economic, and cultural centers of Taiwan. Owing to short and steep runoff path-lines and non-uniform rainfall patterns, large floods arrive rapidly in the middle-to-downstream reaches of the watershed, causing serious damage. In o...

the main aim of the current paper is to discuss the important effective variables, particularly synoptic patterns, in creating flood in masoule basin using flood discharge data in komadoul station during 20 year period (1984-2003). to achieve the aim, daily average and instantaneous maximum of discharge in mentioned station were used. data accuracy was done using the data for chomesghal station...

The feasibility of flash flood forecasting without making use of rainfall predictions is investigated. After a presentation of the “cevenol flash floods“, which caused 1.2 billion Euros of economical damages and 22 fatalities in 2002, the difficulties incurred in the forecasting of such events are analyzed, with emphasis on the nature of the database and the origins of measurement noise. The hi...

In this study spatial analysis tools are presented which allow the simulation and prediction of flash floods in semiarid basins to be carried out. Different applications are analysed of the Shyska operational system in real basins, developed with functions embedded in a Geographical Information System (GIS), which combines information from latest generation data acquisition technologies in real...

Mapping flash flood susceptibility is effective for mitigating the negative impacts of floods. However, a variety conditioning factors have been used to generate maps in various studies. In this study, we proposed combining logistic regression (LR) and random forest (RF) models with embedded feature selection (EFS) filter specific sets two map mainstream basin Songhua River. According EFS resul...