By Eve Gruntfest, John Handmer
This quantity is the lawsuits of a NATO-sponsored complex examine Institute (ASI) entitled "Coping with Flash Floods" held in Ravello, Italy on 8-17 November 1999. Thirty-five members from 9 nations attended the ASI, representing either built (United States, England, Italy, and Mexico) and constructing (Poland, Uganda, Greece, Ukraine, and Slovenia) nations. individuals from numerous professions and disciplines have been concerned together with a hydraulics engineering professor from Slovenia, 4 participants from the Polish Institute of Meteorology and Water administration, and a U. S. Geological Survey learn hydrologist from Puerto Rico. even supposing the ASI used to be formally composed of teachers and scholars, those roles have been blurred as everybody shared details and concepts, and discovered from the opposite contributors through the 10 days. one of many highlights of the ASI was once the collaborative attempt of members from assorted nations and disciplines. It was once really remarkable that the 2 engineers from Greece made the main passionate pleas for long-term sustainable ideas to flash floods. another instance is that whereas there have been merely 3 individuals with social technology backgrounds, many of the ideas specialize in the coverage and societal priorities, greater than the engineering, hydrologic or meteorologic efforts.
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Additional info for Coping With Flash Floods
Coping with Flash Floods, 19-35. © 2001 Kluwer Academic Publishers. Printed in the Netherlands. 20 nowcasting environment. For regions that do not have ample coverage from weather radar, high-resolution rainfall diagnoses in the nowcasting environment rely on the coarser resolution data from rain gages and satellite. As the hydrology of the phenomena begins receiving more attention, advanced research for modeling the runoff processes is also taking place . Geomorphologic data with sufficient accuracy and spatial resolution is now available in most regions of the world, but applying it to hydrologic models of drainage basins is still problematic.
Common Features of Historic Events Characteristics of the precipitation events and the affected basins have been analyzed for flash flood events depicted on Figures 1 and 2. These are summarized in Table I. 1. RAINFALL INTENSITY Total precipitation accumulation for the events in Table I varied from < 50 mm to >400 mm showing the large variation of this parameter. Precipitation rate is a much more important parameter, but more difficult to measure. Hourly precipitation accumulations of greater than 50 mm/h were common, but the important bursts of precipitation often occur on time scales that are less than an hour.
Rain gage information will have limited value due to the lack of spatial and temporal resolution in the data. Remote sensing of the hydrologic 31 environment in terms of moisture content seems to have the potential to provide useful information for flash flood forecasting. 1. HYDROLOGIC MODELS Modeling hydrologic response of drainage basins to climatological input is very complex. The phenomena and processes involved may never be fully understood. However, in the absence of perfect knowledge, different system components are often introduced to characterize combined effects of the physical processes.