Naslov
Problems in Calculation of Precipitation Water Drainage in Urban Areas
(Problems in Calculation of Precipitation Water Drainage in Urban Area)

Autori
Ožanić, Nevenka ; Rubinić, Josip

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
International Workshop on Non-Structural Flood Control in Urban Areas / B. Braga - São Paulo : Regional Center for Tropical Climates, 1997, 31-32

Skup
International Workshop on Non-Structural Flood Control in Urban Areas

Mjesto i datum
São Paulo, Brazil, 20.04.1998. - 22.04.1998

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Urban drainage (runoff) system; hydrological calculations; calculation mistakes; intensity of precipitation

Sažetak
Flood appearance in urban areas is commonly caused by the urban areas precipitation’s themselves. The reason for their appearance are often inevitable e.g. extreme rainfalls, hydrological runoff conditions or the degree of drainage systems development, but sometimes the damages caused by flood appearance are the result of methodological mistakes in hydrological calculations. Such mistakes in hydrological calculations are sometimes so expressed that whole constructions for precipitation water draeinage system in urban areas became questionable and the main reason for these mistakes is that basic hydrological principals are ignored. Therefore, present paper analyzes the possibilities for minimalization of these mistakes in hydrological calculations of precipitation water drainage as one of possible ways for non-structural flood protection in urban areas. Because most of the methods for hydrological calculations of high waters in urban areas are almost universal, the mistakes are certainly widespread in distribution also. The incorrect methodological application of hydrological calculations, although without good reason, is very rarely the subject of professional papers. Therefore this work emphasizes the most frequent mistakes in calculations of maximal runoff values. First of all the real characteristics of short-termed intensive precipitation regime are often ignored as well as the time of concentration and the runoff pattern in canal network. Besides that the mode of evacuation of longer returning period precipitation, than the one that was used for the dimensioning of drainage system, are often not considered as well.

Izvorni jezik
Engleski

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