ASSESSING CHANGES IN MAXIMUM PLUVIAL DISCHARGEVALUES IN A DEVELOPING URBAN AREA (CASE STUDY SATU MARE)


Csaba Horvath1, Cornel Ovidiu Mates1, Victor Sorocovschi1 Gheorghe Roșian2, Rozalia Benedek3


1 Babeş-Bolyai University, Faculty of Geography, 400006, Clinicilor Street, No. 5-7, Cluj-Napoca, Romania; e-mail:hcsaba@gmail.com, cornelov@yahoo.com, sorocovschi@yahoo.com
2 Babeș–Bolyai University, Faculty of Environmental Science and Engineering, 400294, Fântânele Street, No. 30, Cluj–Napoca, Romania; e-mail: georgerosian@yahoo.com
3 Babeş-Bolyai University, Faculty of Geography, Zalau Branch, Romania; e-mail: rozaliabenedek@yahoo.com


Abstract: - Assessing Change in Maximum Pluvial Discharge Values in an Urban Area (Case Study Satu Mare). In small catchments it is not always possible to assess the entire volume and characteristics of the flood hydrograph, so in practice the most important component became the maximum discharge. This is also true regarding the small urban catchments where generally one doesn’t have continuous hydrometrical measurements and has to assess the possible maximum discharge values through indirect formulae. For the present analysis, the case study was chosen in Satu Mare, a low plain city in the northern part of Romania, a city where the main differences regarding the urban floods are due to the impervious characteristics of the area and only in small part the catchment morphologic characteristics. From the multitude of formulas and methods we choose the SCS-Curve Number method which is based mainly on the areas land use and imperviousness characteristics, so one can assess the changes in the runoff due to changes in these factors. GIS analysis and remote sensing data was used to assess the urban area’s hydrological characteristics and the maximum pluvial flood values. To further assess the cities sustainable evolution and development it is necessary to know the areas susceptibility to various natural risks and the hydrological risks represent one of them. Because in many cases the urban areas don’t benefit of hydrometrical control it is necessary to have quick and reliable methods to assess with acceptable accuracy the maximal pluvial flood values, using modern techniques.


Keywords: urban pluvial flood discharge, SCS-Curve Number, GIS, Satu-Mare

FULL TEXT

© Academia Romana - Filiala Cluj Colectivul de Geografie

Design by Bilasco Stefan