DBPapers
DOI: 10.5593/SGEM2014/B31/S12.080

SIMULATION OF FLOOD DISCHARGES FOR PURPOSES OF THE ASSESSMENT OF EXTINCT POND AREA TRANSFORMATION POTENTIAL

V. David, L. Strouhal, T. Davidova
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-13-1 / ISSN 1314-2704, June 19-25, 2014, Book 3, Vol. 1, 617-624 pp

ABSTRACT
The possible impacts of climate change have become very often discussed topic among both the scientific and public community. There is strong emphasis put on the mitigation of these impacts which are considered very different involving more frequent floods with higher magnitudes as well as more frequent and longer periods of droughts. The building of new reservoirs could be one of possible ways to deal with this challenge. The landscape in the Czech Republic is facing many pressures caused most of all by urbanization which results in the lack of space for building water reservoirs. The restoration of extinct ponds is considered as a good way to increase the percentage of water bodies in the Czech Republic and therefore it is one of main tasks of the research activities carried out within the project NAZV KUS QJ1220233 “Assessment of former pond systems with aim to achieve sustainable management of water and soil resources in the Czech Republic”. To assess the possible effect of the restoration, it is necessary to make an analysis on the methodology for testing. In this paper, the hydrologic modelling approach is applied for purposes of the assessment of one extinct pond. The model applied for given purpose is Gridded Surface Subsurface Hydrologic Analysis (GSSHA). The calibration of the model was carried out using the data measured upstream from the study location of former pond at the experimental site of the Department of Irrigation, Drainage and Landscape Engineering. This paper focuses on the assessment of the pond restoration on flood discharges while its effect for drought mitigation is not involved as it needs completely different approach, data and tools. The results of presented analysis show, that the restoration of extinct pond can affect flood discharges significantly. The influence on flood wave is different for the restoration of pond and maintaining it as water body and for the transformation into the polder. The transformation effect varies with the return period, i.e. with the magnitude and volume of transformed flood wave. Presented results reflect only one case of the outlet object.

Keywords: extinct pond, pond restoration, flood protection, distributed hydrologic modelling. 617