CONTRIBUTION TO THE POSSIBILITY OF IDENTIFYING THE FLOODPLAIN FOREST IMPACT TO THE FLOOD WAVES MITIGATION USING 1D AND 2D HYDRAULIC MODELS AND GIS

In the scientific literature, the influence of floodplain forest and riparian areas on the impairment of peak flow and volume of flood waves is often discussed both in technical and natural sciences. A common deficiency, which is advertised by the authors, is the inability to quantify such an effect, which arises from the difficulty in measuring the hydrological elements in the channels and inundation during extreme phases of runoff, where it undoubtedly belongs floods, and when the influence of floodplain forest, as all assumptions, is increasing. This case study focuses on the possibility of analysis of the impact of riparian forests with the support of different GIS tools and simulations in 1D and 2D hydraulic models. The aim was to highlight the possibility to quantify the impact of forest on the local and general characteristics of the flood wave and verifying the viability of infrastructure GIS and hydraulic models like-minded analysis. The selected hydraulic models were the most widely used tools and industrial standards HEC-RAS, MIKE 11 and MIKE 21c. Pilot area was inundation area in the Upper Morava Litovelske Pomoravi Nature Reserve.