Key Types of Anthropic Influence on Surface Waters, Components of Spatial Decision Support System for Prevention and Management of Floods (Firiza Basin)

Abstract

In the current climate change context, setting up a real time spatial decision support system for flood prevention and management is more than a necessity. One of the components of this system would be represented by the anthropic influence on the water courses in the territory, respectively by the reservoirs, the regularization structures, the consolidation of the river banks, the water supply system, the use of land etc. The introductory part of the article presents literature related to the chosen subject, information on the spatial location of the study basin, as well as technical details on the spatial organization of the Firiza hydro-technical system. The following chapter shows the methodological structure and databases, which have made it possible to carry out the study. A particular emphasis is placed on the virtual environment (statistical, spatial modelling and hydrological/hydraulic modelling software). The study continues with the presentation of the anthropogenic influence structure, organized at detail level for each type of anthropic intervention separately, in a compatible format, connectable to the other modules related to the spatial system decision support. Relevant case studies on the restoration of liquid runoff, the degree of attenuation of the flood waves, the behavior of water uses and hydro-technical structures, etc., were done -elements that prove the efficiency of the functioning of the anthropic intervention components (analysis carried out based on data from the water resources monitoring network in the river basin). The conclusions reveal that the accuracy of future models (hydrological, optimization, hydraulic, potential damage assessment etc.) depends in good measure on the thorough knowledge of the components of anthropic influence on water resources, in addition to the quality of input data and the expertise of the hydrologist.

Correlation between precipitation and orography - key element of the Spatial Decision Support System for Prevention and Management of Floods in the Firiza Basin (Northwest Romanian Carpathians)

“…The relief and elevation variations in the Firiza watershed and surrounding mountain areas suggest a strong influence of topography on rainfall variability (Sabău et al, 2020); however, this effect has hardly been studied (Bazac, 1983) and without taking into account additional topographic parameters or the position of the rain gauges. Long-term records of rainfall are available for the Firiza watershed and the surrounding mountain area.…”

“…The subject of the present paper was determined by the desire to know in detail the characteristics of the most important input parameter in the hydrological forecast model, because the quality of the forecast depends equally on the accuracy of input data and the hydrologist's skills (Sabău et al, 2020).…”