Odnawialność systemu wodonośnego zlewni Prosny według badań modelowych i oceny odpływu podziemnego metodami hydrologicznymi

Abstract

Renewability of the water Prosna river catchment water-bearing system based on modelling and assessment of groundwater runoff using hydrological methods.A b s t r a c t . This paper presents the results of renewability research and evaluation of groundwater runoff in the Prosna river catchment of. The drainage basin is characterized by a considerable variation in geomorphology, hydrography and geology. The evaluation of groundwater renewability has been compared using both hydrological methods and mathematical modelling. Hydrological research consisted of genetic separation of the hydrograph for 1951–1980, and the Wundt and Kille methods based on low river flows for 1981–2010. Mathematical modelling has been conducted for the hydrodynamic state for 2014. The obtained results show a high convergence of about 3.7% in the case of the methods: Wundt, genetic separation hydrograph and mathematical modelling methods. On the contrary, a divergence of about 8–11% can be observed between these methods and the Kille method. Tables 1 and 2 present the results of renewability and groundwater runoff research in the Prosna river catchment. In conclusion, the mathematical modelling methods are considered as the most reliable for the evaluation of renewability and groundwater resources in catchments, due to spatial and various multilayer groundwater circulation systems.