ABSTRACT: Measured data on precipitation and air temperature is often not available in small mountainous catchments. Therefore, when applying rainfall-runoff models in these catchments, it is necessary to use meteorological input data from stations outside the catchment area. This paper presents comparison of BILAN model results based on input data from stations located within the catchment and those located outside. The model was used for both; (1) the entire Jalovecký brook catchment area of 45 square kilometers at a mean altitude of 1,166 meters above sea level and (2) for its mountain area of 22 square kilometers at a mean altitude of 1,500 meters a.s.l. Daily step simulations for the 2001 – 2010 hydrological years showed that runoff was better simulated, especially for the mountain catchment area, when precipitation and air temperature were calculated from data measured directly in the catchment. Although the BILAN model is relatively easy because it has only six parameters the possibility to obtain similar simulated runoff values with different input data is acknowledged. Therefore, critical evaluation of the modelled results should precede any conclusions based on simulated variables. It is also necessary to validate some simulated outputs documented by independent methods; especially those for base flow and groundwater storage recharge.
bibliografický odkaz na článok:
Porubská, D., Holko, L. & M. Fendeková, 2013: Vplyv vstupných údajov na výsledky simulácie zrážkovo-odtokového modelu.- Podzemná voda ISSN 1335-1052, 19, 2/2013, 78-90.
jazyk článku:
kľúčové slová:
Zrážkovo-odtokový model, horské povodia, vstupné údaje, model BILAN
key words:
Rainfall-runoff model, mountainous catchments, input data, the BILAN model