... Title, Hydrological drought characteristics of the Nedozery sub catchment, Upper Nitra, Slova... more ... Title, Hydrological drought characteristics of the Nedozery sub catchment, Upper Nitra, Slovakia, based on HBV Modeling, WATCH Technical. Author, Oosterwijk, J.; Loon, van AF; Machlica, A.; Horvát, O.; Lanen, van HAJ; Fendeková, M. Date, 2009. Language, English. Type, report ...
Interrelationships between surface and groundwater are very important for evaluation of natural g... more Interrelationships between surface and groundwater are very important for evaluation of natural groundwater sources. Final monitoring objects, constructed as a part of hydrogeological research tasks solution in the places, where regular monitoring network points are missing, often serve as a source of basic data for such analysis. These objects are very often monitored only for a very limited time period.
Statistical methods and mathematical modelling were used for assessment of geothermal water resou... more Statistical methods and mathematical modelling were used for assessment of geothermal water resources in the basin. Statistical analysis showed seasonal character of groundwater level fluctuation in wells tapping geothermal waters at Bojnice and the influence of shallower cold groundwater in some sources. Numerical model demonstrated that the exploitation rate from Bojnice should not exceed 27 l/s to keep groundwater level stabilised. The total amount of geothermal energy of the Hornonitrianska kotlina basin was estimated on 19.6 MWt.
... 3.1.3. HBV The HBV model (originally developed at SMHI (Bergström, 1976; Bergström, 1992; Ber... more ... 3.1.3. HBV The HBV model (originally developed at SMHI (Bergström, 1976; Bergström, 1992; Bergström and Forsman, 1973)) is a rainfall-runoff model, which includes conceptual numerical descriptions of hydrological processes at the catchment scale using various model ...
This study is oriented on using rainfall-runoff models for assessment of hydrological drought and... more This study is oriented on using rainfall-runoff models for assessment of hydrological drought and runoff simulations in the Upper Nitra River Basin. Three models were selected for this purpose: BILAN - lumped, conceptual model developed in Czech Republic, HBV - semi-distributed, conceptual model developed in Sweden and FRIER - physically based distributed model developed in Slovakia. The evaluation period last from from 1st of January 1981 to 31th of December 2007 in daily time step. Results show that models have a high Nash-Sutcliffe coefficient, which indicates a good agreement between observed and simulated discharge. In terms of droughts, BILAN model gave less but longer droughts because of a slow reaction of the model in each part of the hydrological cycle (surface, soil moisture, groundwater). FRIER outputs showed more, but shorter droughts, due to a faster reaction to precipitation than HBV and BILAN. Soil moisture drought was represented more realistic by FRIER than by BILAN...
Hydrological models are widely used tools to solve a broad range of hydrological issues. Each mod... more Hydrological models are widely used tools to solve a broad range of hydrological issues. Each model has its own structure defining inter-relationships of hydrological balance components, and comparative differences in the models’ inner structure must be taken into account when discrepancies result from the same data. Results of base flow simulation by three different models BILAN, FRIER and HBV-light were compared based on knowledge of the models’ internal structure. It was proven that the courses of modelled parameters are quite similar, but that the respective values differ. The highest base flow values were simulated by the BILAN model, due to the threshold value of the soil moisture storage incorporated within this model’s structure. The lowest values were obtained by HBV-light model. Simulated base flow values were compared with groundwater heads and minimum monthly discharges. This comparison showed that the base flow values in the Nitra catchment at Nedožery profile simulated...
The main goal of the research was to study differences in groundwater runoff parameters developme... more The main goal of the research was to study differences in groundwater runoff parameters development under different geological conditions, with the emphasis to extreme climatic conditions in dry years. Groundwater runoff parameters, represented by values of the base flow, groundwater recharge and groundwater storage were modelled using the BILAN model, which is a lumped parameter hydrological model. Three sub-catchments were selected – the Upper Nitra, Upper Poprad and Upper Topľa in the Western Carpathians. The catchments differ not only by geological, but also by climatic conditions. The results showed that the lowest groundwater runoff represented by the specific groundwater runoff values forms in the crystalline rocks of the Vysoké Tatry Mts. The highest values were obtained in the Upper Nitra River sub-catchment. Results obtained by hydrological model were compared with values of groundwater runoff calculated using the method of Kille and the BFI+2 model. Different years were i...
... Title, Hydrological drought characteristics of the Nedozery sub catchment, Upper Nitra, Slova... more ... Title, Hydrological drought characteristics of the Nedozery sub catchment, Upper Nitra, Slovakia, based on HBV Modeling, WATCH Technical. Author, Oosterwijk, J.; Loon, van AF; Machlica, A.; Horvát, O.; Lanen, van HAJ; Fendeková, M. Date, 2009. Language, English. Type, report ...
Interrelationships between surface and groundwater are very important for evaluation of natural g... more Interrelationships between surface and groundwater are very important for evaluation of natural groundwater sources. Final monitoring objects, constructed as a part of hydrogeological research tasks solution in the places, where regular monitoring network points are missing, often serve as a source of basic data for such analysis. These objects are very often monitored only for a very limited time period.
Statistical methods and mathematical modelling were used for assessment of geothermal water resou... more Statistical methods and mathematical modelling were used for assessment of geothermal water resources in the basin. Statistical analysis showed seasonal character of groundwater level fluctuation in wells tapping geothermal waters at Bojnice and the influence of shallower cold groundwater in some sources. Numerical model demonstrated that the exploitation rate from Bojnice should not exceed 27 l/s to keep groundwater level stabilised. The total amount of geothermal energy of the Hornonitrianska kotlina basin was estimated on 19.6 MWt.
... 3.1.3. HBV The HBV model (originally developed at SMHI (Bergström, 1976; Bergström, 1992; Ber... more ... 3.1.3. HBV The HBV model (originally developed at SMHI (Bergström, 1976; Bergström, 1992; Bergström and Forsman, 1973)) is a rainfall-runoff model, which includes conceptual numerical descriptions of hydrological processes at the catchment scale using various model ...
This study is oriented on using rainfall-runoff models for assessment of hydrological drought and... more This study is oriented on using rainfall-runoff models for assessment of hydrological drought and runoff simulations in the Upper Nitra River Basin. Three models were selected for this purpose: BILAN - lumped, conceptual model developed in Czech Republic, HBV - semi-distributed, conceptual model developed in Sweden and FRIER - physically based distributed model developed in Slovakia. The evaluation period last from from 1st of January 1981 to 31th of December 2007 in daily time step. Results show that models have a high Nash-Sutcliffe coefficient, which indicates a good agreement between observed and simulated discharge. In terms of droughts, BILAN model gave less but longer droughts because of a slow reaction of the model in each part of the hydrological cycle (surface, soil moisture, groundwater). FRIER outputs showed more, but shorter droughts, due to a faster reaction to precipitation than HBV and BILAN. Soil moisture drought was represented more realistic by FRIER than by BILAN...
Hydrological models are widely used tools to solve a broad range of hydrological issues. Each mod... more Hydrological models are widely used tools to solve a broad range of hydrological issues. Each model has its own structure defining inter-relationships of hydrological balance components, and comparative differences in the models’ inner structure must be taken into account when discrepancies result from the same data. Results of base flow simulation by three different models BILAN, FRIER and HBV-light were compared based on knowledge of the models’ internal structure. It was proven that the courses of modelled parameters are quite similar, but that the respective values differ. The highest base flow values were simulated by the BILAN model, due to the threshold value of the soil moisture storage incorporated within this model’s structure. The lowest values were obtained by HBV-light model. Simulated base flow values were compared with groundwater heads and minimum monthly discharges. This comparison showed that the base flow values in the Nitra catchment at Nedožery profile simulated...
The main goal of the research was to study differences in groundwater runoff parameters developme... more The main goal of the research was to study differences in groundwater runoff parameters development under different geological conditions, with the emphasis to extreme climatic conditions in dry years. Groundwater runoff parameters, represented by values of the base flow, groundwater recharge and groundwater storage were modelled using the BILAN model, which is a lumped parameter hydrological model. Three sub-catchments were selected – the Upper Nitra, Upper Poprad and Upper Topľa in the Western Carpathians. The catchments differ not only by geological, but also by climatic conditions. The results showed that the lowest groundwater runoff represented by the specific groundwater runoff values forms in the crystalline rocks of the Vysoké Tatry Mts. The highest values were obtained in the Upper Nitra River sub-catchment. Results obtained by hydrological model were compared with values of groundwater runoff calculated using the method of Kille and the BFI+2 model. Different years were i...
Uploads