Applicability of TOPMODEL in the mountainous catchments in the upper Nysa Kłodzka river basin (SW Poland)

Abstract

River basins located in the Central Sudetes (SW Poland) demonstrate a high vulnerability to flooding. Four mountainous basins and the corresponding outlets have been chosen for modeling the streamflow dynamics using TOPMODEL, a physically based semi-distributed topohydrological model. The model has been calibrated using the Monte Carlo approach-with discharge, rainfall, and evapotranspiration data used to estimate the parameters. The overall performance of the model was judged by interpreting the efficiency measures. TOPMODEL was able to reproduce the main pattern of the hydrograph with acceptable accuracy for two of the investigated catchments. However, it failed to simulate the hydrological response in the remaining two catchments. The best performing data set obtained Nash-Sutcliffe efficiency of 0.78. This data set was chosen to conduct a detailed analysis aiming to estimate the optimal timespan of input data for which TOPMODEL performs best. The best fit was attained for the half-year time span. The model was validated and found to reveal good skills.

Hydrological Modeling in Tropical Regions via TopModel. Study Case: Central Sector of the Middle Magdalena Valley - Colombia

“…For the process of the model validation, results generated from the calibrated parameters with higher NSE values gave efficiency values near to 0.73 and its simulated flows. The NSE values found are close to the values obtained for a proven models in Ecuador, Colombia, Poland, Nepal and China with efficiency values near to 0.7 (Sigdel et al, 2011;Padrón et al, 2015;Gil Morales and Tobón Marín, 2016;Jeziorska and Niedzielski, 2018;Xue et al, 2018).…”

“…The model theory assumes that the local hydraulic gradient is equal to the local surface slope and implies that all points with the same value of the TWI have the same hydraulic properties (Andersen, Refsgaard and Jensen, 2001;Mukherjee et al, 2013;Yi, Zhang and Yan, 2017;Jeziorska and Niedzielski, 2018). Its value is computed from the basin topography using [1].…”

“…Upslope contributing area represents the area that can potentially produce runoff to the point of interest (Suliman et al, 2016;Jeziorska and Niedzielski, 2018).…”

“…The generation of runoff in TopModel is given by a relation between the topography and the transmissivity of the basin (Dewandel et al, 2017;Jeziorska and Niedzielski, 2018;Xue et al, 2018). Rain infiltrates the root zone (figure 1) until its maximum storage capacity is reached, and then it can be reduced to a linear velocity by the actual 100 evapotranspiration of the surface, described by [2].…”

Spatial Variabilities of Runoff Erosion and Different Underlying Surfaces in the Xihe River Basin

“…On the other hand, the effect of different factors on erosion and sediment yield is analyzed based on physical and hydrological models [20][21][22][23][24][25]. For example, Jeziorska [26] estimated that the optimal timespan is half a year for the TOPMODEL to perform at its best in the Central Sudetes (SW Poland). Sheng et al [27] investigated the hydrological impacts of changes in land use and precipitation by using a MIKESHE model in the Chaohe watershed, China.…”