Estimation of magnitudes of debris flows in selected torrential watersheds in Slovenia

Digital terrain models and mathematical modelling of debris flows

“…Določanje magnitude drobirskega toka je zelo zahtevna naloga, saj v nasprotju s poplavami poleg padavin na količino materiala vpliva več dejavnikov, kot so geološka sestava povodja, naklon, ukrivljenost površja, plazljivost terena, padec struge vodotoka (Sodnik in Mikoš, 2006). V raziskavi sta prikazana vpliv različnih tipov topografskih podatkov na rezultate modela in metoda za njihovo izboljšavo.…”

Modeling of a debris flow from the Hrenovec torrential watershed above the village of Kropa

“…It is followed by an assessment of a possible debris-flow magnitude and about appropriate methods we have already reported in this journal (Sodnik and Miko{ 2006). We finish a risk assessment by modeling debris flow movement from a source area and by determining debris-flow runout.…”

“…Input data for the model were daily rainfalls (Table 1) and topographic data that were gained from the topographic maps in the scale of 1:5,000 and the digital ortho-photo maps as follows: contributing area 1.065km 2 , average slope inclination 30°, watercourse length (of the torrential channel) 1.37 km, average watercourse slope (of the torrential channel) 30°. On the basis of the digital ortho-photo (soil cover) and using experiences with run-off modeling in other torrents in Slovenia (Sodnik and Miko{ 2006), we determined for the Hrenovec torrential watershed with regard to soil cover the run-off coefficient CN (Curve Number) = 66. For determining the direct input data into the hydrologic model HEC-HMS we applied the SCS (Soil Conservation Service) method that proved to be adequate also in other torrential watersheds in Slovenia (Sodnik and Miko{ 2006).…”

“…For rainfall-runoff modeling we applied a hydrologic model HEC-HMS (Hydrologic Modeling System;HEC 2000; that was successfully applied when modeling surface run-off as a part of the determination of debris-flow magnitudes in selected torential watersheds in Slovenia (Sodnik and Miko{ 2006). Input data for the model were daily rainfalls (Table 1) and topographic data that were gained from the topographic maps in the scale of 1:5,000 and the digital ortho-photo maps as follows: contributing area 1.065km 2 , average slope inclination 30°, watercourse length (of the torrential channel) 1.37 km, average watercourse slope (of the torrential channel) 30°.…”

Limnological characteristics, water regime and water quality problems of Borkovac reservoir (Vojvodina, Serbia)

“…However, several studies regarded to different water use problems in the region, mostly in Slovenia (Smrekar 2006;Sodnik andMiko{ 2006, Vovk-Kor`e andVrhov{ek 2006;Frantar 2007;Breg et al 2007;Polajnar 2008;Sahin 2009;Keesstra et al 2009;Zorn 2009) were published during the last several years. Due to geographical similarities experiences from current Slovenian hydrological research can be applied also in Serbia.…”