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Evaluating Surface and Groundwater Drought Impact on Aquatic Habitat Quality in Torysa River, Slovakia

This study assesses the occurrence and impact of meteorological, surface water, and groundwater droughts on the aquatic habitat quality in the Torysa River catchment. The habitat suitability curves for the barbell fish species are derived using the IFIM methodology, and the RHABSIM model is used to calculate the minimum discharge required for habitat sustainability. The study also evaluates the influence of water abstraction on the Q90 value and identifies periods with discharge below the minimum flow threshold.

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Evaluating Surface and Groundwater Drought Impact on Aquatic Habitat Quality in Torysa River, Slovakia

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  1. Surface and groundwaterdroughtevaluation with respect to aquatic habitat quality applied in Torysa River catchment, Slovakia Miriam Fendekova1,Valeria Slivova2, BeataDemeterova 2,ViliamMacura3, ZlaticaZenisova 1, Marian Fendek 1, MilosGregor 1,Monika Jalcovikova 3 1Dept. of Hydrogeology, Faculty of Natural Sciences, Comenius University 2Slovak HydrometeorologicalInstitute 3Department of Land useand Water Resources Management, Faculty of Civil Engineering, SlovakUniversity of Technology Bratislava, Slovakia

  2. Study area location Upper part of the Torysa River catchment, Slovakia Fendekova, Slivova, Demeterova, Macura, Zenisova, Fendek, Gregor &Jalcovikova ComeniusUniversity, Slovak UniversityofTechnology and Slovak HydrometeorologicalInstitute in Bratislava, Slovakia

  3. Main issues • Meteorological drought occurrence analysis • Surface and groundwater drought occurrence assessment under both – natural conditions and conditions influenced by water abstraction, drought type classification • Habitat suitability curves derivationfor barbell (Barbuscarpathicus) in accordance to IFIM method • Calculation of stream flow minimum dischargesuitable for habitat sustainabilityusingthe RHABSIM model • Assessment of drought periods occurrence with the discharge below the minimum value Fendekova, Slivova, Demeterova, Macura, Zenisova, Fendek, Gregor &Jalcovikova ComeniusUniversity, Slovak UniversityofTechnology and Slovak HydrometeorologicalInstitute in Bratislava, Slovakia

  4. Heaviest abstraction Aquatic habitat quality measurements Natural conditions Fendekova, Slivova, Demeterova, Macura, Zenisova, Fendek, Gregor &Jalcovikova ComeniusUniversity, Slovak UniversityofTechnology and Slovak HydrometeorologicalInstitute in Bratislava, Slovakia

  5. Abstractionsinfluence on Q90 value Fendekova, Slivova, Demeterova, Macura, Zenisova, Fendek, Gregor &Jalcovikova ComeniusUniversity, Slovak UniversityofTechnology and Slovak HydrometeorologicalInstitute in Bratislava, Slovakia

  6. Aquatic habitat quality evaluation IFIM methodology RHABSIM model Fendekova, Slivova, Demeterova, Macura, Zenisova, Fendek, Gregor &Jalcovikova ComeniusUniversity, Slovak UniversityofTechnology and Slovak HydrometeorologicalInstitute in Bratislava, Slovakia

  7. Fendekova, Slivova, Demeterova, Macura, Zenisova, Fendek, Gregor &Jalcovikova ComeniusUniversity, Slovak UniversityofTechnology and Slovak HydrometeorologicalInstitute in Bratislava, Slovakia

  8. Fendekova, Slivova, Demeterova, Macura, Zenisova, Fendek, Gregor &Jalcovikova ComeniusUniversity, Bratislava, Slovakia

  9. CONCLUSIONS • Winter and summer drought develops in the catchment, winter droughts prevail • There is a distinct difference in drought occurrence in the headwater part of the catchment non affected by water abstraction and the downstream part • The value of 1.11 m3.s-1was estimated as the reference value of the combined measure of habitat suitability for barbell fish • The value of 0.300 m3.s-1was estimated as the minimum flow for barbell habitat quality preservation at Pecovska Nova Ves • There wereestimated14 periods with the discharge value below the habitat minimum flow Fendekova, Slivova, Demeterova, Macura, Zenisova, Fendek, Gregor &Jalcovikova ComeniusUniversity, Slovak UniversityofTechnology and Slovak HydrometeorologicalInstitute in Bratislava, Slovakia

  10. Thank you for your attention Fendekova, Slivova, Demeterova, Macura, Zenisova, Fendek, Gregor &Jalcovikova ComeniusUniversity, Slovak UniversityofTechnology and Slovak HydrometeorologicalInstitute in Bratislava, Slovakia

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