Budoucí změny v sezónní sněhové pokrývce a její dopady na jarní a letní odtok z horských povodí
| Název práce v češtině: | Budoucí změny v sezónní sněhové pokrývce a její dopady na jarní a letní odtok z horských povodí |
|---|---|
| Název v anglickém jazyce: | Future changes in seasonal snowpack and impacts on spring and summer runoff in mountain areas |
| Klíčová slova: | změny klimatu, sněhová pokrývka, odtok ze sněhu, nízké průtoky |
| Klíčová slova anglicky: | climate changes, snow cover, snowmelt runoff, low flows |
| Akademický rok vypsání: | 2018/2019 |
| Typ práce: | disertační práce |
| Jazyk práce: | čeština |
| Ústav: | Katedra fyzické geografie a geoekologie (31-330) |
| Vedoucí / školitel: | doc. RNDr. Michal Jeníček, Ph.D. |
| Řešitel: | RNDr. Ondřej Hotový - zadáno vedoucím/školitelem |
| Datum přihlášení: | 03.10.2018 |
| Datum zadání: | 08.10.2018 |
| Předběžná náplň práce |
| Alpine catchments are largely influenced by snow, but it is expected that an increasing proportion of the precipitation will fall as rain in the future. Consequently, snow storage is expected to decrease, which, together with changes in snowmelt rates and timing, might cause reductions in spring and summer low flows. Many studies show that changes in seasonal snowpack and their influence on annual/seasonal runoff are widely investigated. However, there is still limited information of how snowpack changes impact runoff extremes, such as low flows in the warm period and how this relation will change with predicted changes in air temperature and precipitation. Therefore, the objective of this phd project is 1) to quantify how long snowmelt affects runoff during warm period, 2) to simulate the effect of predicted increase in air temperature and thus decrease in snowfall fraction on spring and summer low flows and 3) to explain the role of catchment attributes on low flows sensitivity. The project solution will combine statistical analysis of long-term observations from selected mountain catchments in central Europe. Modelling approaches will be used to simulate the effect of predicted climate change on snow and groundwater storage and consequent runoff (using results from regional climate models based on selected Representative Concentration Pathways). This enables to identify areas potentially affected by the mentioned future hydrological change. |
| Předběžná náplň práce v anglickém jazyce |
| Alpine catchments are largely influenced by snow, but it is expected that an increasing proportion of the precipitation will fall as rain in the future. Consequently, snow storage is expected to decrease, which, together with changes in snowmelt rates and timing, might cause reductions in spring and summer low flows. Many studies show that changes in seasonal snowpack and their influence on annual/seasonal runoff are widely investigated. However, there is still limited information of how snowpack changes impact runoff extremes, such as low flows in the warm period and how this relation will change with predicted changes in air temperature and precipitation. Therefore, the objective of this phd project is 1) to quantify how long snowmelt affects runoff during warm period, 2) to simulate the effect of predicted increase in air temperature and thus decrease in snowfall fraction on spring and summer low flows and 3) to explain the role of catchment attributes on low flows sensitivity. The project solution will combine statistical analysis of long-term observations from selected mountain catchments in central Europe. Modelling approaches will be used to simulate the effect of predicted climate change on snow and groundwater storage and consequent runoff (using results from regional climate models based on selected Representative Concentration Pathways). This enables to identify areas potentially affected by the mentioned future hydrological change. |