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Flash floods as theme for the summer periods in next decades
Buchtele, Josef ; Tesař, Miroslav ; Chlumecký, M. ; Fořtová, Magda
The variability of water regime in the annual cycle is influenced not only by the annual development of the vegetation cover, but also by its increases in the span of several decades. In the actual year it has been twelve years ago when the disastrous floods appeared in the Labe River, and more than fifteen years from destructive inundations in the Morava River basin, and so it is reasonable to remind those situations in the context with the recent flood. The modeling of rainfall-runoff process is the tool for the evaluation of the possible changes in the water regime in the mentioned landscape development.
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Vliv klimatických změn na množství a kvalitu vodních zdrojů a na hydrologické poměry v ČR
Výzkumný ústav vodohospodářský T.G. Masaryka, Praha ; Blažková, Šárka ; Buchtele, Josef ; Přenosilová, Eva ; Kos, Zdeněk ; Kněžek, M. ; Havel, Ladislav ; Krátká, Martina ; Kašpárek, Ladislav
Zpráva za rok 2002 obsahuje dvě základní části. První má charakter metodiky a upřesňuje postup řešení úkolu. Druhá část obsahuje výsledky z řešení v roce 2002 za jednotlivé dílčí úkoly: DÚ 01 Výpočty scénářů a zhodnocení změn hydrologického režimu v povodích, DÚ 02 Výpočty scénářů a zhodnocení změn hospodaření v nádržích, DÚ 03 Vliv klimatických změn na režim extrémních odtokových situací, DÚ 04 Vliv klimatických změn na kvalitu vody.
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Influence of the development of vegetation cover in the basin on the regime of surface water and groundwater resources
Buchtele, Josef ; Tesař, Miroslav
Variability of water regime is influenced usually not only by the changes of vegetation cover in the annual cycle, but also by the vegetation development in the span even of several decades. The resulting evapotranspiration requirement depends on actual climatic conditions; moreover the needs of soil moisture and the oscillation of solar radiation are also significant. The simulations of rainfall–runoff process have been used with the intention to follow the role of the developing vegetation cover and long-term climatic fluctuations. The differences between monitored and simulated runoff in the relatively long periods are the possible tool for the appraisal of changes in the water regime, which are influenced also by the changes of evapotranspiration need.
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Variability of water regime in forested experimental basis
Buchtele, Josef ; Tesař, Miroslav
Climatic conditions represent a significant factor for water regime of a watershed. They form conditions both for the vegetation cover development in the annual cycle and also its changes in the span of decades of years. Land-use changes can be a reason of variability and/or tendencies in the evapotranspiration process affecting water balance in both short-term and long-term temporal scales. The present contribution deals with simulations of the rainfall-runoff process with the help of SAC-SMA (Sacramento Soil Moisture Accounting) a BROOK´90 models. The time course of differences between observed and simulated runoff represents a possible tool for the evaluation of tendency and/or variability of water regime of a basin. The used approach makes possible to assess a result of long-term development of the vegetation cover in a catchment and consequent evapotranspiration changes.
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