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National Repository of Grey Literature 3 records found  Search took 0.01 seconds. 
Energy balance of the snowpack: Case study Bystřice River basin (Krušné Mountains)
 Matějka, Ondřej ; Jeníček, Michal (advisor) ; Ducháček, Libor (referee)
Energy budged of the snowpack: Case study of the Bystřice River basin (Krušné Mountains) The aim of this thesis is to describe and calculate the energy budget of snowpack which is one of the approach to snowmelt simulation. The focus is on physical basis of the accumulation and melting of the snowpack. The second aim is to select and apply of such a mathematical expression of the energy budged of snow which provides best fits of the available data set from Hřebečná climatological station in Bystřice River basin in Krušné Mountains. Calculation of point snowmelt and rainfall data measured for the winter season 2011/2012 were used to simulate the snow water equivalent. As the main heat flows that affect the melting of snow in the area have been identified flows caused by shortwave radiation and latent heat. The development of heat flows during the winter period in 2011/2012 was founded. Most obvious development is demonstrated by the proportion of short-wave radiation to the total energy budget. The defects of the measurement of daily precipitation amounts and measurements of snow mass were revealed. Therefore the requirement of identifying the causes of incorrect measurements of snow mass at the climatological station Hřebečná was revealed. Key words: snowpack, snowmelt modelling, energy budget of...
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Energy balance of the snowpack: Case study Bystřice River basin (Krušné Mountains)
 Matějka, Ondřej ; Jeníček, Michal (advisor) ; Ducháček, Libor (referee)
Energy budged of the snowpack: Case study of the Bystřice River basin (Krušné Mountains) The aim of this thesis is to describe and calculate the energy budget of snowpack which is one of the approach to snowmelt simulation. The focus is on physical basis of the accumulation and melting of the snowpack. The second aim is to select and apply of such a mathematical expression of the energy budged of snow which provides best fits of the available data set from Hřebečná climatological station in Bystřice River basin in Krušné Mountains. Calculation of point snowmelt and rainfall data measured for the winter season 2011/2012 were used to simulate the snow water equivalent. As the main heat flows that affect the melting of snow in the area have been identified flows caused by shortwave radiation and latent heat. The development of heat flows during the winter period in 2011/2012 was founded. Most obvious development is demonstrated by the proportion of short-wave radiation to the total energy budget. The defects of the measurement of daily precipitation amounts and measurements of snow mass were revealed. Therefore the requirement of identifying the causes of incorrect measurements of snow mass at the climatological station Hřebečná was revealed. Key words: snowpack, snowmelt modelling, energy budget of...
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Methods of modelling the runoff from snow cover. Case study: Headwater area of Bystřice River
 Hasa, Martin ; Jeníček, Michal (advisor) ; Taufmannová, Alice (referee)
This bachelor thesis deals with the issue of modelling the runoff from melting snow. The main objective is to evaluate two basic methods: degree-day approach and energy balance method. Part of the thesis is the application of degree-day approach in the headwater area of Bystřice River in the Krušné Mountains. Degree day factors were calculated using air temperature and flow rates in the closure profile for the spring snowmelt period in years 2009 and 2010. Degree Day factors were used for modelling the runoff from melting snow. Study results were compared with the findings published in the literature. Key words: temperature index, degree-day approach, energy balance of snow cover, snowmelt modelling
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