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Event-based rainfall-runoff modelling of the selected river basin
TICHÁČEK, Pavel
This thesis deals with the event-based rainfall-runoff modelling of the selected river basin. This thesis is based on my previous work "Factors affecting the water discharge from the river basin during rainfall-runoff events". In that work I described factors, which have effect on water runoff from the river basin. This thesis was solved on basin of Jílecký stream. Water runoff from basin is affected with a number of factors, the most significant are slope of the terrain, soil saturation, geological and pedological conditions, vegetation cover and anthropogenic influence. Calculations of direct runoff were realised with method of CN curves, with using BPEJ map, land use map gained from Corine Land Cover 2006 and maximum daily precipitation sums with 2, 10, 20, 50 and 100 years probabilities recurrence obtained from the rainfall station Netřebice. Calculations were performed in a numerical method using vector data and a raster method performed in ArcMap. In the next step I performed simulations of various scenarios of change in river basic characteristics such as soil saturation change, grassing of arable land with a slope greater than 12°, grassing of all arable land and enlargement the built-up area in the river basin.
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Analysis of factors affecting the direct runoff
VLASÁK, Ivo
This diploma thesis deals with the analysis of the factors which influence the direct drainage from the drainage area. The thesis specifically deals with the drainage area of the Kopaninský brook. Drainage is always influenced by several factors at the same time. These factors are above all climate, anthropogenic impact, underdrainage, shape and extent of a drainage area, land use, geologic structure, location and altitude of a drainage area. The direct drainage can be separated by different methods (modificated semi-graphical method, GROUND method, method of hydrogram separation, method of digitals filtres) or CN- curves can be used for calculation. This thesis used the method of CN curves to process the results of a given drainage area. In the methodical part of the thesis I reached to the creation of direct drainage maps with the utilisation of the BPEJ maps together with the input data gained by the method of CN curves. These outputs were created at different values of design rains repetition time N= 2, 10, 50 and 100 years. The volume of a direct drainage was calculated by a classic method and by a method using the ArcMap programme. Another part of the thesis was simulation of different area utilisation situations (real condition versus grassing of ploughland) and saturation of drainage area, or more precisely water content in soil (dry soil, middle dry soil, wet soil).
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Ochrana a organizace povodí v Tvarožné Lhotě
Kučerová, Svatava
The bacher thesis has summarized the findings of water and wind erosion . Interests location was the village Tvarožná Lhota, which was analyzed in the current state of land use. There has also determined the vulnerability of land to water erosion for long-term loss of land and in the event of heavy rains. To calculate long-term loss method has used the method of drainage lines and calculation in ArcGIS. For the calculation of soil loss from heavy rains has used the method CN- curve.
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Teoretical documents to determining transport erosion for design rainfall
BERKA, Martin
This thesis is focused on erosion and its succesive elimination as antierosion measures. The area of interest is in the cadastral territory of Čížov u Jihlavy. For the calculation of the erosion threat was used the Wischmeier-Smith equation. The proposal has the influence of several factors. It´s rainfall, vegetation cover, soil characteristics, morphology, and other.
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Verification of effeciency of GAEC II measures on specific catchment using model based on SCS-CN.
HRDINA, Filip
The erosion is one of the biggest problems of today?s agriculture, more precisely of environment. At the time when 50% of the arable soil is threatened by the erosion, initiative of the erosion protection increases at the national and at the Europien level. The aim of this bachelor?s work is to evaluate the effectiveness of erosion controls which were issued within Good agricultural and environmental condition (GAEC 2) by the Europien Union. The ERCN program and HydroCad program are used as the modeling techniques, modeling the impact of the erosion measures in 4 scenarios. The modal area is the subcatchment P6 on the catchment of Kopaninský stream. The issues of the erosion, the erosion standard GAEC 2 and hydrological modeling using methods of CN-Curve Numbers are solved in the literature review.
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