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Determination of effective rainfall and maximum flows in small non-urban catchments
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Abstrakty
This paper presents application of HEC-HMS model that was used to calculate a pick flow for a small, non-urban catchment. The Debina catchment with 47.8 km2 area is located in a central part of Gnieznienskie Lakeland region. In this area Luvisol made from moraine materials (50%) and Brunic Arenosol (23%) under forest predominates. The rest of the catchment is covered by Histic Glyesol and Histosol. Obtained data from Corine Land Cover was used to quantify landuse structure in the studied catchment. The results showed that 77% of area is used as an arable land and around 20% as a belt of woodland with greens. Calculations of the effective rainfall were performed using four methods: SCS curve number (CN), Green and Ampt, initial and constant and deficit and constant method. The scale of the effective rainfall calculated by these four methods implemented in HEC-HMS hydrologic model showed a large divergence. Significant differences of the effective rainfall values translate into discharges values which are calculated on their basis. The peak flow of probability of exceedance of 10% in the Debina stream may have values which oscillate between 4.1 m3.s-1 and 0.6 m3.s-1 depending on the effective rainfall determination method. In case of 1% rainfall, peak discharges oscillate between 11.9 m 3.s-1 and 0.8 m 3.s-1. Flows calculated using SCS CN method are comparable to the values of maximum flow calculated using empirical formulas (Stachy and Fal and Debski and Stachy) which amount Q(1%) = 6.6 m3.s-1 and Q(10%) = 3.8 m3.s-1. Calculations of the peak flows in the Debina catchment indicate that the selection of methods that determine effective rainfall as a component of rainfall-runoff model has a significant influence on the maximum flow values.
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Rocznik
Tom
Strony
572--581
Opis fizyczny
Bibliogr. 9 poz., tab., rys.
Twórcy
autor
- Uniwersytet Przyrodniczy, Poznań
autor
- Uniwersytet Przyrodniczy, Poznań
autor
- Uniwersytet Przyrodniczy, Poznań
Bibliografia
- 1. Banasik K.: Wyznaczanie wezbrań powodziowych w małych zlewniach zurbanizowanych. Wydawnictwo SGGW, 40. Warszawa 2009.
- 2. Bogdanowicz E. i Stachy J.: Maksymalne opady deszczu w Polsce, charakterystyki projektowe. Mat. Bad. IMGW 23 seria Hydrologia i Oceanologia 85, 1998.
- 3. Ciepielowski A., Dąbkowski S.: Metody obliczeń przepływów maksymalnych w małych zlewniach rzecznych (z przykładami). Oficyna Wydawnicza ProjprzemEKO, 311. Bydgoszcz 2006.
- 4. Feldman A.D. (red.): Hydrologic Modeling System HEC-HMS Technical Reference Manual, USACE, Hydrologic Engineering Center, Davis, 155, 2000.
- 5. Kondracki J.: Geografia regionalna Polski. Wydawnictwo Naukowe PWN, 468. Warszawa 2009.
- 6. Mocek A., Drzymała S.: Geneza, analiza i klasyfikacja gleb. Wydawnictwo UP w Poznaniu, 418. Poznań 2010.
- 7. Scharffenberg W.A., Fleming M.J.: Hydrologic Modeling System HEC-HMS User’s Manual, USACE, Hydrologic Engineering Center, Davis, 278, 2006.
- 8. Ramowa Dyrektywa Wodna 2000/60/WE z dnia 23 października 2000 r.
- 9. USACE: Flood-runoff analysis, EM 1110-2-1417. Office of Chief of Engineers, Washington, DC, 1994.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-962ea018-bb18-48ca-ada7-daff0f0b08a3