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2007 | 3 |
Tytuł artykułu

Modification of direct runoff in a small forest catchment of the Krajenskie Lakeland as a result of the watercourse development

Autorzy
Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The field investigations were carried out in a small forest catchment situated in the area of the Krajeńskie Lakeland, in the Lipka Forest District, the Biskupice Forest Range. The catchment covers the area of 182 ha; 95% is covered by forests and 5% by arable land and meadows. Field measurements comprised continuous recording of water level at the Thompson’s weir and weekly measurements of groundwater levels in ten wells. Construction development was introduced in the area of the watercourse during the conducted research: six damming devices (installations) constant weirs - were constructed there. The annual outflow coefficient from the catchment equals to 0.330. It confirms the necessity of developing the discussed watercourse in order to create the so-called small retention. However, no significant influence was found of the development on the water balance components of the catchment. The influence of the watercourse bank development can be clearly described by conducting an analysis of direct runoff. 14 recorded large floods were subject to analysis; 6 prior to the development and 8 following it. Each of the waves was described by applying Nash’s conceptual model. A constant number of 2 reservoirs in a cascade was assumed. Means of time-constants for high water waves after the development were higher by approx. 50% than for the waves prior to the construction. Resulting from it a hypothesis can be constructed here stating that the time of runoff water deposition in the catchment as a result of the weir development was significantly prolonged. It can be thus assumed that systems of small and basic weirs should be applied in forest small retention programmes.
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-
Rocznik
Numer
3
Opis fizyczny
p.87-97,fig.,ref.
Twórcy
autor
  • Department of Forest Engineering, The August Cieszkowski Agricultural University of Poznan, Mazowiecka 41, 60-623 Poznan, Poland
Bibliografia
  • Eagleson P.S. Hydrologia dynamiczna (Dynamic hydrology). PWN, Warszawa, 1978.
  • Miler A. Wymiar fraktalny sieci rzecznych w małych zlewniach Wielkopolski (Fractal dimension of river networks in small catchments of Wielkopolska region). Roczniki AR Poznań 268, Melioracje i Inżynieria Środowiska 15, cz.1, 255-266, 1994a.
  • Miler A. Modelowanie matematyczne zdolności retencyjnych małych zlewni nizinnych (Mathematical modeling of water storage capacities in small lowland catchments). Roczniki AR, Rozprawy Naukowe z.258, Poznań, 1994b.
  • Miler A. Zastosowanie metody Konstantinowa do obliczania parowania terenowego w zlewniach rzecznych (An application Konstantinow method to calculation of field evaporation in river catchments). Materiały II Ogólnopolskiej Konferencji Naukowej - Przyrodnicze i techniczne problemy ochrony i kształtowania środowiska rolniczego. Poznań – Sielinko, Wydawnictwo AR Poznań, 125-130, 1997.
  • Nash J.E. Determining runoff from rainfall. Proc. of Institution of Civil Engineers, 10, 1958.
  • Ostrowski J.A. Modelowanie hydrogramów wezbrań opadowych w małych zlewniach niekontrolowanych na podstawie sieci zlewni reprezentatywnych (Modeling of risings rainfall hydrographs in small not controlled catchments on the ground of representative catchments net). IMGW. Wiadomości IMGW. cz. I-V, 1987-88.
Uwagi
PL
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Typ dokumentu
Bibliografia
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