Directions and timing of the material fluxes on the floodplain [case study of Vistula River valley near Plock, Poland]

• Autorzy: Magnuszewski A.
• Języki publikacji: EN

Abstrakty

EN

In the hydrological cycle of river valley a vertical water fluxes are controlled by climate (precipitation and evapotranspiration). In the Vistula river valley near Plock periods of water recharge, surplus and deficit in the valley landscape units has been determined using Thornthwaite water balance method. A good tracer of that process is Cl and NO3 concentration in the ground water. Concentration of these elements in ground water varies depending on the landscape unit, under the dune fields is lowest due to a good recharge ratio. In all units lowest concentration of NO3 in the ground water are observed in a spring time due to a dilution effect in the period of water surplus in the fluvial system. In the chemistry of small creek Nida representing lateral river runoff reaching main valley a similar to ground water chemistry pattern has been observed. A lowest concentration of Cl (30-40 mg dm-3) and PO4 (0.25-1 mg dm-3) occur in spring time due to a dilution effect. Highest concentrations of Cl (50-70 mg dm-3) occur in late summer and fall. Spring time with a high runoff produces the highest loads of nutrients. Wetland on the floor of the Vistula river valley located in the lower reach of Nida catchment acts as a natural trap of the nutrients. It lowers concentration of PO4 during low flows by 55% and NO3 by 35 % Efficiency of reduction depends on the river discharge.

Słowa kluczowe

EN

flood plain; river valley; water quality; Poland; ecotone; Vistula River; ecohydrology; water resource; Plock town

• Wydawca: -
• Czasopismo: International Journal of Ecohydrology and Hydrobiology
• Rocznik: 2002
• Tom: 02
• Numer: 1-4
• Opis fizyczny: p.265-270,fig.,ref.

Twórcy

autor

Magnuszewski A.

• Warsaw University, Krakowskie Przedmiescie 30, 00-927 Warsaw, Poland