Lower Odra Research Articles

Input-output Balances of Nutrients and Plankton in a Flooded Area of the Lower Odra

The retention of particulate matter of the Odra River in flooded areas was estimated by determining suspended particulate matter (SPM) elimination and particle-bound nutrient retention in a polder area of the Lower Odra Valley national park. Water and suspended matter samples collected before, during, and after the 1997 summer flood at the inlet and the outlet of the investigated polder (Polder A/B close to Schwedt) offer the opportunity to balance the matter retention inside the floodplain. The maximum level of retained SPM (more than 80%) was calculated for the record flood of summer 1997, while in ordinary winter floods retention differs between 33% and 70 %, Basic properties of the flowing particles like settling velocity, density, loss on ignition etc. change on their way through the polder area. In the investigated Polder A/B a retention of at least 50% of particle-bound phosphorus which was independent of the incoming suspended matter load from the Odra River was observed. The retention of particle-bound nitrogen and carbon varied seasonally to different extents. The presented balance demonstrates that particle-bound nutrient retention in polders is an important factor in the self-purification process of the river system. Some additional effort was done to study changes of plankton composition; during a joint field experiment in spring 1998, the authors determined biological parameters (abundance and biomass of phytoplankton and zooplankton) of water samples at polder inflow and outflow points.

The Odra River Load of Heavy Metals at Hohenwutzen during the Flood in 1997

The Odra river flood of 1997 was a rare hydrological as well as an interesting sedimentological event. At Hohenwutzen (Lower Odra River) we observed the suspended particulate matter transport and the temporal development of water and solids' pollution with heavy metals and As. While the suspended particulate matter concentration decreased the trace element concentrations increased during the flood by fractionation of particles and solution processes. Because of a successive flooding of differently contaminated sedimentary sources and polluted regions the contents of heavy metals developed irregularly. Their median particulate concentrations did not exceed the values of older samples taken under mean discharge conditions between 1989 and 1995. The dissolved amounts correspond to those ofthe Elbe river in 1990. During the flood the dissolved share of all analyzed total element contents increased. The total loads increased 4fold (Cr) to 17fold (Cd).

Period of downstream migration of sea trout (Salmo trutta L.) smolt grown in Gowienica River

The period and intensification of downstream migration of sea trout smolts (Salmo trutta L.) grown in natural condition in the drainage basin of (Gowienica River, being a part of lower Odra system (in 5 consecutive years: 1980-1984), as well as water temperature in the lower section of Gowienica in this period is demonstrated in the present paper.

Sea trout (Salmo trutta L.) and salmon (Salmo salar L.) catches in the lower Odra River system as well as stocking in the years 1973-1987

The paper presents and analyses catches of sea trout and salmon in the lower Odra River system during the period of 1973-1987. Both of the fish species had to be treated jointly for complying with the economic statistics, having been the source of information concerning the catches. The variations of catches were taken into account with regard to years, months as well as regional division. More over data were accumulated as to the stocking of the lower Odra water system with sea trout and salmon during the period of studying the catches.

Z badań nad tzw. horyzontem starosznurowym w rozwoju późnoneolitycznej kultury społeczeństw Kujaw

The problem of the so-called pan-European horizon of the Corded Ware culture in Kuyavia, discussed here, is occasioned by the publication of an Early Corded Ware grave from Krusza Zamkowa. Bydgoszcz province, site 3 (Figs. I -3). The analysis of available sources associated with that horizon indicates that the set of attributes regarded as distinctive was in Kuyavia a constant component of the Funnel Beaker groups such as Eastern, Mątwy. Radziejów and so-called epi-Funnel-Beaker, differentiated chronologically and genetically. Thus the set was rather an indicator of the exogenous component generally associated with the area between the Vistual and the Dnieper, and playing an unspecified culture-forming role in the autogenesis of local communities. The fact remains that a large majority of local communities of the „classic” Corded Ware horizon show opposite genetic links, tending towards "Baltic" centres, notably those in the area between the lower Odra and the Elbe.

Genesis of lower Odra River Valley as a factor for estimating its engineering geological conditions

Presenting the development of Lower Odra River valley near Szczecin (Poland) the author has found that Odra River did not shape—at the tested section—the river bed of typical, erosional-accumulative fluvial progress. The valley, shaped as the result of postglacial liquation processes, has been utilisazed as the flow tank of initially melt river waters.

On the occurrence of salmon (Salmo salar L.) in the Szczecin Firth and the lower Odra in 1977

The paper summarises data on numbers, weight, regions and seasons of capture of salmon (Salmo salar L.) within the Polish part of the Szczecin Firth and the lower Odra in 1977. The fishes caught are considered in terms of their respective affiliation to the spawning and post-spawning stocks.

Occurrence of salmon (Salmo salar L.) in the Szczecin Firth and Lower Odra in 1976

Occurrence of salmon (Salmo salar L.) in the Szczecin Firth and Lower Odra in 1976

Occurrence of salmon (Salmo salar L.) in the Szczecin Firth and Lower Odra in 1975

The present paper contains numbers, weights as well as regions and seasons of capture of salmon, Salmo salar L. caught in the Polish part of the Szczecin Firth and Lower Odra in 1975. Affinity of the fishes caught to the spawning and post-spawning stocks is discussed as well.

The occurrence of salmon (Salmo salar L.) in the Szczecin Firth and lower Odra in1974

The occurrence of salmon (Salmo salar L.) in the Szczecin Firth and lower Odra in1974

The occurrence of salmon (Salmo salar l.) in the Szczecin Firth and lower Odra in 1973

The present paper deals with numbers and weight of salmon (Salmo salar L.) as well as with regions and seasons of fishing for this species in the Polish part of the Szczecin Firth and lower Odra in 1973. An attempt was made to compare the intensities of trout and salmon fisheries during the spawning migration of both species.

Salmon (Salmo salar L.) and trout (Salmo trutta L.) fishing and stocking in the lower Odra River system

Salmon (Salmo salar L.) and trout (Salmo trutta L.) fishing and stocking in the lower Odra River system