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Warunki przywracania struktury siedlisk dla ryb na odcinku Wisłoki w km 73+200 - 42+600

Bartnik W., Książek L., Jelonek M., Sobieszczyk P., Florek M., Hawryło A., Leja M., Strużyński A., Strutyński M., Wałęga A., Wyrębek M., Wiśniewolski W., Parasiewicz P., Prus P., Adamczyk M., Depowski R.

Gospodarka Wodna

2015

Nr 5

147--152

W artykule przedstawiono zadania stanowiące część projektu „Przywrócenie drożności korytarza ekologicznego rzeki Wisłoki i jej dopływów. Koncepcja obejmuje struktury ułożenia głazów, wraz z określeniem potrzebnej objętości głazów i żwirów. W wyniku podjętych działań możliwe było określenie struktury i powierzchni zarówno siedlisk, jak i tarlisk dla ryb.

The article presents the tasks constituting part of the „Restoration of perviousness of the ecological channel of the Wisłoka River and its tributaries" project. The concept includes rock layout structures and defines the necessary volume of rocks and gravel. The undertaken steps allowed for determination of the structure and surface of fish habitats and spawning sites.

Równowaga hydrodynamiczna ważnym parametrem kształtującym stan ekologiczny cieków karpackich

Strużyński A., Bartnik W., Kulesza K., Czoch K.

Rocznik Ochrona Środowiska

2013

Tom 15, cz. 3

2591--2610

According to the Water Framework Directive human activities should lead to an improvement or at least stabilizing of water ecosystems. Due to the adaptive nature of living species, reference conditions specified under the WFD for mountain river should be tested after reaching of proper hydromorphological parameters. The hydrodynamical balance of mountain river channel is reflected by it's plan view as well as by vertical and cross-sectional layouts. Mountain river in natural conditions produce a clearly defined riffle and pool system and can create a variety of channels with bars. Fluvial processes occurring in mountain rivers differ much from those that occur in lowland rivers. Beds of mountain rivers and streams, due to the water flow in high bed relative roughness conditions, are sensitive to changes in the bed material composition, size and shape. In these circumstances, bedforms are not created. While low and medium flows, there is no sediment transport, and only minor grain hide, sorting and armoring processes form the top of the bed. Granulometric curve changes depend on variations in several parameters. During the process of creating or removing the armored layer, the variation of fractions describing bed stability and water flow conditions exist. In a changing regime of watercourses functioning with the rough bottom, the standard deviation of the curve correctly reflects the bed material sorting processes. Armored bottom exists for it's values less than 1.6, and in the natural conditions the value does not fall below 1.3. In this case, fine material is almost completely removed from the bottom of the cover. Below the reaches of river sources, which are the steepest sections of mountain streams, riverbeds mostly achieve hydrodynamic balance and this is the optimal condition for the development of the aquatic ecosystem. When the incised channel, with armored bottom in alluvial river is found, it often shows a limited supply of bed material. Many factors can affect the change of the river channel so the stable morphological state occurs after some time, and after many oscillations around the optimal condition. It is a period of a few to tens of years. In any case, one can determine the state and intensity of fluvial processes. This paper presents a proposal for the implementation of the hydrodynamic balance to assess their ecological status as one of the first and basic. The assessment of the alluvial rivers hydrodynamic balance is shown on the example of the Skawa river (section above the mouth of Bystrzanka stream). Hydrodynamic balance of the channel was based on the analysis of interdependencies between riverbed bandwidth, the channel lateral and vertical layout and bed stability for the characteristic flows of the water: (Q75%, Q50% Q25%, Q10% and Q1%, bankfull an dominant flows). Bed stability analysis presented in the paper was performed using the computer program ARMOUR. Calculations were performed by comparing the critical Shields stresses characterizing all fractions of bed material to the bed shear stresses of the flowing water. On the basis of analysis of the riverbed in this section it was classified as natural.

Modelowanie transportu rumowiska wleczonego w korytach rzek z dnem aluwialnym na przykładzie górnej i środkowej Odry

Parzonka W., Bartnik W., Kasperek R.

Przegląd Naukowy Inżynieria i Kształtowanie Środowiska

2002

Vol. 11, No. 2

70--79

The paper presents the results of analysis of the bed load transport conditions in the river Odra. Parameter Ks/Kr has been estimated for upper and middle course of the river Odra. Its values are considerably less than 1.0 and can be even equal 0.3. The bed load transport intensity has been calculated by means of the Meyer-Peter and Müller formula (MPM). Parameter Ks/Kr, of this formula, has a great effect on the calculations of the bed load transport. The authors m dified the MPM formula using the real values o parameter Ks/Kr for Upper and Middle Odra. The bed load transport intensity calculated according to the new MPM-C formula is comparable with them easured transport intensity in the cross-section Ścinawa.