Wyniki wyszukiwania - Biblioteka Nauki

1

Fish Pass Functionality in Relation to the Dynamics of Hydrological Conditions in the Upper Course of the River Iskar (Case Study)

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Petkova S. , Kanev E. , Dimitrova I. , Kisliakov D. , Uzunova E.

Journal of Ecological Engineering

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2019

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tom Vol. 20, nr 6

66--72

EN

The investigated fish pass is a part of а low-head hydrostatic pressure machine (HPM) located on an existing weir in the upper Iskar River. Monitoring of the hydraulic features of the fish pass was performed under different hydraulic conditions. Diversity and abundance of the local fish fauna was investigated with the aim to verify target fish species. A major limiting factor for using of the fish pass during flood periods was high water velocity (both inside the fish pass and at the fish pass downstream entrance), while during the low water discharge periods it was the insufficient water depth in some pools and the significant differences between the water levels in adjacent pools. The difference between the water levels at the entrance and exit of the fish pass reduces the chances for access of small-sized fish species. Some measures for improving fish pass functionality were developed. Several re-construction solutions were proposed in an attempt to help solving the identified problems.

2

The Possibilities of Using Hec-Ras Software For Modelling Hydraulic Conditions of Water Flow in the Fish Pass Exampled by the Pomiłowo Barrage on The Wieprza River

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Hammerling M. , Walczak N. , Walczak Z. , Zawadzki P.

Journal of Ecological Engineering

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2016

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tom Vol. 17, nr 2

81--89

EN

The aim of the article is to analyse hydraulic conditions of water flow in a fish pass. The test facility is part of the Pomiłowo barrage in the commune of Sławno, Poland. The authors applied HEC-RAS software for modelling hydraulic parameters of the water flow in the fish pass. The data from field measurements was implemented in the software and calculations of changes in the water table in the fish pass were made. The results confirmed the usefulness of HEC-RAS software for estimating hydraulic parameters of water flow in a fish pass. HEC-RAS software enables to take into account the parameters responsible for the phenomena accompanying the flow through a fish pass. Selecting mathematical model parameters (coefficients) should be preceded by a multidimensional analysis of the facility. More precise information on hydraulics, hydrology and biology of the test fish pass are also required.

3

Application of numerical methods in the design and analysis of fish pass efficiency

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Puzdrowska M.

Czasopismo Techniczne. Środowisko

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2013

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tom R. 110, z. 1-Ś

99--109

EN

The paper summarizes the examples of numerical computational methods to analyze the efficiency of fish passes. Numerical simulations were performed using the commercial software Flow 3D. The examples refer to the 2 types of construction of the device: Vertical Slot Fishways and Bolt Fishways.

PL

W niniejszym artykule przedstawiono przykład zastosowania metody numerycznej do analizy sprawności przepławek dla ryb. Obliczenia wykonano programem Flow 3D. Przykład odnosi się do 2 typów konstrukcji urządzenia: przepławki szczelinowej i ryglowej.

4

The passage of fish through the fish pass in the Czchow reservoir dam in autumn

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Luszczek-Trojnar E. , Epler P. , Kopek T. , Szczerbik P. , Socha M. , Drag-Kozak E.

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nr 1-2

5

Modernizacja stopnia wodnego Skórka na rzece Głomia

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Zawadzki P. , Hämmerling M. , Walczak N. , Wierzbicki M.

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tom Nr 44

235--240

PL

W 2012 roku zakończona została budowa jazu, mostu i przepławki dla ryb na rzece Głomi w miejscowości Skórka. Nowy jaz umożliwił dalszą eksploatację elektrowni wodnej o mocy 12 kW, a wybudowanie przepławki dla ryb ułatwiło ich migrację. Analiza przepływów wody przez stopień wody wskazuje na konieczność modernizacji elektrowni wodnej. Problemem na stopniu jest również zapewnienie odpowiedniego prądu wabiącego w celu wskazania odpowiedniej drogi dla migrujących ryb. Na podstawie analizy rozwiązań technicznych zaproponowano m.in. wybudowanie drugiej przepławki. W artykule przedstawiono szczegółowo analizę modernizacji stopnia wodnego Skórka z uwzględnieniem wszystkich elementów wchodzących w skład górnego i dolnego stanowiska budowli piętrzącej. Przebudowa obiektów hydrotechnicznych, których stan techniczny wymaga modernizacji powinna uwzględniać charakterystykę pracy wszystkich elementów stopnia aby uniknąć potrzeby poprawy działania elementów już zmodernizowanych. W pracach naprawczych należy przewidzieć różne scenariusze jakie mogą wystąpić w okresie eksploatacji stopnia.

EN

In 2012 the construction of a weir, a bridge and a fish pass on the river Głomia in the Skórka village was com- pleted. The new weir allowed to continue operating hydroelectric power station (12 kW). The construction of fish ladders allowed the migration. The analysis of water flows by the barrage indicates the need for modernization of hydroelectric power. The problem on the barrage is also to provide sufficient current attractant in order to identify a suitable way for migratory fish. The analysis of the technical solutions proposed the construction of a second fish pass. The paper presents a detail analysis of the modernization of the barrage yet, taking into account all the elements constituting the upper and lower positions of the structure. Reconstruction of hydrotechnical objects, technical condition of which requires modernization should take into account the performance characteristics of all elements of the barrage to avoid the need to improve the operation of the elements already modernized. The repair work should be different scenarios that may occur during the lifetime of barrage.

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Problematyka przywrócenia migracji ryb przez obiekty hydrotechniczne w korytach rzecznych

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Wierzbicki M.

Landform Analysis

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2013

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tom Vol. 24

107--113

PL

W artykule poruszono problematykę przywrócenia migracji ryb przez obiekty hydrotechniczne w aspekcie oddziaływania piętrzenia na morfologię koryta. Omówiono zmiany jakie mogą nastąpić w korycie rzeki na skutek piętrzenia wody i jej wykorzystania dla celów energetycznych, oraz wpływ, jaki piętrzenie wywiera na warunki migracji organizmów wodnych, głównie ryb. Przedstawiono priorytety oraz założenia projektowe, które powinny spełniać współczesne konstrukcje przepławek tak, aby ich działanie było jak najbardziej efektywne. Na podstawie prac związanych z opiniowaniem dokumentacji projektowych oraz wniosków o dofinansowanie budowy przepławek ustalono, jakie elementy powinny być brane pod uwagę podczas opracowywania koncepcji, projektu oraz użytkowania przyjętego rozwiązania udrożnienia stopnia dla migracji organizmów. Wskazano na potrzebę rzetelnej analizy uwarunkowań formalnoprawnych, środowiskowych i technicznych oraz różnych wariantów rozwiązań.

EN

In this paper aspects of the fish migration trough barrages in context of the barrage influence on river morphology are presented. River morphology changes as the result of the artificial water level increasing and water usage for the power plant are described. Also the barrage influence on fish migration conditions is presented. Fishpass projects priorities and foundations that should be fulfilled to get maximum efficiency are discussed in this paper. On the basis of applications for providing finances of fishpass projects and their realizations, aspects that should be taken into consideration during the conception, project elaborating and the fishpass utilization are specified. The necessity of law regulations and environment and technical aspects adequate analyse is emphasized. Also different versions of available solutions should be analysed.

7

Experimental Studies on the Spatial Structure and Distribution of Flow Velocities in Bolt Fishways

63%

Puzdrowska M. , Heese T.

Journal of Ecological Engineering

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2019

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tom Vol. 20, nr 11

82--99

EN

One of more important elements affecting the efficiency of fish passes is a 3D spatial structure of the flow and the flow velocity. The paper presents an analysis pertaining to the deformations of these elements caused by the modification of the fishway’s partition geometry. It has a crucial meaning for the ability of fish to migrate through the fish pass. The research has a key practical significance as it proves the way the apparent modification of the partition geometry affects the hydraulic conditions within the entire the channel of the fishway. It may have very serious consequences for the design assumptions. The presented results of the experimental research were obtained as a consequence of the site and laboratory tests carried outusing a physical model. The measurements were performedfor 3 components of flow’s instantaneous speed within the indicated measurement sections. The results were developed using Matlab software. It was established that the number of whirls produced in the fishway’s pool depends on the quantity of spillway slots and – what seems to have the greatest impact on the flow structure – on the location of slots. The size of whirls is determined by the geometry of spillway slots. The presence of additional spillway slots in the pool, except for the huge main migration slot, contributes to the generation of more whirl structures within the recirculation zone. The more whirls produced in each of the whirl zones, the smaller their diameter. Thisshould create more favourable conditions for the fish migration.

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Application of close-range remote sensing for automatic identification of ice jams in rivers in the area of the inlet to the fishway

63%

Błotnicki J. , Gruszczyński M. , Jarzembowski P. , Popczyk M.

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tom nr 75 (147)

97--106

EN

Ice phenomena in watercourses and channels pose a threat to flow continuity and hydrotechnical devices. The organoleptic method, relying on human observation, has limitations such as a narrow range, subjective assessment, and high effort, leading to its decline in use. This article presents a number of modern techniques, i.e., the interpretation of RGB images, using unmanned aerial vehicles. Drone imagery offers a bird’s-eye view of areas that would otherwise be difficult to survey. It can improve the detection of frazil ice jams and, thus, contribute to the monitoring and spread of frazil ice. The authors performed research in the area of the Wrocław Water Junction on the Odra River in the area of the inlet near the fish pass at the Opatowice Weir during the flow of frazil ice on the water surface. To observe the phenomenon, a UAV with an RGB camera was used to record video in an orthogonal perspective in order to reduce geometric distortions of the optical system. The center of the frame was used for the analysis. The presented research results and the recognition of the literature indicate the possibility of using the presented technique for early detection of a potential threat from emerging ice phenomena. The results of the conducted analyses are objectively compared to the observational technique used at observation stations and allow for a reliable comparison of the intensity of ice phenomena in selected periods.