Hydraulic Analysis of Causes of Washout of Gdynia-Orłowo Sea-Shore During the Flood in the Kacza River Estuary

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Abstract

In July 2016 in the Three-city agglomeration a rainfall episode of over a day duration and 150 mm summary rainfall height, occurred. This situation, extreme as for Polish conditions, caused significant freshets in rivers and streams running into Gdansk Bay, the Baltic Sea, and serving as collectors of rainfall waters for the sea-coast towns. In many areas of the Three-city flood phenomena and overflows took place. The flood also occurred in the catchment area of the Kacza river in Gdynia. The passing of flood water rise caused damage of many infrastructure objects located along the river valley. The estuary section of the river suffered most, especially sea-shore belt together with beach around the estuary which were significantly washed out. In this paper an approach was made to answer to the question on direct causes of the situation which occurred at the estuary of the Kacza river. To this end, there was worked out a hydrodynamic model of the considered section of the river, based on the solving of two-dimensional differential motion equations of free-surface liquid, and simulations of water flow propagation along the river’s valley were performed for a few variants of hydraulic engineering infrastructure of river bed. Numerical hydraulic analysis made it possible to determine a role of the hydraulic engineering objects in forming the flood water rise as well as their impact on location and range of washout zones of sea-shore belt.

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  • 1. Brunner G.W.: HEC-RAS River Analysis System Hydraulic Reference Manual. Computer Documentation Report Report No. CPD-69 US Army Corps of Engineers Hydrologic Engineering Center (HEC) 2010

  • 2. Majewski W.: Urban flash flood in Gdansk – 2001 Case study. Meteorology Hydrology and Water Management Research and Operational Applications 4(2) 2016 pp. 41-49.

  • 3. Mikos-Studnicka P. Szydłowski M.: The Influence of Hydrological Data Quality on Estimating The Runoff From City Catchment On The Example Of Strzyża Stream In Gdańsk Ecological Engineering 44 2015 pp. 139-153.

  • 4. Mrokowska M. M. Rowiński P. M. Książek L. Strużyński A. Wyrębek M. Radecki-Pawlik A.: Laboratory studies on bedload transport under unsteady flow conditions Journal of Hydrology and Hydromechanics 66(1) 2018 pp. 23-31. doi: https://doi.org/10.1515/johh-2017-0032

  • 5. Szpakowski W. Szydłowski M. : Probable Rainfall in Gdańsk in View of Climate Change. Acta. Sci. Pol. Form. Cir. 17(3) 2018 pp. 175-183.

  • 6. Szydłowski M. Szpakowski W. Zima P.: Numerical simulation of catastrophic flood: the case study of hypothetical failure of the Bielkowo hydro-power plant reservoir Acta Geophysica 61(5) 2013 pp. 1229

  • 7. Weinerowska-Bords K. Szydłowski M Bielecka K. : Analysis of temporal and spatial variability of precipitation in the Strzyza catchment in Gdańsk Inżynieria Morska i Geotechnika 6. 2012

  • 8. Weinerowska-Bords K. : Development of Local IDF-formula Using Controlled Random Search Method for Global Optimization. Acta Geophysica 63(1) 2014 pp. 232-274.

  • 9. Widerski T. Szydłowski M. Szpakowski W. : Measurement and analysis of a flood wave propagation on the Kacza River in Gdynia in Northern Poland. 17th International Multidisciplinary Scientific GeoConference SGEM2017 Water Resources. Forest Marine and Ocean Ecosystems 2017 pp. 453-460.

  • 10. Zima P. : Modeling of the Two-Dimensional Flow Caused by Sea Conditions and Wind Stresses on the Example of Dead Vistula. Polish Maritime Research Vol. 25 iss. s1(97) 2018 pp. 166-171.

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