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1

Non-homogeneity of hydrometric data and estimating the rating curve

Jakubczyk Teresa, Szulczewski Wiesław

Meteorology Hydrology and Water Management. Research and Operational Applications

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2023

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Vol. 11, Iss. 1

107--122

EN

One of the main tasks of contemporary hydrology is to plot the best possible rating curve, which has numerous applications in practical hydrological problems. The quality of the curve depends to a significant degree on the precision of hydrometric measurements and the precision in determining the relationship between discharge and the stage (water level). In this study, we engage the multidimensional problem of non-homogeneity of hydrometric data. The distances between a given point of measurement and the given cross-section proved to be highly diverse. Hence, we propose data transformation so that every measurement can be treated as taken in a given cross-section. The transformation allows partial homogenization of measurement data. An automatic non-linear method for estimating the rating curve is also proposed. The method has been tested on selected representatives of mountain, submontane, and lowland rivers of the Oder River catchment basin (Lower Silesia, Poland). Cross-sections selected for analysis were: Łąki on the Barycz River, Lądek Zdrój on the Biała Łądecka River, Jelenia Góra on the Bóbr River, Jakuszyce on the Kamienna River, and Łozy on the Kwisa River.

2

Wykorzystanie danych hydrometrycznych pochodzących z monitoringu pracy małej elektrowni wodnej

Zawadzki Paweł, Walczak Natalia, Nieć Jakub, Zaborowski Stanisław

Przegląd Budowlany

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2022

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R. 93, nr 7-8

136--138

PL

Przy modelowaniu przepływu w rzekach korzystamy z danych pochodzących z obserwacji i pomiarów prowadzonych przez IMGW. Takich obserwacji nie prowadzi się zazwyczaj na mniejszych ciekach, na których w ostatnich latach często budowane są małe elektrownie wodne. Wyposażenie tych elektrowni pozwala na zdalne kontrolowanie ich pracy, jak również na pomiary stanu i przepływu wody. W pracy porównane zostaną historyczne dane hydrologiczne z wodowskazu Kowanówko na rzece Wełna z danymi hydrometrycznymi pozyskanymi z monitoringu pracy elektrowni wodnej w Obornikach Wielkopolskich.

EN

In modeling the flow in rivers, we use data from observations and measurements conducted by the Institute of Meteorology and Water Management. Such observations are not usually carried out on smaller watercourses, but there are often small hydropower plants located there. The equipment of these power plants allows for remote control of their operation, as well as for water level and discharge measurements. The study will compare the historical hydrological data from the Kowanówko water gauge on the Wełna river with the hydrometric data obtained from the monitoring of the operation of the hydroelectric power plant in Oborniki Wielkopolskie.

3

Flood flows in the Odra River in 2010 – quantitative and qualitative assessment of ADCP data

Banasiak R., Krzyżanowski M.

Meteorology Hydrology and Water Management. Research and Operational Applications

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2015

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Vol. 3, Iss. 1

11--20

EN

During the 2010 flood in the Odra basin a measuring campaign was executed that produced a set of data on peak discharges. Flow measurements located near gauging stations were taken from a boat with an Acoustic Doppler Current Profiler (ADCP) equipped with a GPS. The paper presents a detailed analysis of the records, including referencing to ortophotomaps, to assess the quality of ADCP recording, local flow characteristics and finally to re-evaluate the total discharge values. Further, the flow is divided between the main channel and the floodplains, while the main channel in the case of the presence of groynes is additionally divided into a central zone between the groynes and zones of groynes. Partitioning of particular zones to the total discharge is calculated along with average and maximum local flow velocities. The study delivers data for the development of more reliable numerical modelling tools, which in turn may fulfil the measuring gaps in situ. It is shown that the modern field data acquisition GIS post processing, and numerical modelling support each other and improve the final overall result, bringing hydrologic products to a higher standard. The synergy of hydraulics and geoinformatics in hydrology is therefore highly recommendable.