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1

Indicators of Variability of Water Flow Rate in the Piwonia River

100%

Grzywna A.

Journal of Ecological Engineering

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2019

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tom Vol. 20, nr 7

205--210

EN

The paper presents the variability of the Piwonia River flows in the Parczew profile (catchment area of 391 km2) in hydrological years 2009/10–2015/16. On the basis of the monthly flow and daily water level measurements, flow-level curves and hydrograms of water flows were drawn. The analysis of the weather conditions in the catchment area showed that in the analyzed period there were two very wet years (2010, 2014), three wet years (2011, 2013, 2016), one normal year (2012) and one dry year (2015). The total of annual precipitation in very wet years was 150 mm (130% of the norm) higher than the average for multi-years, and in the dry year it was 60 mm (86% of the norm) lower. The intensity of instantaneous flows ranged from 0.26 m3∙s-1 in 2015 to 5.5 m3∙s-1 in 2010. The average annual flow of the river in multi-years was SSQ = 1.68 m3∙s-1 and ranged from 1.19 m3∙s-1 in 2015 (dry in terms of precipitation) to 2.13 m3∙s-1 in 2010 (very wet). The direct reasons for the variability of river flows are: weather conditions, retention capacity of lakes and fish ponds, and exploitation of the hydrotechnical structures. The hydrological year 2014/15 was characterized by the highest variability of flows, while the lowest variability was recorded in the hydrological year 2010/11.

2

The vascular flora of a section of the transformed Piwonia River channel – the surrounding ditch on Lake Bikcze (Leczna-Wlodawa Lakeland) – in relation to habitat conditions

63%

Pogorzelec M. , Serafin A.

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tom 63

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nr 1

EN

In the period 2007-2009, floristic, habitat and physico- chemical analysis was made of the hydraulically improved surrounding ditch of Lake Bikcze in the Łęczna-Włodawa Lakeland. Hemicryptophytes, with a large proportion of geophytes as well as hydrophytes and helophytes, were the main component of the flora of the studied section of the transformed Piwonia River channel. In terms of historical-geographical classification, spontaneophytes were predominant, and apophytes among them, whereas anthropophytes were poorly represented, which was confirmed by the correspondingly high values of the synanthropization and apophytization indices (> 50%) as well as the low value of the anthropophytization index (approx. 2%). In the aspect of the range of occurrence, Euro-Siberian and cosmopolitan species were predominant, which are classified in terms of the indicator values as hygrophilous plants, neutral to continentality, living in moderately cool or moderately warm climatic conditions, characterized by a wide range of tolerance to the trophic state index and to soil acidity. An analysis of the values of the basic physico-chemical factors of the stagnant water in the surrounding ditch showed variations in the value of pH, electrolytic conductivity and the value of the concentration of organic and ammonium nitrogen as well as of organic phosphorus and phosphates. In spite of the anthropogenic nature of the studied watercourse, the qualitative and quantitative proportions of the flora species indicated the natural state of the flora based on the native vegetation, characteristic of the study area.

3

Przekształcenia sieci hydrograficznej zlewni stawów sosnowickich

51%

Grzywna A.

Acta Scientiarum Polonorum. Formatio Circumiectus

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2013

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tom 12

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nr 4

PL

W pracy przedstawiono przeobrażenia sieci hydrograficznej środkowego odcinka rzeki Piwonii obejmującego swym zasięgiem mikrozlewnie stawów sosnowickich. Podstawa analizy były archiwalne mapy topograficzne z XIX i XX wieku. Pierwsze prace hydrotechniczne wykonane w latach międzywojennych obejmowały wybudowanie stawów rybnych oraz systemu kanałów doprowadzających do nich wodę. W wyniku wykonanych wówczas prac we wsi Sosnowica powstało 25 stawów, obecnie funkcjonuje 11. Duże zmiany w gospodarce stawowej w rejonie Sosnowicy nastąpiły w związku z wybudowaniem kanału Wieprz–Krzna (KWK) kiedy to w latach 60. zmodernizowano prawie wszystkie stawy. Zmieniono źródło poboru wody i system gospodarki wodą z paciorkowego na zasilanie stawów z doprowadzalników. W 1963 roku w wyniku wykonania projektu odwodnienia powstał obiekt melioracyjny Piwonia-Uhnin. Zinwentaryzowana długość sieci wodnej w 2011 roku wynosiła: rzeka Piwonia – 3 km, KWK – 3 km, rowy melioracyjne – 13 km, rowy stawowe – 7 km. Łączna długość sieci hydrograficznej wyniosła 26 km w zlewni stawów sosnowickich o powierzchni 28,7 km2, co odpowiada gęstości prawie 1 km · km–2.

EN

This paper presents the transformation of the hydrographic network of the middle section of the river Peony covering at microcatchment joint sosnowickich. The analysis was based archival topographic maps of the nineteenth and twentieth centuries. The first civil works executed during the interwar period included the construction of fish ponds and a system of ducts to water them. As a result of the work carried out in the village Sosnowica established 25 pond, currently function 11. Major changes in the economy in the area of joint Sosnowica occurred in connection with the construction of Wieprz–Krzna Canal, where in the 60’s upgraded almost all the ponds. Changed the source of water supply and water management system of the system of independent bead canal. In 1963, as a result of dehydration of the project was building drainage Piwonia-Uhnin. Inventoried length of the water in 2011 was: River Piwonia – 2.9 km, KWK – 3.0 km, furrows – 11 km, ditches joint –30 km. The total length of the hydrographic network was 45 km in the catchment area of the ponds sosnowickie 28.7 km2 which corresponds to a density of 1 km · km–2.