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Early Holocene alluvia in the lower Wisłok River valley and their chronostratigraphy in the light of radiocarbon datings and palynological analysis

Superson S., Gębica P., Michczyński A., Kołaczek P., Szczepanek K.

Geochronometria

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2017

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Vol. 44, no. 1

216--225

EN

The paper presents the results of the latest radiocarbon dating and the palynological analyses of organic sediments found in the alluvia of the Wisłok River valley between the towns of Łańcut and Przeworsk. The study conducted in the gravel pit made possible the dating of several alluvial fills of the 7–8 m high Holocene terrace and the 5–6 m high floodplain. The oldest channel alluvia and palaeochannel sediments of the 7–8 m high terrace were dated at 10 100–9300 BP (11 960–10 500 cal BP). According to the anthracological analysis the top cover of clay overbank alluvia, which bears charcoal fragments, was deposited in the Subboreal and/or the Subatlantic Phases. In the sequence of the 5–6 m high floodplain, the bottom fills of palaeochannels, dated at 10 195–9885 cal BP (probability level: 68.2%; GdS-3233: 8900 ± 95 BP ) and 11 095–10 755 cal BP (probability level: 68.2%; GdS-3228: 9575 ± 95 BP), were truncated by erosion and covered by alluvia of palaeomeanders, which were active in the 19th century. Preservation of the erosional bench of the Early Holocene organic sediments indicates the predomination of lateral migration of the river channel during the last 200 years and the formation of wide erosional floodplain that has been aggraded with recent flood alluvia. In the 20th century the floodplain aggradation was simultaneous with the deepening of the Wisłok riverbed.

2

Osady rzeczne i roślinność interpleniglacjału zlodowacenia Wisły w dolinie Wisłoka między Rzeszowem a Lańcutem

Szczepanek K., Kalinowicz N., Gębica P.

Przegląd Geologiczny

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2007

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Vol. 55, nr 7

595-600

EN

The paper presents the results of geomorphological studies and pollen analysis performed for alluvial deposits at 2 sites situated in the Wisłok River valley. The deposits consist of thin layers of organic muds filling palaeochannels or thermo-karst lakes of the Wisłok River, dated at the Interpleniglacial (Grudziądz Interstadial) of the Vistulian Glaciation. These deposits build the lower part of a sand terrace, 8-12 m high, and outliers of this terrace buried by overbank alluvial sediments within a floodplain. The samples for pollen analysis were taken from a natural undercut in the Wisłok River channel and from a sand pit dug to a greater depth. The pollen diagrams prove the existence of trees (forest-steppe) including primarily Pinus sylvestris, Betula t. alba, Pinus cembra and Larix. The diagrams do not show a clear tendency of a plant succession and thus of any distinct climate changes. The sedimentation took place under cool, boreal climate conditions. The occurrence of several layers of organic and sand deposits in the sections does not reflect rhythmic warm/cold climatic oscillations documented in the Interpleniglacial alluvial sequences in Western European rivers, but is a result of vertical channel fluctuations and facies changes.

3

Modernizacja układu doprowadzenia powietrza pierwotnego do kotłów OP 650k

Szczepanek K.

Energetyka

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2007

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nr 8

577-580

PL

Podstawowym celem modernizacji układu doprowadzenia powietrza pierwotnego do kotła było zmniejszenie zużycia energii elektrycznej na potrzeby własne bloku energetycznego, przy jednoczesnym zapewnieniu właściwych parametrów eksploatacyjnych kotła oraz ochrona środowiska naturalnego. Polega ona na ograniczeniu emisji szkodliwych substancji oraz emisji hałasu. Modernizację układu doprowadzenia powietrza pierwotnego do kotła przeprowadzono w elektrowni na podstawie nowatorskiego projektu, polegającego na optymalizacji pracy wentylatorów zabudowanych na gorącym powietrzu, tj. wentylatorów młynowych, tak by maksymalnie ograniczyć zużycie energii do ich napędów elektrycznych. Modernizacja przyniosła ok. 1 MW oszczędności po stronie potrzeb własnych bloku energetycznego elektrowni.

EN

The main aim of the boiler primary air supply system modernization was reduction of auxiliaries energy consumption, ensuring at the same time proper operation parameters of the boiler and environment protection which in this case consists in reduction of noise and of environmental pollutant emission. The primary air supply system was modernized on a base of innovative design concerning optimization of hot-air fans (mill fans) operation with the aim to maximum reduce their electric drives energy consumption. Thanks to this power unit modernization about 1 MW of auxiliaries energy consumption was saved.

4

Modernizacja układu doprowadzenia powietrza pierwotnego do kotłów OP 650K w PKE S.A Elektrownia Łaziska

Szczepanek K.

Polityka Energetyczna

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2004

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T. 7, spec.

365-374

PL

W artykule przedstawiono możliwości modernizacji układów doprowadzenia powietrza pierwotnego do kotłów w aspekcie zmniejszenia zużycia energii elektrycznej na potrzeby własne bloków energetycznych przy jednoczesnym zapewnieniu właściwych parametrów eksploatacyjnych kotła. Przedstawiono również efekty dotyczące ochrony środowiska na tle efektów modernizacji. Na przykładzie PKE S.A. Elektrownia Łaziska udowodniono możliwości zastosowanie nowatorskiego projektu i wykazano jego efekty energetyczne. Praca przedstawia możliwości zastosowania modernizacji na innych jednostkach wytwórczych energetycznych. Istotę konieczności wdrożenia projektu oparto na głębokich przemianach gospodarczych zachodzących w sektorze energetycznym dążących do sukcesywnego zmniejszenia kosztów produkcji energii elektrycznej.

EN

This paper presents various possibilities of modernizing the systems of primary air input to power boilers in the aspect of the decrease use of energy for the own needs of power units and at the same time ensuring the proper exploitation parameters of the boiler. It presents the effects concerning the environment protection against the background of effects of modernization. The example of Łaziska power station PKE S.A. proves the possibilities of using the innovatory project and shows the energetic effects. It also presents the possibilities of applying the modernization in other power generating entities. The necessity of introducing this project has been based on the idea of deep economic changes that take part in the energy sector, successively tending to reduce the expenses of energy production.

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Chronostratigraphy of late pleistocene fluvial deposits in the Wisłok river valley between Rzeszów and Łańcut, south Poland

Gębica P., Bluszcz A., Pazdur A., Szczepanek K.

Geochronometria

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2002

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Vol. 21

119-128

EN

This paper presents results of absolute dating of alluvial sedimentary series forming a rendzina terrace (higher floodplain) 7-8 m high above the Wisłok River channel and a sandy terrace 8-10 m high in the Subcarpathian Pradolina section of the Wisłok River valley. The organic mud infilling fossil depressions (palaeochannels?) in the lower part of the rendzina terrace have been dated by the radiocarbon method to more than 38,500 BP. The organic series occurring within the sandy terrace yielded three ages >36,000 BP. Results of palynological analyses carried out on both sites indicate tundra or forest-tundra environments with water-filled depressions at the time of organic sediments deposition. The top of the 8-10 m high sandy terrace is built of fluvial sands and eolian cover sands with dunes in the upper-most part. Their age has been established by means of the OSL method to 11.2š0.9 ka BP. The younger alluvial inset fill is formed of sands and silts with involutions occurring under Holocene muds. They were deposited by a braided river during the Upper Plenivistulian as indicated by two other OSL dates of 22.2š2.2 ka BP and 14.0š1.5 ka BP. Within the rendzina terrace the youngest series of Vistulian age is built with peats and silts, infilling the wide depression at the foots of sandy hillocks, dated to about 11,800 BP.