Preferencje help
Polish version English version Język
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 5

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych:  Bobr River
help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
1

Cuesta landscape in the middle part of the Sudetes Mts

100%
Tulaczyk S.
Geographia Polonica
|
1992
|
tom 60
2
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Physical properties of the soil formed as a result of recultivation of sand-pits in the Bobr River valley

100%
Greinert H., Drab M.
Acta Agrophysica
|
2000
|
tom 35
Quite large areas of the alluvial soils in the valley of the river Bobr were destructed by the sand and gravel exploitation. After the recultivation measures, which consisted of backfilling of the open-castwith waste aggregate, levelling the surface and putting on such prepared surface 50-200 cm of the stripping material,the yield was very low.The field and laboratory experiments have shown that during the technical operations the soil was compacted to such degree, that the root growth and water permeability was restricted to large extent.The soil compaction was noted in the whole soil profile.The evidences of this process were the high bulk density( often over 1,8 Mg m-3), very low water permeability values and low air capacity. The situation during the 12 years from the finishing of the recultivation has not changed.
3
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

The silting influence on the capacity of the Krzywaniec reservoir

80%
Mokwa M., Malczewska B.
Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation
|
2008
|
tom 39
The Krzywaniec reservoir is a part of Dychów complex hydraulic engineering, and it was created as a damming up water of the Bóbr river in 42+700 km to wave elevation 73.30 NN. The river valley was divided by three span gate weir and tide gate to derivation channel to ESP Dychów. The Krzywaniec reservoir is currently silted up so that the probable water surface Q1% is going to reach reservoir site embankment which means it poses the flood risk on surrounding area. The authors present restoring the initial situation on Krzywaniec reservoir, and estimated the reduction of flood depending on method of declogging the reservoir using computer simulation performed in HEC-RAS.
4
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

The pH changes of the soils formed as a result of reclamation of the sand-pits

80%
Drab M., Greinert H.
Acta Agrophysica
|
2001
|
tom 51
The alluvial soils in the Bóbr river valley, devastated by sand and gravel exploitation, were reclaimed for agricultural use. After reclamation treatment, the newly formed soil was very acid. Application of 5 Mg/ha lime elevated soil pH to 6-7, but during the following years, soil pH dropped again by about one half of the pH unit a year. Rapid drop in the pH level can result both from geological and soil-forming processes. Efficiency of mineral fertilizers applied in various combinations did not give the expected results and the yield of cultivated plants was not satisfactory. Mineral fertilization in various combinations did not result in the expected yield levels.
5

Rozmieszczenie i stan zachowania siedlisk przyrodniczych projektowanego obszaru Natura 2000 "Ostoja nad Bobrem"

41%
Reczynska K.
Acta Botanica Silesiaca
|
2008
|
tom 03
The paper summarizes fieldwork which was carried out on the proposed Natura 2000 area called Ostoja nad Bobrem, located in the south-west of Poland. The research confirmed the presence of natural habitats appearing in Annex I to the Habitat Directive. Among them there are particularly important priority habitats such as: species-rich Nardus grasslands on siliceous substrates in mountain areas (and submountain areas in Continental Europe *6230), Tilio-Acerion forests on slopes screes and ravines (*9180) and alluvial forests with Alnus glutinosa and Fraxinus excelsior (Alno-Padion, Alnion incanae, Salicion albae *91E0).
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.