Korytarz ekologiczny doliny Odry pdf

Summary
barges and, related to this, a construction plan to build several dams on the stretch where
there are no such constructions (between Brzeg Dolny and the river mouth). Construction of
those dams would lead to the destruction of majority of forests and other valuable biotopes
in the area between the levees. The proposed restructuring of the Oder is a very high risk
project economically speaking. Firstly – along the Oder there is a railway line, with a high,
but unused, transport capacity. Secondly – in the situation caused by the growing repercussions
of the global warming effect and the gradually increasing water deficits in some
regions of the country (also in West Poland) the demand for water will grow (for the needs
of people, agriculture, industry). A higher intake of water will lead to a drop in the river’s
water level, which may therefore cease its use as a navigation channel.
Similarly, huge damages to the valley biocenoses will be caused by the planned construction
of the East-West waterway, through the Warta, Noteæ and Bydgoszcz channel and
the Vistula and Bug rivers. This will particularly affect the area of peatbogs and flood-
-meadows as well as populations of waterfowl (especially in the region of the S³oñsk
reserve).
Attempts should also be made to limiting the reinforcement of river banks only to the
most endangered parts of the rivers of the Oder catchment basin (towns, settlements, concave
arcs). It is recommended to use bio-technical reinforcements, rock filling or openwork
slabs.
Protection of the natural environment of the ecological corridor of the Oder river
1. Various steps should be made towards:
• raising of ground water levels in areas where it had dropped, following human activity,
bottom erosion or drought,
• the restoration of biotopes, which have been lacking in individual tracts of the river,
• the creation of artificial small waterbodies in the Oder valley, using, for example, used
gravel pits, and the creation of isles on those reservoirs, which will be particularly
important as new breeding sites for waterfowl,
• reconstruction and construction of small retention reservoirs in the Oder tributaries.
2. If the construction of Malczyce dam is performed, it is proposed to use part of the
dammed waters to irrigate areas in the Oder valley, downstream of the dam, using the network
of ox-bows.
3. In the parts, where the ground water level has dropped significantly, weirs should be
built on the Oder tributaries – around their mouths – and water should be carried by channels
to the Oder valley area.
4. The backfilling of the ox-bows and levelling of flood terraces should be abandoned.
5. The possibility of creating isles, using suitable ox-bows, should be considered.
6. An optimal solution is to maintain as high as possible diversity of ox-bows, such as:
ox-bows joined with the Oder at the upper end, at the lower end, at both ends, ox-bows
cut-off from the river, joined with the river only during high water periods; differentiation
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