Environmental Engineering Reference
In-Depth Information
discharge from the main stream should be directed to the Old Nida channel. For
better watering of the valley, the surrounding streams should also be used to supply
the old channel system and the wetlands in the valley (Bartnik et al.
2004a
,
b
,
c
).
At present, some species have disappeared from this region. Fortunately, the
purpose of the intensi
cation of agriculture production has been changed and the
restoration of the old water system can be done. Another good example is the
reservoir in Pi
ń
cz
ó
w in which 5 species of molluscs live, including two which have
been listed in the
“
red topic of extinct species
”
. The fauna and
fl
flora is not limited to
molluscs in the Pi
czowski Reservoir. In the widened valley, 262 kinds of plants,
51 mollusc, 11 amphibians, 3 reptiles, 160 birds and 16 mammals have been
recognised (Bartnik et al.
2004a
). Within the presented reach of the Nida River and
the valley, the following protected areas had been established:
ń
National Landscape Parks (Zesp
ółŚ
wi
ę
tokrzyskich i Nadnidzia
ń
skich Park
ó
w
Krajobrazowych
—
National Landscape Park of the Valley of the Nida River),
Nature 2,000 bird directive (Dolina Nidy
—
PLB260001),
Nature 2,000 habitat directive (Ostoja Nidzia
ń
ska PLH260003).
The Por
ę
bianka River
The Por
ę
bianka River is located in the southern part of Poland in the Gorce
Mountains. It is a left tributary of the Mszanka River. Its source lies in the Obidowa
Hill (1,000 m a.s.l.). Por
ę
bianka is a regulated river. In its upper run the valley is
quite narrow and the river structures in the channel are distributed regularly. Bed
material has been settled there but below this reach the lack of bedload has been
encounted. Within the middle reach in village of Nied
ź
wied
ź
, from the bridge down
Fig. 5.8 Bedrock channel of the Por
ę
bianka River in the region of a local hydropower plant
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