Temat: Powodzie
Paweł G.:
Zdarzają się nam dość często.
Jak to właściwie jest, może ktoś wie, czy utworzenie zbiorników retencyjnych jest:
a) niewykonalne
b) bardzo trudne
c) bardzo drogie
d) oprotestowane przez ekologów
e) nikomu się nie chce
f) ?
g) ?
IMHO e) zreszta to nomen omen temat rzeka ;)
Cytuje za Pond Manifesto (broszurce European Pond Conservation Network):
"In all cases, a key asset of small waterbodies is that they are easy and cheap to create. They provide a practical small-scale solution that works at a local scale, but can also build together to give a network providing significant national benefits[...] Strategically located pond networks have the potential to hold water back at source, recharge aquifers and reduce the volumes of water generated before they become a problem. Modelling studies in the UK have shown that by installing 10,000 m3 of storage per kilometre square (roughly equivalent to ten mediumsized ponds) it is possible to capture all of a typical heavy rainfall event from that 1 km2, significantly reducing water loss. Small ponds ranging in size from only 3 m2 have been shown to intercept all the flow from a 25 hectare field drainage network, with no outflow. These systems effectively mimic what can be seen in natural systems, where wooded headwater valleys do not flow, but are a series of terraced
temporary ponds...[EDIT] Artificial floodplain ponds are now integral parts of flood relief strategies, such as in the tributary floodplains of the River Meuse catchment. These are often integrated as parts of river rehabilitation projects (e.g. the lower Rhine)."
Czyli ze male zbiorniki wodne ktore sa tanie "w budowie" jesli je z glowa rozmiescic moglby przyjac nadprogramowy opad. Nie wspominajac juz o korzysciach z biodiversity w takich zbiornikach...
Michał C. edytował(a) ten post dnia 17.05.10 o godzinie 21:24
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