Dry polders

Trockenpolder bei Stolzenhagen The 1,680 hectare Lunow-Stolpe-polder and the 650 hectare Friedrichsthal-polder (5/6) are typical dry polders. They are entirely sealed off from the flood dynamics by dikes. That does not, however, mean that they are completely dry. They are interspersed with still, bayou-like bodies of water, on the banks of which plant and animal life abounds. Furthermore, groundwater will always keep coming up and riverwater will keep seeping through the dikes if the river's water level is high enough, especially in the southern section, where the polders lie lower than the river. Hence water is constantly being pumped through floodgates from the dry polders back into the Oder river and the Hohensaaten-Friedrichsthal-Canal.

Die südlichen TrockenpolderThe Foster- and Development Plan for the polders does not envision them to be re-integrated into the natural flood dynamics. However, the Lunow-Stolpe-Polders are to be gradually converted into grasslands, so that at least during a major flood they can be submerged. To submerge cultivated land would be problematic because of erosion and because the water would get contaminated with chemical fertilizers and pesticides. This strategy would provide more retention basins for extreme floods; meaning that its primary function is disaster prevention rather than conservation. But dry polders are significant for conservation purposes as well, in that they provide retreats for synanthropic plants and animals, that is those which have adapted to extensive agricultural use of the land by humans. Such retreats are needed because the National Park concept intends to phase out agricultural use of 50% of the land, making those areas unsuitable for some synanthropic species.