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Upper Biesland Polder

Upper Biesland Polder. Regional urbanization and city fringe outdoor recreation Polder system and (surface) water control Organic dairy farming Wildlife in an agricultural setting: (re)create habitats Further steps . 1. Regional urbanization. 1830-1957.

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Upper Biesland Polder

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  1. Upper Biesland Polder • Regional urbanization and city fringe outdoor recreation • Polder system and (surface) water control • Organic dairy farming • Wildlife in an agricultural setting: (re)create habitats • Further steps ...

  2. 1. Regional urbanization 1830-1957

  3. (Sub) urbanization in the nineties and presently

  4. What might this represent?

  5. “Attempt” to compare between European three city areas ...

  6. A more truthful picture

  7. Westland: greenhouse district

  8. Greenbelt left in the region on the eastern side of Delft Upper Biesland polder Lower Biesland polder

  9. City fringe park “De Delftse Hout” (started 1968) UpperBiesland polder: in 1997 not yet “defined”

  10. 2. Polder system • Geological structure • Polders and polders • Rainfall patterns and water management • Ground water use and drop of ground levels (and if you like the Dutch myth)

  11. Geological structure

  12. Two kinds of polders Why would the left one be deeper than the other? ? ? ?

  13. Average monthly rainfall surplus

  14. Ground level drop • Oxidation of peat: especially N-gas and NO-gasses (up to 10 mm/y drop) • Continental plate movement (< 1 mm/y) • Groundwater extraction (~ 1 mm/y) • Other mining (oil)

  15. Ground water extraction: ground level drop (appr. 1 mm/y)

  16. 3. Organic dairy farming • Breeding less vulnerable cattle • Low input low output approach • Opportunities for wildlife, outdoor recreation and (spatially restricted) closing of production and consumption cycle

  17. Input ... • Non-organic fertilizers, only from within • Smart utilization of natural resources (i.e. oxidation of peat, compost) • No preventive drugs for cattle • No fomula-1 race for output per animal

  18. Output ... • Higher yield (in €) per liter milk and kg meat • Landscape and wildlife “services” (green services) • Educational services • Water management services): purification, storage of excess water, dynamic water levels • …

  19. Diversification on grasslands Water meadows Aquatic nature in ditches and on banks Marshes Woodlands, fencing by piles of branches, woodland fringes Pond (hydrologically isolated from other surface water) 4. Habitat and wildlife enhancement

  20. Plan pond woodlands public footpath purification marsh Lower Biesland Polder water meadow

  21. Biodiversity on grasslands • campion • lousewort • cynosurus • hordeum sec.

  22. Nesting birds K = lapwing Gr = black-tailed godwit TU = redshank SE = oyster catcher

  23. Common wintering birds wigeon teal

  24. Water meadow

  25. redshank black-tailed godwit lapwing stork

  26. Marshes

  27. Ditches and banks

  28. Purification marsh (before planting reed and sedges)

  29. Woodlands,two colony breeders heron cormorant

  30. Pond for (especially) amphibians Frogs, toads, newts

  31. 5. Next steps ...The lower Biesland polder National pilot project for sustainable dairy farming Presentation file downloadable from http://mail.vssd.nl/hlf/UpperBieslandpolder2.ppt

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