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Welcome toEmschergenossenschaft!

� The waterboard’s tasks for river basin management

� Stormwater management – background, chances and restrictions

� Site visit: what are you going to see the next days ?

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Emscher catchment

EMSCHER-GENOSSENSCHAFT

2,4Inhabitants Mio

2.775Inhabitants/ km2

156Members

865Catchment km2

1899Foundation

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Tasks within river basin management

Wastewater disposal• WW discharge

• WW treatment

• Sludge treatment and utilisation

Flood protection

Maintenance and developmentof watercourses

Stormwater management

Groundwatermanagement

Planning and consultation services

Delivery of water for industrial use

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Emscher System: historical development

� 19th century: Detection of large coal deposits, Opening of coal minesIndustrial development, heavy increase of population and sewageProblems with sewage transport due to mining subsidence; deseases

� Decision to use the river Emscherand its tributaries as an open wastewater discharge system

� Wastewater of the whole Emschercatchment area treated at the Emscher mouth treatment plant (leading to the Rhine)

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New waterbodies for a modified region

old profile

wastewater sewer

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Planning targets of Emscher reconstruction

New „Emscher Valley“

• Continuous green habitat along the Emscher,

length 80 km

• Valuable natural enviroment network along

the new clean tributaries

• Creation of green and open spaces

• Design of landscape and the urban spaces

• Improvement of living conditions

• Economic upgrading of the whole Emscher Region

Improvement of runoff-regime is necessary:

Sustainable urban drainage systems

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How to create SUDS

• Federal water law: stormwater management at site is obligatory for new settlements/buildings, but:

• More or less no development of new settlements

• Existing drainage systems have a right of continuan ce

• All changes are voluntarily (but not for free)

• Persuading and supporting is necessary

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Future convention for storm waterofficial signing 31.10.2005

• regionwideconsensusfor SUDS!

• AIM: 15% less sewerdischargeuntil 2020

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Persuasive:Fee system for stormwater

• Drainage/sewer system in waterboard catchments consi sts of two parts: municipal sewers and superior system of water board (e.g. storage buildi ngs, wwtp).

• Municipalities pay to the water boards for the main tenance of the superior system.

• For both, inhabitants pay to the municipalities.• Fee is divided belonging to nature of discharge:

- per m³ wastewater (average 2,40 €/m³)- per m² impervious area for stormwater (average 0,90 € /m² * y).

• In regions without water bodies (outside North Rhin e-Westfalia) the whole system is in held and maintained by municipal ities

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Experiences from 20 yearsdisconnection in existing settlements

• “General” promotion (with brochures, newspaper articl es etc.) is only of small impact for projects but helpful for a wareness-rising in Germany – other experiences in the Netherlands!

• Financial support is a helpful but solely crucial f actor

• The barriers of bureaucratic effort should not be u nderestimated

• Information and consulting campaigns must be well-p repared with individual arguments

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Housing companies boundary conditions

• No financial advantages possible: drainage fee is p art of additional rental expenses

• Improvement of (ecological) image: better surroundi ng combined with lower costs for tenants

• Disconnection can be (low-cost) part of a general m odernization process

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Housing companies some examples

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Industry and businessboundary conditions

• Economy is the strongest argument, sometimes supple mented by image

• Design follows functions – or is no criteria (except ion: entrance situation)

• First contact must be well-prepared for the special situation at site

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Industry and businesssome examples

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Public buildingsboundary conditions

• Excellent locations to spread the idea, make the theme popular

• Also often big impervious areas (schoolyards)

• Water theme for lessons in biology and other subjec ts

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Public buildings and schoolssome examples

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Conclusions

• (More) legislative support welcome

• Changes in drainage statues (in accordance with right of continuance)

• Holistic approaches necessary:urban – green – climate – drainage planningto identify common needs and develop multitasking solutions

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Masterplan Emscher-Zukunft official release 2006

• Result of 3 years discussion with all regional stakehold ers, planning partners and decision makers:3 district councils, 17 municipalities, politicians, federal ministryof environment, regional union Ruhrgebiet (regional organisationfor planning of non-municipal spaces and parks, bicycle trackwaysetc.), highway department…

• Agreement to common goals

• No binding character

• Focus on Emscher and space around banks,not on complete river basin

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Masterplan Emscher-Zukunft

• Until 2014: regional additional of (individual) water provisionframework planning for all municipalities

• Implementation of combined planning for- attractive urban quartiers (shrinking region!)- climate adaptation – avoiding urban heat islands- prevention against urban flash flood: local retention, temporary flood storage

• …

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Any questions ?

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Next day‘s tour

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Essen: Segeroth-Park near university

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Gelsenkirchen: Tossehof

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Bochum: Fa. Dewender (food wholesale)

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Dortmund: Phönix-See

Let‘s get a bit more into detail….

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Until 1990s:Phoenix West and Hermannshütte

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Hoesch Kanal under construction (1923)

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View of former Hermannshütte(Lake PHOENIX)

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The future: Lake Phoenix and the redeveloped Emscher

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Site plan

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General targets of development

planning-targets PHOENIX West:• High quality sites for sustainable industrial sectors• Technology park, high standard of service quality for bu sinesses

planning-targets Lake PHOENIX:• High quality housing and leisure facilities• Upgrading Hörde district centre

planning-targets new Emscher• Ecological revaluation of the Emscher River Area• Leisure & recreation

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The future: housing at the northern lakeshore

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Planning:data of urban development Lake PHOENIX

• lake and lakeside terrain 40 ha

• housing 24 ha

• commercial 10 ha

• roads 12 ha

• green areas 11 ha

total 98 ha

• flats/houses approx. 1,300

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Lake PHOENIX: surface = 24 ha

volume = 850,000 m 3

(incl. Stormwater retention250,000 m3, n = 25a)

depth = 2.5 m - 3 m

length/breadth: 1,200 m / 300 m

Emscher valley: area = 12 ha

length/width = 1,600 m / 50 m

Emscher river: depth/width = 1,5 m / 4 m

discharge = 250 l/s (stormwater, n = 25a, 30m 3/s)

Planning data water engineering

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Communication concept Infopoint PHOENIX

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Recklinghausen: Prosper-Hospital

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Herten: Zeche Ewald

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Bottrop: elementary school in Ebel

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Duisburg: Landschaftspark Nord

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Thank you for your attention!

Have a nice trip!

Any questions?