case case stu study dy Vr Vru, , Estonia Jekaterina Balicka, - - PowerPoint PPT Presentation

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case case stu study dy Vr Vru, , Estonia Jekaterina Balicka, - - PowerPoint PPT Presentation

Nov 24, 2023 550 likes •797 views

(D)rain for Life project conference, Prnu 29.11.2013 SUDS in existing urban context: case case stu study dy Vr Vru, , Estonia Jekaterina Balicka, Gen Mandre, Ottar Tamm Estonian University of Life Sciences Location in the context of

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SUDS in existing urban context:

case case stu study dy Võr Võru, , Estonia

(D)rain for Life project conference, Pärnu 29.11.2013 Jekaterina Balicka, Gen Mandre, Ottar Tamm

Estonian University of Life Sciences

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Location in the context of Estonia

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  • Võru locates in valley Hargla between Otepää Upland and Upland Haanja
  • City passes St.Petersburg-Pskov-Riga-Tallinn rail and Luhamaa road
  • There are three lakes at the city territory - Tamula (229 ha), Kubija (15,9 ha) ja

Kubija Veskijärv (1,7 ha)

  • Population + 13 482 people living in Võru and 36 403 people in the county (2012)
  • Town of 14 km²

Main characteristics of Võru

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Location of case study area

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Unreformed ¡public ¡land ¡ Private ¡land ¡ Municipal ¡land ¡ Public ¡land ¡

Land ownership

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Terrain

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Problem with stormwater and melting water caused streets and beach errosion In case of extreme rain event rainwater causes the flooding of the street and enters the lake unpurified

Tartu street

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In case of extreme rain event rainwater causes the flooding of the street and area between Tartu and Vabaduse streets in the lower part of the area

Vabaduse street

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Vabaduse street

Big amount of covered surface resulting the flooding of remaining area

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  • Varying groundwater level
  • Low infiltration capacity due to the high number of surfaced area
  • Polluted runoff (salt, traffic pollution) enters the lake unfiltered
  • Erosion
  • Runoff delay to increase evaporation and infiltration
  • Runoff water purification
  • Instruments to stop erosion
  • Instruments to stop flooding

Challenges Needs

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  • 1. Raingardens
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  • 1. Raingardens
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  • 1. Raingardens
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  • 2. Open vegetated drains
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  • 3. Dry infiltration basin and system of ditches
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  • 4. Cobblestone stripe
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Runoff calculations Calculated discharge

To ¡Tartu ¡street ¡ ¡ Q ¡= ¡436 ¡l/s ¡ ¡ To ¡Vabaduse ¡street ¡ Q ¡=136 ¡l/s ¡ ¡ Reten@on ¡pond ¡ ¡ ¡ ¡

Q=249+Vabaduse ¡street ¡ ¡Q ¡ =385 ¡l/s ¡

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  • EVS 848:2003 Municipal sewer system
  • EVS 847:2003 Municipal water supply

USED ¡STANDARDS/NORMS ¡

Q = q × k Ψ × A , where

  • k ¡Ψ ¡– ¡runoff ¡coefficient, ¡depends ¡on ¡surface; ¡
  • A-­‑ ¡watershed ¡area ¡(ha); ¡
  • q ¡– ¡calculated ¡rain ¡intensity ¡l/s ¡(ha). ¡

¡

USED ¡PARAMETERS ¡

  • t – rain endurance 20 min/60 min
  • Stormwater recurrence p = 5 years
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www.drainforlife.eu ¡

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(D)rain for Life project conference, Pärnu 29.11.2013

Project team of Estonian University of Life Sciences: Valdo Kuusemets, project leader valdo.kuusemets@emu.ee Gen Mandre, project manager gen.mandre@emu.ee Jekaterina Balicka, landscape architect jekaterina.balicka@emu.ee Ottar Tamm, researcher ottar.tamm@emu.ee Lauri Lokko, researcher lauri.lokko@emu.ee