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Moriyama and Teshima, Wadi Restoration in Riyadh - GBF2010


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George Stockton and Ajon Moriyama present on the restoration of Wadi Hanifah in Riyadh Saudi Arabia at the 2010 Green Building Festival in Toronto.

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Moriyama and Teshima, Wadi Restoration in Riyadh - GBF2010

  1. 1. Wadi Hanifah Background Wadi Hanifah Restoration
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  13. 13. Kingdom of Saudi Arabia High Commission for the Development of Arriyadh Arriyadh Development Authority Wadi Hanifah Restoration
  14. 14. 1970 0 6 12 Km
  15. 15. 0 6 12 Km 1940 1950 1970 1980 1996 2005
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  26. 27. Condition of the Wadi 2001 Wadi Hanifah Restoration Wadi Hanifah Restoration
  27. 28. Environmental Degradation Loss of natural functioning and ecosystem productivity. Unsustainable use of land, water, energy and other resources. Loss of habitat and indigenous species. Wadi Hanifah Restoration
  28. 29. Illegal dumping Lack of Development Controls Encroachments Uncoordinated infrastructure installation Wadi Hanifah Restoration
  29. 30. Uncontrolled discharges and unauthorised connections Riyadh’s Urban Wastewater flows into Wadi Hanifah Seasonal flooding Poor water quality Wadi Hanifah Restoration
  30. 31. General waste of potentially valuable water recycling resource Wadi Hanifah Restoration
  31. 32. • Urban waste water was loaded with coliform bacteria and nutrients - a hazard for human contact. • Dumping placed harmful substances into human contact as well as contaminating the soil and water. • Standing water was breeding mosquitoes – concern over west Nile virus and dengue fever. • Industrial effluent was being poured into the Wadi. • Sewage Treatment Plant effluent flowing into the Wadi needed improving. Wadi Hanifah Restoration Community Health Issues:
  32. 33. <ul><li>• Phragmities had completely invaded the wet portions of the Wadi choking, the open water and destroying habitat. </li></ul><ul><li>• No municipal maintenance, so everything that was dumped stayed there. </li></ul><ul><li>• Seasonal flooding brought loss of life and property damage. </li></ul><ul><li>• Poor roads with no place for pedestrians - safety issues. </li></ul><ul><li>• Entire communities came into daily contact with this mess. </li></ul><ul><li>• The greatest risk to community health was to the children playing along the Wadi bed and in the water. </li></ul>Wadi Hanifah Restoration Community Health Issues:
  33. 34. Planning for the Future Wadi Hanifah Restoration
  34. 35. Riyadh Historical Importance of Wadi Hanifah to the City of Arriyadh Future Generations Riyadh
  35. 36. Living Wadi Wadi Hanifah Restoration
  36. 37. Living Wadi sustainable oasis Wadi Hanifah Restoration
  37. 38. clean green safe & healthy Living Wadi Wadi Hanifah Restoration
  38. 39. connects people and land through space and time Living Wadi Wadi Hanifah Restoration
  39. 40. creates new opportunities Living Wadi Wadi Hanifah Restoration
  40. 41. Wadi Hanifah Master Plan: Water Resources Management Plan Environmental Plan Land Use Plan Wadi Hanifah Restoration
  41. 42. Promotes ecologically sustainable uses within Wadi Hanifah and its total watershed. Designates Environmental Policy Areas based on broad physiographic and ecological parameters. Outlines management strategies for protecting and regenerating the biological functioning of the Wadi ecosystem. Regenerates habitat within the watershed for animals having significant species status. Environmental Plan Wadi Hanifah Restoration
  42. 43. Provides for: Planning the watershed and all its parts as an interrelated whole; Improvement of flood performance and flood management; Removal of threats to water quality; Biological remediation and reuse of urban waste water; and Makes available large volumes of cleaned water for recycling and greening. Water Resources Management Plan Wadi Hanifah Restoration
  43. 44. Land Use Plan Sets the framework for restoration, conservation, development, education and stewardship within Wadi Hanifah covering the entire watershed. Defines all land uses with the 4,500 sq. km. Wadi Hanifah Reserve. Contains a mix of : Environmental protectorates and open space New agriculture Parklands for recreation and leisure Tourism and eco-tourism uses Existing residential Villages Existing agriculture Designates a Wadi Hanifah boundary where special planning and policies apply. Wadi Hanifah Restoration
  44. 45. Wadi Hanifah Master Plan Living Wadi
  45. 46. <ul><ul><ul><li>120 km long watershed running northwest to southeast </li></ul></ul></ul>
  46. 47. <ul><ul><ul><li>Arriyadh Metropolitan Structure Plan 2001 Urban Limits </li></ul></ul></ul>
  47. 48. <ul><ul><ul><li>Wadi Hanifah Master Plan boundaries </li></ul></ul></ul>
  48. 49. <ul><ul><ul><li>The Living Wadi </li></ul></ul></ul><ul><ul><ul><li>clean, green, safe and healthy </li></ul></ul></ul>
  49. 50. <ul><ul><ul><li>Incorporates all existing compatible uses including residential and agricultural districts </li></ul></ul></ul>
  50. 51. <ul><ul><ul><li>Becomes continuous parkland and open space </li></ul></ul></ul>
  51. 52. <ul><ul><ul><li>Linkages along the side wadis for connectivity with the city </li></ul></ul></ul>
  52. 53. <ul><ul><ul><li>Bioremediation areas in the south </li></ul></ul></ul>
  53. 54. <ul><ul><ul><li>Reconstructed natural features along the side wadis </li></ul></ul></ul>
  54. 55. <ul><ul><ul><li>Naturalized Parklands throughout Wadi Hanifah </li></ul></ul></ul>
  55. 56. <ul><ul><ul><li>New agriculture in the south </li></ul></ul></ul>
  56. 57. <ul><ul><ul><li>Major tourism nodes at Addiriyyah and Al Hair </li></ul></ul></ul>
  57. 58. <ul><ul><ul><li>Major urban renewal node at Al Uraija </li></ul></ul></ul>
  58. 59. <ul><ul><ul><li>Continuous Recreational/ Interpretative Trail </li></ul></ul></ul>
  59. 60. MASTER PLAN
  60. 61. Achieving Ecological Sustainability Wadi Hanifah Restoration
  61. 62. • Designing with ecologically sustainable practices, rehabilitation, conservation and protection on a site by site basis. • Cleaning the water flowing into and through the Wadi. • Cleaning contamination hot spots. • Restoring heavily degraded landforms. • Protecting areas of regenerating habitat and creating new habitat. • Restoring the biodiversity of indigenous plants and wildlife. • Improving land use management practices along the Wadi. Wadi Hanifah Restoration Creating a clean, green, safe and healthy environment by:
  62. 63. Achieving effective re-use of precious water resources by: Wadi Hanifah Restoration • Reducing the dependency on costly imported water through re-use of recycled water as a substitution for potable water for non-drinking applications. • Bio-remediating urban waste water flows and recycling water to the Wadi and Riyadh. • Increasing the availability of treated sewage effluent for agricultural irrigation and greening of the Wadi open spaces. • Capturing seasonal surface runoff to increase soil moisture for greening open spaces.
  63. 64. Wadi Hanifah Restoration Managing available cleaned Wadi water for socio-ecomomic benefits: • Envisioning Wadi water resources as one comprehensively considered integrated system of ground water, storm water and treated effluent. • Extending the life-cycle of the water within the Wadi system by capturing it for reuse and multi-use. • Creating a safer Wadi environment with a better performing bed and channel that slows down and disperses periodic flood flows. • Improving the health of the Wadi by removing areas of stagnant water.
  64. 65. Heritage Management Wadi Hanifah Restoration
  65. 66. Preserving the Wadi for future generations by: Wadi Hanifah Restoration • Conserving its bio-diversity and natural heritage. • Protecting the unspoiled environmental and scenic values of grasslands, acacia forests, desert rangelands, upper side wadis, Wadi walls and wetlands. • Conserving and promoting the value of cultural nodes, historic settlements and structures and relic palm groves. • Recommending pristine Wadi landscapes be protected as national parks. • Providing opportunities for interpretation and learning.
  66. 67. Environmentally Sensitive Practices Wadi Hanifah Restoration
  67. 68. Working with the natural processes of the Wadi for environmental sustainability: Wadi Hanifah Restoration • Establishing naturalized parklands, not european-style parks, along the Wadi bed to provide public open space. • Utilizing water and nutrient resources of the Wadi to restore the ecology and habitat. • Re-vegetating side wadis and naturalized wadi bed parklands with only the indigenous plant species and of the same gene pool native to the region. • Constructing planting cells throughout the Wadi as micro plant nurseries for greening.
  68. 69. Wadi Hanifah Restoration Project Landscaping and Naturalization
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  72. 73. Working with the natural processes of the Wadi for environmental sustainability: Wadi Hanifah Restoration • Developed a major bio-remediation facility for cleaning water in the main channel that is purely biological, not mechanical. Its function is to reduce coliform bacteria, de-nitrify the water and bio- accumulate excess nutrients. • Recently have begun the rehabilitation of six of the side wadis that comprise part of the watershed.
  73. 75. Wadi Hanifah Restoration Project Bioremediation
  74. 76. Wadi Hanifah Restoration Project Bioremediation
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  83. 85. Based upon early testing and analysis - five months of data sets from August 2009 to January 2010 the Bio-remediation Facility is performing beyond expectations: Wadi Hanifah Restoration • Suspended solids removal rates are high (clear water). • Ammonia removal rates are high. • Fecal and total coliform removal rates are significant. • System is functioning without odors from the water. • Aquatic and higher life forms (fish) are thriving.
  84. 86. Enhancement of the Landscape Wadi Hanifah Restoration
  85. 87. Providing safe, easy access along the Wadi for local residents and city visitors by: Wadi Hanifah Restoration • Reducing the scale of the Wadi roads for only visitor and local traffic. • Reducing access between the surrounding road networks, diverting traffic away from the Wadi, restricting vehicle types, and breaking the continuous Wadi road. • Providing convenient wadi road lay-by parking. • Developing a continuous interpretative/recreational trail.
  86. 88. Relocating utilities from the Wadi environment: Wadi Hanifah Restoration • Reducing the visual clutter and intrusion of the electrical utilities along the Wadi. • Relocating existing utilities, as far as practicable, to a dedicated underground utility corridor.
  87. 89. Providing a new Wadi landscape for the people of Riyadh: Wadi Hanifah Restoration • Developing Wadi Hanifah and its side wadis as continuous naturalized landscape. • Creating major parkland nodes some with significant water features. • Developing a continuous recreational trail system. • Providing opportunities for people to be in contact with water.
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  105. 108. Wadi Hanifah Restoration • Removed 1,500,000 m3 of dumping. • Flood-proofed 70km. of Wadi bed. • Relocated all piped utilities and removed all overhead Utilities (relocated underground) • Re-designed Wadi road system to reduce road widths and rationalized road system into single Wadi route. • Implemented channel system designed to biologically remediate wastewater as it flows through channel. • Completed construction of Bio-remediation Facility consisting of 134 bio-cells. Constructed on-site testing laboratory with four scientists on site. • Bio-remediation Facility is developing the biology that will do the work of cleaning the water and is performing beyond expectations. Wadi Hanifah Outcomes
  106. 109. Wadi Hanifah Restoration • Designed and built 6 major landmark parks, three parks with lakes. • Two new parks are under construction. • Constructed 14 toilet blocks. • Constructed 10 mirab prayer areas. • Designed and built 43 km. of walking trails running throughout entire Wadi park system. • Installed 2,000 light standards along Wadi roads and walking trail system. • Constructed 3,000 lay-by and parking spaces along the length of the Wadi park system. • Constructed 63 km. of naturalized parklands. • Constructed thousands of planting cells throughout the naturalized parklands. Wadi Hanifah Outcomes
  107. 110. Wadi Hanifah Restoration • Constructed 7 km. of palm tree lined pedestrian promenades. • Planted 60,000 indigenous shade trees.. • Planted 6,000 date palm trees. • “ Branded” the Wadi and installed 550 pieces of signage both wayfinding and interpretative. • The Wadi is significantly greener and the water is cleaner. • Wildlife is returning to the Wadi. • A high level of maintenance is being carried out daily throughout the Wadi. • The people of Riyadh are coming to enjoy the Wadi by the thousands. • School and university students are using the Wadi as a learning and research tool. Wadi Hanifah Outcomes
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  109. 113. Thank You Wadi Hanifah Restoration