Detailed Stormwater Management Practice Design - Tauranga City ...

More documents

Recommendations

Info

SMG-9 Table 11 Grasses, Ground Covers and Other Plants Grasses, Ground Description Covers, and other Plants Arthropodium cirratum Rengarenga, renga lily Asplenium bulbiferum mouku, hen and chicken fern Asplenium oblongifolium huruhuruwhenua, shining spleenwort Astelia banksii kowharawhara, coastal astelia Astelia solandri kowharawhara, perching astelia Carex flagellifera manaia, Glen Murray tussock Carex testacea sedge Cortaderia fulvida toetoe Dianella nigra turutu Disphyma australe glasswort Doodia media pukupuku, rasp fern Libertia grandiflora & L. ixioides mikoikoi, native iris Phormium cookianum wharariki, mountain flax Phormium tenax harakeke, flax SMG-9.4.4.2 Detailed Design Procedure A lily with fleshy pale green – greyish leaves and white flowers. Ground cover in semi shady situation A robust fern with small plantlets produced on the fronds. Tolerates dryness and prefers shade Fern with large shiny fronds. Tolerates dryness. Prefers shade Clump forming plant up to a metre high with flax-like leaves. Requires semishade. Tolerates full exposure. Frost tender An epiphytic plant in natural situations. Long drooping bright green leaves. Tolerates dryness. Prefers shade Sedge up to 70cm high with reddish-brown spreading foliage. Prefers damp soil and full sun. Tolerates exposure Coastal sedge up to 40cm high with shiny orange foliage. Prefers full sun and exposure. Tolerates dry soil conditions Branching from the base and forming a clump to 4m high. Long strap-shaped leaves with red-orange coloured veins. Prefers good drainage and semishade Lily with reddish leaves, and striking violet-blue fruit. Ground cover; prefers open well-drained situation Fleshy leaved ground cover with mauve flowers in the spring. Tolerates drought and full exposure. Frost tender Hardy fern growing to 25cm. Young fronds coloured bright red when in full sun. Sensitive to frost Clump forming native irises with narrow, upright leaves. Small white flowers in spring. Sun or shade Clump-forming flax with yellow – green drooping leaves, to 2m. Full exposure and sun Clump-forming flax with large stiff leaves, to 3 m. Full exposure and sun Refer to DS-5 Stormwater of the Infrastructure Development Code for more detailed design information. SMG-9.4.5 Infiltration Infiltration practices are designed and constructed to capture and treat stormwater runoff through: Page 34 Updated 01/11/2012
a) Filtration. b) Infiltration. c) Adsorption. d) Biological Uptake. SMG-9 Figure 16 Infiltration SMG-9 Table 12 Stormwater Management Function - Infiltration Water Quality Metals Sediment TPH Flood Protection x Stream Channel Erosion Protection Infiltration practices direct urban stormwater away from surface runoff paths and into the underlying soil. In contrast to surface detention methods, which are treatment or delay mechanisms that ultimately discharge all runoff to streams, infiltration diverts runoff into groundwater. Of all the traditional stormwater management practices, infiltration is one of the few practices (together with revegetation and rain tanks) that reduce the overall volume of stormwater being discharged. Page 35 Updated 01/11/2012
Page 1: SMG-9 - Detailed Stormwater Managem
Page 4 and 5: In the same regard reducing total s
Page 6 and 7: As an example, a stormwater managem
Page 8 and 9: SMG-9 Table 2 Stormwater Management
Page 10 and 11: The following points require some d
Page 12 and 13: e) Select a swale shape. Two shapes
Page 14 and 15: SMG-9.4.1.3 Flows in Excess of the
Page 16 and 17: SMG-9.4.1.6 Swale Case Study Refer
Page 18 and 19: SMG-9.4.2.1 Basic Design Parameters
Page 20 and 21: ) Once the peak discharge is determ
Page 24 and 25: SMG-9 Figure 11 - Diversion Weir SM
Page 26 and 27: tf = time required for runoff to pa
Page 28 and 29: c) Infiltration (depending on soils
Page 30 and 31: Rain Garden design differs only sli
Page 32 and 33: SMG-9.4.4.1.1 Filter Media Filter m
Page 34 and 35: SMG-9.4.4.1.5 Transition Layer The
Page 38 and 39: Infiltration practices are used for
Page 40 and 41: SMG-9 Figure 19 Schematic of a Soak
Page 42 and 43: Any impermeable soil layer close to
Page 46 and 47: SMG-9 Figure 21 Soil Textural Trian
Page 48 and 49: e) Calculate the practice depth and
Page 50 and 51: SMG-9.4.6.1 Types of Pond Ponds are
Page 52 and 53: A study in the U.S.A (DNR. 1986) in
Page 54 and 55: Where there are downstream flooding
Page 56 and 57: There may be mitigation requirement
Page 58 and 59: SMG-9.4.6.12 Pond Aesthetics and La
Page 60 and 61: SMG-9 Figure 25 Schematic of a Stor
Page 62 and 63: When an extended detention orifice
Page 64 and 65: The forebay should meet the followi
Page 66 and 67: Requiring, during design, safety fe
Page 68 and 69: Until recently, the filling and dra
Page 70 and 71: The most common design priority for
Page 72 and 73: SMG-9.4.7.1.2 Water Quality Volumes
Page 74 and 75: The design steps are the following:
Page 76 and 77: For the purposes of this guideline,
Page 78 and 79: SMG-9.4.8.7 Detailed Design Procedu
Page 80 and 81: This is indicated on SMG-9 Figure 3
Page 82 and 83: SMG-9 Figure 37 - Waitakere City Co
Page 84 and 85: SMG-9.4.9.7.7 Stormwater Management
Page 86 and 87:
SMG-8 Figure 8b - Information on ra
Page 88 and 89:
SMG-9.4.10.5 Advantages of Water Ta
Page 90 and 91:
SMG-9 Figure 39 Calculation of Rood
Page 92 and 93:
The 15% wastage factor accounts for
Page 94 and 95:
Commercial and industrial sites wil
Page 96 and 97:
SMG-9 Table 24 Stormwater Managemen
Page 98 and 99:
SMG-9.4.11.2 Separator Size The siz
Page 100 and 101:
VH = Q/1.125 Calculate the surface
Page 102 and 103:
When an outfall is sited in a coast
Page 104 and 105:
SMG-9.5.1.3 Riprap Aprons Outlet pr
Page 106 and 107:
SMG-9 Figure 46 Angled Entry of Out
Page 108 and 109:
SMG-9 - Appendix A Case Studies SMG
Page 110 and 111:
SMG-9 Apx A.2 Filter Strip Case Stu
Page 112 and 113:
SMG-9 Apx A.3 Sand Filter Case Stud
Page 114 and 115:
SMG-9 Apx A.4 Rain Garden Case Stud
Page 116 and 117:
SMG-9 Apx A.5 Infiltration Case Stu
Page 118 and 119:
SMG-9 Apx A.6 Ponds Case Study SMG-
Page 120 and 121:
SMG-9 Table A.6.3 Stage-Storage Rel
Page 122 and 123:
Outflow from ED orifice = Q = 0.62A
Page 124 and 125:
= (Qn/d 1.67 s 0.5 ) - Zd b = ((.04
Page 126 and 127:
SMG-9 Apx A.8.3 Design Water qualit
Page 128 and 129:
SMG-9 Apx A.9 Green Roof Case Study
Page 130 and 131:
Extended detention orifice sizing -
Page 132 and 133:
The minimum width and depth require
Page 134 and 135:
SMG-9 Table B.1.2a Particle Charact
Page 136 and 137:
Particle Diameter (µm) SMG-9 Table
Page 138 and 139:
SMG-9 Figure B.1.3 Wetland Process
Page 140 and 141:
Plants do take up nutrients or meta
show all

Detailed Stormwater Management Practice Design - Tauranga City ...

Create successful ePaper yourself

Delete template?

Save as template?