Volume 2-05, Chapter 3 - City of Wichita
Volume 2-05, Chapter 3 - City of Wichita Volume 2-05, Chapter 3 - City of Wichita
Chapter 3 - Table of Contents Figure 3-30 Typical Sand Filter Media Cross Sections ......................................................................................... 104 Figure 3-31 Example Surface Sand Filter Perforated Stand-Pipe ........................................................................ 105 Figure 3-32 Schematic of Surface Sand Filter ...................................................................................................... 109 Figure 3-33 Bioretention Area Examples .............................................................................................................. 112 Figure 3-34 Bioretention area examples ............................................................................................................... 113 Figure 3-35 Schematic of a Typical Bioretention Area ......................................................................................... 123 Figure 3-36 Schematic of a Typical On-Line Bioretention Area ............................................................................ 124 Figure 3-37 Schematic of a Typical Off-Line Bioretention Area ............................................................................ 125 Figure 3-38 Schematic of a Typical Inlet Deflector ............................................................................................... 126 Figure 3-39 Stormwater Wetland Examples ......................................................................................................... 129 Figure 3-40 Typical Wetland Facility Outlet Structure .......................................................................................... 135 Figure 3-41 Schematic of Shallow Wetland .......................................................................................................... 141 Figure 3-42 Schematic of Extended Detention Shallow Wetland ......................................................................... 142 Figure 3-43 Schematic of Pond/Wetland System ................................................................................................. 143 Figure 3-44 Schematic of an Example Gravity (Oil-Water) Separator .................................................................. 155 Figure 3-45 Alum Treatment System and Injection Equipment ............................................................................ 160 Figure 3-46 Example of an Underground Sand Filter ........................................................................................... 162 Figure 3-47 Underground (DC) Sand Filter Volumes............................................................................................ 167 Figure 3-48 Perimeter Sand Filter Volumes .......................................................................................................... 168 Figure 3-49 Typical Sand Filter Media Cross Sections ......................................................................................... 168 Figure 3-50 Schematic of an Underground (D.C.) Sand Filter .............................................................................. 173 Figure 3-51 Schematic of Perimeter (Delaware) Sand Filter ................................................................................ 174 Figure 3-52 Schematic of Organic Filter ............................................................................................................... 178 Figure 3-53 Schematic of a Basic Conventional Dry Detention Pond .................................................................. 185 Figure 3-54 Example Underground Detention Tank System ................................................................................ 190 Figure 3-55 Schematic of Typical Underground Detention Vault .......................................................................... 191 Figure 3-56 Porous Concrete System Section ...................................................................................................... 198 Figure 3-57 Porous Concrete System Installation ................................................................................................ 199 Figure 3-58 Typical Porous Concrete System Applications .................................................................................. 199 Figure 3-59 Examples of Modular Porous Pavers ................................................................................................ 205 Figure 3-60 Modular Porous Paver System Section ............................................................................................. 206 Figure 3-61 Typical Modular Porous Paver System Applications ......................................................................... 206 Figure 3-62 Typical Green Roof Cross Section .................................................................................................... 211 Page 3 - vi Volume 2, Technical Guidance
Section 3.1 - Stormwater Management Controls Overview 3.1 Stormwater Management Controls Overview 3.1.1 Stormwater Management Controls - Categories and Applicability 3.1.1.1 Introduction Stormwater management structural controls are engineered facilities intended to treat stormwater runoff and/or mitigate the effects of increased stormwater runoff peak rate, volume, and velocity due to development. This section provides an overview of structural stormwater controls (also called stormwater management facilities) that can be used to address local stormwater management standards. Many of the structural stormwater controls can be used in an Integrated Site Design (ISD) approach, where a control (or set of controls) are designed and constructed to achieve multiple objectives: 1) water quality control; 2) channel protection; and 3) flood control. More information on the ISD Approach is provided in Volume 2, Chapter 1. 3.1.1.2 Control Categories The stormwater management controls recommended in this Manual vary in their applicability and ability to meet stormwater management goals. These stormwater controls fall into three categories, depending upon their applicability to remove the pollutant of concern for both the City of Wichita and Sedgwick County which is total suspended solids (TSS). The three categories are: primary TSS treatment facilities, secondary TSS treatment facilities, and other stormwater management facilities. Primary TSS Treatment Facilities Primary TSS treatment facilities are structural controls that have the ability to effectively treat the Water Quality Volume (WQ v ) and have been shown to be able to remove up to 90% of the annual average total suspended solids (TSS) load in typical post-development urban runoff when designed, constructed, and maintained in accordance with recommended specifications. These controls are recommended for use with a wide variety of land uses and development types. Several of these controls can also be designed to achieve other ISD approach objectives, that is, downstream channel protection and/or flood control. Primary TSS treatment facilities are recommended for a site wherever feasible and practical. Secondary TSS Treatment Facilities Secondary TSS treatment facilities are recommended only for limited use or for special site or design conditions. Generally, these practices are: (1) intended to address “hotspot” or specific land use constraints or conditions; and/or, (2) have high or special maintenance requirements that may discourage their use. These types of structural controls are typically used for water quality treatment only. Some of these controls can be used as a pretreatment measure or in series with other structural controls to meet pollutant removal goals. Volume 2, Technical Guidance Page 3 - 1
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<strong>Chapter</strong> 3 - Table <strong>of</strong> Contents<br />
Figure 3-30 Typical Sand Filter Media Cross Sections ......................................................................................... 104<br />
Figure 3-31 Example Surface Sand Filter Perforated Stand-Pipe ........................................................................ 1<strong>05</strong><br />
Figure 3-32 Schematic <strong>of</strong> Surface Sand Filter ...................................................................................................... 109<br />
Figure 3-33 Bioretention Area Examples .............................................................................................................. 112<br />
Figure 3-34 Bioretention area examples ............................................................................................................... 113<br />
Figure 3-35 Schematic <strong>of</strong> a Typical Bioretention Area ......................................................................................... 123<br />
Figure 3-36 Schematic <strong>of</strong> a Typical On-Line Bioretention Area ............................................................................ 124<br />
Figure 3-37 Schematic <strong>of</strong> a Typical Off-Line Bioretention Area ............................................................................ 125<br />
Figure 3-38 Schematic <strong>of</strong> a Typical Inlet Deflector ............................................................................................... 126<br />
Figure 3-39 Stormwater Wetland Examples ......................................................................................................... 129<br />
Figure 3-40 Typical Wetland Facility Outlet Structure .......................................................................................... 135<br />
Figure 3-41 Schematic <strong>of</strong> Shallow Wetland .......................................................................................................... 141<br />
Figure 3-42 Schematic <strong>of</strong> Extended Detention Shallow Wetland ......................................................................... 142<br />
Figure 3-43 Schematic <strong>of</strong> Pond/Wetland System ................................................................................................. 143<br />
Figure 3-44 Schematic <strong>of</strong> an Example Gravity (Oil-Water) Separator .................................................................. 155<br />
Figure 3-45 Alum Treatment System and Injection Equipment ............................................................................ 160<br />
Figure 3-46 Example <strong>of</strong> an Underground Sand Filter ........................................................................................... 162<br />
Figure 3-47 Underground (DC) Sand Filter <strong>Volume</strong>s............................................................................................ 167<br />
Figure 3-48 Perimeter Sand Filter <strong>Volume</strong>s .......................................................................................................... 168<br />
Figure 3-49 Typical Sand Filter Media Cross Sections ......................................................................................... 168<br />
Figure 3-50 Schematic <strong>of</strong> an Underground (D.C.) Sand Filter .............................................................................. 173<br />
Figure 3-51 Schematic <strong>of</strong> Perimeter (Delaware) Sand Filter ................................................................................ 174<br />
Figure 3-52 Schematic <strong>of</strong> Organic Filter ............................................................................................................... 178<br />
Figure 3-53 Schematic <strong>of</strong> a Basic Conventional Dry Detention Pond .................................................................. 185<br />
Figure 3-54 Example Underground Detention Tank System ................................................................................ 190<br />
Figure 3-55 Schematic <strong>of</strong> Typical Underground Detention Vault .......................................................................... 191<br />
Figure 3-56 Porous Concrete System Section ...................................................................................................... 198<br />
Figure 3-57 Porous Concrete System Installation ................................................................................................ 199<br />
Figure 3-58 Typical Porous Concrete System Applications .................................................................................. 199<br />
Figure 3-59 Examples <strong>of</strong> Modular Porous Pavers ................................................................................................ 2<strong>05</strong><br />
Figure 3-60 Modular Porous Paver System Section ............................................................................................. 206<br />
Figure 3-61 Typical Modular Porous Paver System Applications ......................................................................... 206<br />
Figure 3-62 Typical Green Ro<strong>of</strong> Cross Section .................................................................................................... 211<br />
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<strong>Volume</strong> 2, Technical Guidance
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