*sediment accumulates in the swale, reducing the storage volume;
Inspections during construction are needed to ensure that the wet swale practice is built in accordance with the approved design standards and spec
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...gov/media/5076/download NCDENR Stormwater BMP Manual – Section 14, Grassed Swale].
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*[[Overview for wet swale (wetland channel)]]
*[[Design criteria for wet swale (wetland channel)]]
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...of design elements and design steps for high-gradient stormwater step-pool swale (step pools). The following discussion includes step pools used as [https:/
**Swale layout: [[File:Swale Layout2 (1).pdf]]
65 KB (10,011 words) - 17:11, 29 December 2022
...s, link to the following page - [[Calculating credits for dry swale (grass swale)]]
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==Village of Algonquin, Kane County, Illinois - Step pool swale==
[[File:Step pool figure 1.jpg|300px|thumb|alt=step pool swale image|<font size=3>Failing culvert and gulley formation pre-construction.</
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-
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Additional specifications for items applicable to swale practices can be found in the [http://www.dot.state.mn.us/pre-letting/spec/
Potential techniques that could be used to divert runoff and isolate the dry swale may include one or more of the following:
21 KB (3,094 words) - 20:46, 27 December 2022
...g field monitoring are found at [[Calculating credits for dry swale (grass swale)|this link]].
*[[Terminology for swales|Terminology for high-gradient stormwater step-pool swale]]
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**Silt/sediment should be removed from the step pool and connecting swale bottoms when the accumulation exceeds 1 inch. When the soil/media’s infil
...will reveal whether sedimentation warrants scraping out the step pool and swale bottoms and replanting them.
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<font size=3>'''Summary of costs for dry swale case study - International Plaza Drive Improvements.'''</font size><br>
Link to this [[Summary of costs for dry swale case study - International Plaza Drive Improvements|table]]
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...water, since in reality side slopes and main channels are part of a single swale system. This page provides guidance for routing water to swales in the MIDS
===Swale configuration in the MIDS Calculator===
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*[[Calculating credits for dry swale (grass swale)]]
*[[Calculating credits for dry swale (grass swale)|Step-pool]]
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...an input for using swale in the MIDS calculator. This is the length of the swale channel from the furthest upstream point to the furthest downstream point.
...hould enter the average slope over the entire length rather than break the swale into separate smaller lengths. Based on design restrictions, the channel sl
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**[[Calculating credits for swale]]
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<sup>3</sup> Grass filter/swale<br>
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...bioretention and tree trench (with underdrain) and 0.55 * 0.68 or 36% for swale main channel (with underdrain)
...retention and tree trench (with underdrain) and 0.75 * 0.68 or 51% for dry swale
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...00px|thumb|alt=symbol for swale with no underdrain|<font size=3>Symbol for Swale main channel (without an underdrain) used in the MIDS calculator.</font siz
...lt=Schematic used as a symbol for swale side slope|<font size=3>Symbol for Swale side slope used in the MIDS calculator</font size>]]
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...els are also referred to as biofilters. ([[References for dry swale (grass swale)|Seattle METRO]], 1992 from CWP)
...swale is quickly dewatered. In the event that surface soils clog, the dry swale has a pea gravel window on the downstream side of each checkdam to route wa
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...wale.jpg|300 px|thumb|alt=photo of a dry swale|<font size=3>Photo of a dry swale. Courtesy of Limnotech.</font size>]]
..., slope failure, or down gradient flooding exist and cannot be overcome by swale design modifications.
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<td>[[File:highway swale 2.png|center|100px]]</td>
<td>[[File:Highway swale.png|center|100px]]</td>
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[[File:Dry swale figure 1.png|400px|thumb|alt=dry swale image|<font size=3>Views of International Plaza Drive and pavement failure
'''Design Features''': Dry swale, rocked inlets and check dams<br>
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<td>Dry swale</td>
<td>Wet swale</td>
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...kes city hall.jpg|300px|thumb|alt=Image of a swale|<font size=3>Image of a swale at Lino Lakes city hall</font size>]]
...ose to the surface or water does not readily drain out of the swale. A wet swale acts as a very long and linear shallow biofiltration or linear wetland trea
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...gned to infiltrate water and remove sediment and pollutants from runoff. A swale, therefore, assists in recharging ground water and managing stormwater runo
...ustain the integrity of stream ecosystem habitats. Maintaining a buffer or swale upstream of surface waters reduces pollutant impacts from sediment, phospho
11 KB (1,638 words) - 18:36, 22 November 2022
...els are also referred to as biofilters. ([[References for dry swale (grass swale)|Seattle METRO]], 1992 from CWP)
...swale is quickly dewatered. In the event that surface soils clog, the dry swale has a pea gravel window on the downstream side of each checkdam to route wa
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<sup>2</sup> Grass filter/swale<br>
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**swale main channel (with underdrain)
...nput the average cross-sectional area of the bioretention base beneath the swale. The volume credit is then given by the bioretention area times the biorete
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...ile:Vegetated swale city of Wayzata.jpg|thumb|150px|alt=Photo of vegetated swale city of Wayzata|]]</td>
<td>A swale is a wide, shallow, vegetated depression in the ground designed to channel
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Wet swale practices can be an important tool for retention and detention of stormwate
==Construction specifications for swale practices==
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<td>Bioretention, dry swale, permeable pavement, tree trench/box</td>
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<td>Dry swale or grassed channel</td>
*Do not incorporate check dams unless the swale or channel incorporates an underdrain. Otherwise small areas of infiltrati
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