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===Overview===

===Overview===

<p>Swales are linear landscape features consisting of a drainage channel with gently sloping sides. Underground they may be filled with engineered soil and/or contain a water storage layer of coarse gravel material. Two variations on a basic swale are recommended as low impact development strategies, although using a combination design of both may increase the benefits:<br>

<p>Swales are linear landscape features consisting of a drainage channel with gently sloping sides. Underground they may be filled with engineered soil and/or contain a water storage layer of coarse gravel material. Two variations on a basic swale are recommended as low impact development strategies, although using a combination design of both may increase the benefits:

<strong>Bioswales</strong> are sometimes referred to as 'dry swales', 'vegetated swales', 'water quality swales' or 'inline bioretention'. This type of structure is similar to a [[Bioretention cells|bioretention cell]] but with a long linear shape (surface area typically >2:1 length:width )<br>

    <br><strong>Bioswales</strong> are sometimes referred to as 'dry swales', 'vegetated swales', or 'water quality swales'. This type of structure is similar to a [[Bioretention cells|bioretention cell]] but with a long linear shape (surface area typically >2:1 length:width )

<strong>Enhanced Grass Swales</strong> are a lower maintenance alternative, but generally have lower stormwater management potential. The enhancement over a basic grass swale is in the addition of check dams to slow surface water flow and create small temporary pools of water which can infiltrate the underlying soil.

    <br><strong>Enhanced Grass Swales</strong> are a lower maintenance alternative, but generally have lower stormwater management potential. The enhancement over a basic grass swale is in the addition of check dams to slow surface water flow and create small temporary pools of water which can infiltrate the underlying soil.

</p>  

</p>

{{TextBox|1=Swales are an ideal technology for:  

{{TextBox|1=Swales are an ideal technology for: *Sites with long linear landscaped areas, such as parking lots *Connecting with one or more other types of LID}}

*Sites with long linear landscaped areas, such as parking lots

*Connecting with one or more other types of LID}}

<table class = "table-responsive" table class = "table table-striped">

<table class="table-responsive" table class="table table-striped">

<caption><strong>Types of Swales</strong></caption>

    <caption><strong>Types of Swales</strong></caption>

<tr class ='success'><th>Property</th><th>Bioswale</th><th>Enhanced Grass Swale</th></tr>

    <tr class='success'>

<tr><td>Surface water</td><td>Minimal<br>Any surface flow can be slowed with check dams</td><td>Ponding is encouraged with check dams</td></tr>

        <th>Property</th>

<tr><td>Engineered soil</td><td>Biomedia required</td><td>Amendment preferable when possible</td></tr>

        <th>Bioswale</th>

<tr><td>Underdrain</td><td>Common</td><td>Uncommon</td></tr>

        <th>Enhanced Grass Swale</th>

<tr><td>Maintenance</td><td>Medium to high</td><td>Low</td></tr>

    </tr>

<tr><td>Stormwater benefit</td><td>High</td><td>Medium</td></tr>

    <tr>

<tr><td>Biodiversity benefit</td><td>Increased with native planting</td><td>Lower</td></tr>

        <td>Surface water</td>

        <td>Minimal

            <br>Any surface flow can be slowed with check dams</td>

        <td>Ponding is encouraged with check dams</td>

    </tr>

    <tr>

        <td>Engineered soil</td>

        <td>Biomedia required</td>

        <td>Amendment preferable when possible</td>

    </tr>

    <tr>

        <td>Underdrain</td>

        <td>Common</td>

        <td>Uncommon</td>

    </tr>

    <tr>

        <td>Maintenance</td>

        <td>Medium to high</td>

        <td>Low</td>

    </tr>

    <tr>

        <td>Stormwater benefit</td>

        <td>High</td>

        <td>Medium</td>

    </tr>

    <tr>

        <td>Biodiversity benefit</td>

        <td>Increased with native planting</td>

        <td>Lower</td>

    </tr>

</table>

</table>

<p><strong>The fundamental components of a swale are:</strong>

<p><strong>The fundamental components of a swale are:</strong>

<ul>

    <ul>

<li>Graded channel</li>

        <li>Graded channel</li>

<li>Planting</li>

        <li>Planting</li>

</ul>

    </ul>

<strong>Additional components may include:</strong>

    <strong>Additional components may include:</strong>

<ul>

    <ul>

<li>[[Biomedia]] - an engineered soil mix</li>

        <li>[[Biomedia]] - an engineered soil mix</li>

<li>[[Underdrain]] with clean out and inspection ports</li>

        <li>[[Underdrain]] with clean out and inspection ports</li>

<li>[[Liner|Impermeable membrane]] to prevent infiltration to soils below</li>

        <li>[[Liner|Impermeable membrane]] to prevent infiltration to soils below</li>

<li>[[Turf reinforcement]] to prevent scour</li>

        <li>[[Turf reinforcement]] to prevent scour</li>

<li>Check dams</li>

        <li>Check dams</li>

</ul>

    </ul>

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20161024 100338 550x550.jpg| Bioswale?

            20161024 100338 550x550.jpg| Bioswale, County Court Boulevard, Brampton

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