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Line 69: − + − + − − <imagemap> − File:Deep monitoring well.png |thumb|600px|Cross-section view of a partial infiltration bioretention cell with a deep monitoring well. For further details click here for [https://sustainabletechnologies.ca/app/uploads/2016/08/LID-IM-Guide-2016-1.pdf STEP's, Low Impact Development Stormwater Management Practice Inspection and Maintenance Guide (Pg. 195 - 204).] <span style="color:red">''A note: The following is an "image map", feel free to explore the image with your cursor and click on highlighted labels that appear to take you to corresponding pages on the Wiki.''</span> − − rect 803 892 1650 1174 [[Filter Media|Filter Media]] − rect 803 1180 1650 1323 [[Choker layer|Choker Layer (HPB)]] − rect 800 1326 1650 1489 [[Reservoir aggregate|Clear Stone]] − rect 800 737 1656 886 [[Mulch|Mulch]] − rect 2087 1365 2120 1529 [[Digital technologies|Water Level Sensor]] − rect 2843 1614 3380 1702 [[Digital technologies|Water Level Sensor]] − rect 2715 1386 3161 1556 [[Wells|(Piezometer) Perforated Pipe]] − rect 2166 877 2178 1195 [[Geotextiles|Geotextile Sock]] − rect 2691 968 3119 1059 [[Geotextiles|Geotextile Sock]] − rect 2163 604 2181 740 [[Wells|Well Casing]] − rect 2651 649 3022 734 [[Wells|Well Casing]] − rect 2509 431 3298 598 [[Wells|Locked Well Cap]] − rect 2011 546 2193 592 [[Wells|Locked Well Cap]] − rect 2257 0 2585 328 [[Wells|Locked Well Cap]] − rect 1592 97 2069 224 [[Overflow|Overflow]] − rect 1635 646 1753 734 [[Overflow|Overflow]] − rect 436 1138 763 1307 [[Pipes|Overflow Pipe]] − rect 414 1489 1704 1562 [[Pipes|Overflow Pipe]] − rect 426 752 754 1113 [[Soil groups|Native Soil]] − rect 712 288 2011 646 [[Plant Lists|Vegetation]] − </imagemap> − + Line 92:
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==Deep wells==
==Deep wells==
Many types of LID practices are designed to retain water within an internal water storage reservoir or layer (e.g. full and partial infiltration [[Bioretention|bioretention], [[Stormwater tree trench|stormwater tree trench]] and [permeable pavements|permeable pavement]] designs, infiltration trenches and chambers, and exfiltration trenches). To facilitate measurement of water level in the internal water storage reservoir or layer and periodically evaluate drainage performance over the operating life cycle of the facility, include a monitoring well located in the lowest elevation portion of the practice or system:
<imagemap>
File:Deep monitoring well update.png|thumb|600px|Cross-section view of a partial infiltration bioretention cell with a deep monitoring well. For further details click here for [https://sustainabletechnologies.ca/app/uploads/2016/08/LID-IM-Guide-2016-1.pdf STEP's, Low Impact Development Stormwater Management Practice Inspection and Maintenance Guide (Pg. 195 - 204).] <span style="color:red">''A note: The following is an "image map", feel free to explore the image with your cursor and click on highlighted labels that appear to take you to corresponding pages on the Wiki.''</span>
rect 543 234 586 541 [[Pipes|Clean out / Access Pipe]]
rect 573 8 756 50 [[Pipes|Clean out / Access Pipe]]
rect 719 656 739 725 [[Digital technologies|Water Level Sensor]]
rect 708 552 715 686 [[Geotextiles|Geotextile Sock]]
rect 742 551 749 690 [[Geotextiles|Geotextile Sock]]
rect 705 147 754 204 [[Wells|Locked Well Cap]]
rect 890 145 1002 169 [[Wells|Locked Well Cap]]
rect 706 201 748 509 [[Wells|Solid Well Pipe]]
rect 712 554 744 687 [[Wells|Perforated Well Pipe]]
rect 335 61 800 235 [[Plant Lists|Vegetation]]
rect 219 110 337 260 [[Plant Lists|Vegetation]]
rect 541 538 590 585 [[Underdrains|Underdrain]]
rect 219 318 792 513 [[Filter Media|Filter Media]]
rect 218 510 791 551 [[Choker layer|Choker Layer (HPB)]]
rect 218 554 794 689 [[Clear Stone / Internal Water Storage (IWSZ)|Bioretention: Internal water storage]]
rect 222 260 794 317 [[Mulch|Mulch]]
rect 171 682 698 749 [[Soil groups|Native Soil]]
rect 792 405 844 749 [[Soil groups|Native Soil]]
rect 173 405 217 684 [[Soil groups|Native Soil]]
</imagemap>
<br>Many types of LID practices are designed to retain water within an internal water storage reservoir or layer (e.g. full and partial infiltration [[Bioretention|bioretention], [[Stormwater tree trench|stormwater tree trench]] and [permeable pavements|permeable pavement]] designs, infiltration trenches and chambers, and exfiltration trenches). To facilitate measurement of water level in the internal water storage reservoir or layer and periodically evaluate drainage performance over the operating life cycle of the facility, include a monitoring well located in the lowest elevation portion of the practice or system:
* Include monitoring wells in design drawings and details and install at an appropriate time during construction, or as part of repair work for facilities in need of rehabilitation.
* Include monitoring wells in design drawings and details and install at an appropriate time during construction, or as part of repair work for facilities in need of rehabilitation.
* Ensure the perforated section of the well is located within the internal water storage reservoir or layer only, and that it extends to the bottom elevation of the practice at a minimum.
* Ensure the perforated section of the well is located within the internal water storage reservoir or layer only, and that it extends to the bottom elevation of the practice at a minimum.
* A standard monitoring well casing and cap or monument to protect, secure and provide access to the well should also be included.
* A standard monitoring well casing and cap or monument to protect, secure and provide access to the well should also be included.
* Ensure there is a solid cap on the bottom of the well to provide a small water reservoir (e.g., 100 mm deep) to keep the water level sensor submerged during dry conditions. This practice also helps with checking calibration of the sensor.
* Ensure there is a solid cap on the bottom of the well to provide a small water reservoir (e.g., 100 mm deep) to keep the water level sensor submerged during dry conditions. This practice also helps with checking calibration of the sensor.
* Where possible, wells should be located in areas with little or no vehicular traffic for ease of access.
* Where possible, wells should be located in areas with little or no vehicular traffic for ease of access. <br>
</br>
===Monitoring Well Specifications===
===Monitoring Well Specifications===
</br>
{| class="wikitable"
{| class="wikitable"
|-
|-
|Well casing|| For deep wells, the well casing should be sealed at the surface to prevent surface water from flowing along the sides of the well and affecting internal storage reservoir water level readings. Bentonite clay is often used for this purpose.
|Well casing|| For deep wells, the well casing should be sealed at the surface to prevent surface water from flowing along the sides of the well and affecting internal storage reservoir water level readings. Bentonite clay is often used for this purpose.
|}
|}
<br>
==External Links==
==External Links==