m |
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Line 5: | Line 5: | ||
<tr> | <tr> | ||
<th>Symptom</th> | <th>Symptom</th> | ||
− | < | + | <th>Possible causes</th> |
<th>Solution</th> | <th>Solution</th> | ||
</tr> | </tr> | ||
Line 11: | Line 11: | ||
<td>Standing water within the infiltration area for more than 48 hours</td> | <td>Standing water within the infiltration area for more than 48 hours</td> | ||
<td>The surface of the ponding area may become clogged with fine sediment over time. This might be because the pre-treatment is no longer working, or there are excessive sediment loads due to erosion or high sediment loads from the contributing area.</td> | <td>The surface of the ponding area may become clogged with fine sediment over time. This might be because the pre-treatment is no longer working, or there are excessive sediment loads due to erosion or high sediment loads from the contributing area.</td> | ||
− | <td>*Clean the pre-treatment area with more frequency. | + | <td> |
+ | *Clean the pre-treatment area with more frequency. | ||
*Scrape, clean or vacuum the infiltration area. A vacuum truck may be needed for sediment removal in the pre-treatment are or BMP proper. All sediments may be subjected to the MPCA’s guidance for reuse and disposal | *Scrape, clean or vacuum the infiltration area. A vacuum truck may be needed for sediment removal in the pre-treatment are or BMP proper. All sediments may be subjected to the MPCA’s guidance for reuse and disposal | ||
*Address any erosion through more plantings. | *Address any erosion through more plantings. |
Common problems and how to troubleshoot them for bioretention and infiltration practices
Link to this table
Symptom | Possible causes | Solution |
---|---|---|
Standing water within the infiltration area for more than 48 hours | The surface of the ponding area may become clogged with fine sediment over time. This might be because the pre-treatment is no longer working, or there are excessive sediment loads due to erosion or high sediment loads from the contributing area. |
|
Rainwater does not appear to flow to the infiltration area | Leaves, sediment, trash, or plant debris may be blocking the flow path. | Remove these materials on a regular basis |
Vegetation is not able to establish | Plant selection is inappropriate for the site | Consult with a landscaper or horticulturist. Check that plants are suited to the local conditions. Make sure BMP is protected from snow storage or salt application. |
Erosion or scouring around the inlet | Flow is obstructed by debris or improper grading | Correct for drainage and flow path issues to make sure flows are evenly distributed. Make sure the flow paths are unobstructed. |