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[[File:Data logger wells.PNG|thumb|500px|Diagram of a typical water level logger installation in an infiltration BMP sub-surface water storage reservoir monitoring well (City of Philadelphia, 2014)<ref name="example4" />.]]
→Continuous Monitoring
===External guidance on monitoring the performance of stormwater BMPs===
===External guidance on monitoring the performance of stormwater BMPs===
[[File:Data logger wells.PNG|thumb|500px|Diagram of a typical water level logger installation in an infiltration BMP sub-surface water storage reservoir monitoring well (City of Philadelphia, 2014)<ref name="example4" />.]]
*[https://link.springer.com/book/10.1007/978-1-4614-4624-8 Optimizing Stormwater Treatment Practices: A Handbook of Assessment and Maintenance] (Erickson et al., 2013)<ref name="example3" />;
*[https://link.springer.com/book/10.1007/978-1-4614-4624-8 Optimizing Stormwater Treatment Practices: A Handbook of Assessment and Maintenance] (Erickson et al., 2013)<ref name="example3" />;
It is recommended that at a minimum, the drainage performance of stormwater infiltration BMPs be evaluated as part of Assumption and Verification inspections. Drainage performance, or the ability of the BMP to fully drain runoff from a certain size storm event within a certain time period, can be evaluated by continuous monitoring during natural or simulated storm events. When a water source of sufficient size to fill the sub-surface water storage reservoir is available, it is recommended that drainage performance evaluations be performed by simulated storm event testing as results can be produced within a much shorter time period (e.g., within a week) as opposed to natural storm event testing, which can require field monitoring activities over 6 months to 2 years in duration.
It is recommended that at a minimum, the drainage performance of stormwater infiltration BMPs be evaluated as part of Assumption and Verification inspections. Drainage performance, or the ability of the BMP to fully drain runoff from a certain size storm event within a certain time period, can be evaluated by continuous monitoring during natural or simulated storm events. When a water source of sufficient size to fill the sub-surface water storage reservoir is available, it is recommended that drainage performance evaluations be performed by simulated storm event testing as results can be produced within a much shorter time period (e.g., within a week) as opposed to natural storm event testing, which can require field monitoring activities over 6 months to 2 years in duration.
The general approach involves installing water level logger sensors (i.e., pressure transducers) in:
The general approach involves installing water level logger sensors (i.e., pressure transducers) in: