Abstract
Adequate infiltration through Permeable Interlocking Concrete Pavements (PICPs) is critical to their hydraulic and stormwater treatment performance. Infiltration is affected by clogging caused by the trapping of fines in the PICP surface, which, over time, reduces treatment performance. Clogging can be reduced by periodic maintenance such as vacuum sweeping and/or pressure washing. Maintenance requirements can be indicated by measuring reduced infiltration rates. This paper compared infiltration results using the standard test (C1781M-14a) with the results of a new stormwater infiltration field test (SWIFT) developed in Australia to evaluate the maintenance requirements of PICPs. A strong correlation (Pearson’s r = −0.714) was found between results using the two methods. This study found that the SWIFT was a reliable method for estimating the degree of clogging of PICPs while successfully overcoming some of the problems with the more technical existing test methodology such as horizontal water leakage (use of sealant), unrealistic pressure heads, speed of test, and portability. The SWIFT test is a simple, fast and inexpensive way for asset managers and local government employees to quickly assess the maintenance requirements of PICP installations in the field.
Highlights
Permeable pavement systems have been used globally for over two decades as a Water SensitiveUrban Design (WSUD) control measure to reduce both peak stormwater flows and pollution loads [1,2,3,4].Water SensitiveUrban Design (WSUD) is of a similar design philosophy to Low Impact Development (LID) in the US, and SustainableUrban Drainage Systems (SUDS) in Europe
This paper presents results from a comparison between the standard methodology [21], and a new Permeable Interlocking Concrete Pavements (PICPs) field infiltration test methodology developed at the University of the Sunshine Coast in Australia
Measurement of infiltration rates of PICPs has previously been problematic for a variety of reasons, including the practical difficulties in applying existing test methodologies, access to the specialised equipment required for testing, and the time taken to undertake each test
Summary
Permeable pavement systems have been used globally for over two decades as a Water SensitiveUrban Design (WSUD) control measure to reduce both peak stormwater flows and pollution loads [1,2,3,4].WSUD is of a similar design philosophy to Low Impact Development (LID) in the US, and SustainableUrban Drainage Systems (SUDS) in Europe. Permeable pavement systems have been used globally for over two decades as a Water Sensitive. Urban Design (WSUD) control measure to reduce both peak stormwater flows and pollution loads [1,2,3,4]. Permeable pavements significantly reduce stormwater runoff volumes compared to conventionally constructed pavements. They support increased evaporation which aids in further reducing runoff and peak stormwater flows. They filter the stormwater within the pavement structure removing pollutants and improving water quality [1,3,5]. Stormwater treatment mainly takes place through the trapping of suspended solids during infiltration through the pavement structure [6,7,8]
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