Responses to comments

31 August 2018

Take a look a this address : https://stormwater.extension.oregonstate.edu/standard-details There's plenty interesting plans with notes to see how to make important changes to the plans following the field reality!

• Thanks for the reference. GreenGirl subscribes to the same share-and-share alike Creative Commons licensing as we do. We have her website and a few similar resources linked on our Drawings page.

25 July 2018

Do the units check out for calculating the total depth of the stone reservoir? (i.e. should f' be in units of m/hr instead of m/day?)

• The notation used in the equations on Permeable paving: Sizing is being brought into line with the other sections of the site. At this time time units have also been brought into line to millimeters and hours as used for the other BMPs.

24 April 2018

A general feedback from a french user - I do not know the meaning of the acronym LID, used profusely in this article, making it hard to understand. I think it would be very helpful to have a definition for all the acronyms by hovering the mouse cursor over them, just like you did in the sixth paragraph of "Targeting hard surfaces" with the definition of "Rainwater harvesting". This type of definition should be available for all the acronyms used in every other pages of this wiki, at least once per acronym per page.

• 'LID' has been added to the terms using the same definition for 'Low Impact Development'. We will continue to look for missing information of this type.

10 April 2018

Do you have any specs for designing berms around a bioretention pond?

• Please see Berms

23 March 2018

Is it possible to get the the planting list updated to include native species?

• Certainly! This information will be added as we review the plant tables in summer 2018.

21 March 2018

Is there a reliable set of estimated design infiltration rates for sites where only soil type is currently known? Additional tests will be conducted, but for now we are looking for numbers to begin an estimate, and a reasonable basis for those numbers.

• The curators of Minnesota's stormwater wiki have conducted a very thorough literature review to establish their suggested values for design infiltration rates. The lowest value on their table for clayey soils is 15 mm/hr, we believe that this is a reasonable estimate for clay soils. Designers may wish to add a safety correction to this number before undertaking their design calculations.

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An underlying bed filled with aggregate or other void-forming fill material that temporarily stores stormwater before infiltrating into the native soil or being conveyed by an underdrain pipe.

Low Impact Development. A stormwater management strategy that seeks to mitigate the impacts of increased urban runoff and stormwater pollution by managing it as close to its source as possible. It comprises a set of site design approaches and small scale stormwater management practices that promote the use of natural systems for infiltration and evapotranspiration, and rainwater harvesting.

The practice of intercepting, conveying and storing rainwater for future use. Captured rainwater is typically used for outdoor non-potable water uses such as irrigation, or in the building to flush toilets.

Low impact development is a stormwater management and land development strategy applied at the parcel and subdivision scale that emphasizes conservation and use of on-site natural features integrated with engineered, small scale hydrologic controls to more closely mimic pre-development hydrologic functions.

A stormwater management strategy that seeks to mitigate the impacts of increased urban runoff and stormwater pollution by managing it as close to its source as possible. It comprises a set of site design approaches and small scale stormwater management practices that promote the use of natural systems for infiltration and evapotranspiration, and rainwater harvesting.

A shallow excavated surface depression containing prepared filter media, mulch, and planted with selected vegetation.

A body of water smaller than a lake, often artificially formed.

1. A mineral soil separate consisting of particles less than 0.002 millimeter in equivalent diameter. 2. A soil texture class. 3. (Engineering) A fine-grained soil (more than 50 percent passing the No. 200 Sieve) that has a high plasticity index in relation to the liquid limit. (Unified Soil Classification System).