Difference between revisions of "Notation"
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− | ;A<sub>c</sub> | + | ;A<sub>c</sub> :Area of the catchment, whole contributing drainage area (usually in m<sup>2</sup>). |
− | :Area of the catchment, whole contributing drainage area (usually in m<sup>2</sup>). | ||
− | ;A<sub>p</sub> | + | ;A<sub>p</sub> :Area of the practice e.g. footprint area of a bioretention cell (usually in m<sup>2</sup>) |
− | :Area of the practice e.g. footprint area of a bioretention cell (usually in m<sup>2</sup>) | ||
− | ;d | + | ;d :Depth e.g. of an infiltration practice (units of length, usually mm or m) |
− | :Depth e.g. of an infiltration practice (units of length, usually m) | ||
− | ;f | + | ;f :Infiltration rate (usually mm/hr) |
− | :Infiltration rate (usually mm/hr) | ||
− | ;h | + | ;h :height (units of length) |
− | :height (units of length) | ||
− | i | + | ;i :Thornthwaite monthly heat index (-) |
− | Thornthwaite | ||
− | ; | + | ;I :Thornthwaite annual heat index (-) |
− | : | ||
− | ; | + | ;L :Length, e.g. of a reach, channel or swale (usually in m) |
− | : | ||
− | ; | + | ;m :run of side slopes in channel cross sections (length, but usually expressed as a ratio in relation to rise. e.g. side slopes = 1:3, so m = 3) |
− | : | ||
− | ; | + | ;n :Manning's coefficient (unitless) Note: for clarity porosity is being expressed as 'void ratio' and sharing the notation V<sub>R</sub> |
− | : | ||
− | ; | + | ;N :Number of days in the month |
− | : | ||
− | ; | + | ;P :Perimeter of infiltration practice or swale x-section (m) |
− | : | ||
− | ; | + | ;q :Infiltration rate in (length per time, usually mm/hr) |
− | : | ||
− | ; | + | ;q':Infiltration coefficient in (length per time, usually mm/hr) after application of safety correction factor (SCF) |
− | : | ||
− | ; | + | ;Q<sub>p</sub> :Peak flow in units of volume per time (e.g. m<sup>3</sup>/s) |
− | : | ||
− | ;R<sub> | + | ;R :Ratio of catchment (A<sub>c</sub>) to the practice footprint area (A<sub>p</sub>). ''syn.'' I/P ratio. For [[green roofs]] (and often permeable paving systems) this will be 1:1. In [[bioretention]] it may be 15 or 20 to 1. |
− | |||
− | ; | + | ;R<sub>a</sub> :Existing rise of swale gradient (length, usually m) |
− | : | ||
− | ; | + | ;R<sub>b</sub> :Rise of compensation gradient for an enhanced swale (length, usually m) |
− | : | ||
− | ; | + | ;RVC<sub>T</sub> :Runoff volume control target (as outlined by MOECC, units are mm) |
− | : | ||
− | ; | + | ;S<sub>0</sub> :Longitudinal slope (m/m, i.e. dimensionless) |
− | : | ||
− | ; | + | ;S<sub>T</sub> :Storage (m<sup>3</sup>) |
− | : | ||
− | ; | + | ;S<sub>x</sub> :Cross slope (m/m, i.e. dimensionless) |
− | : | ||
− | ; | + | ;SCF :Safety correction factor (dimensionless) |
− | : | ||
− | ; | + | ;t :time (usually in hrs) |
− | : | ||
− | ;y | + | ;T :Temperature (°C) |
− | :Depth of water ( | + | |
+ | ;V :Volume (usually in m<sup>3</sup>) | ||
+ | |||
+ | ;V<sub>R</sub> :Void ratio, as usually applied to aggregates and yard materials. In this guide, it is also applied to native soils in lieu of porosity (unit for both are vol/vol, i.e. dimensionless) | ||
+ | |||
+ | ;y :Depth of water (L, usually m or sometimes mm) |
Revision as of 18:06, 26 September 2018
- Ac
- Area of the catchment, whole contributing drainage area (usually in m2).
- Ap
- Area of the practice e.g. footprint area of a bioretention cell (usually in m2)
- d
- Depth e.g. of an infiltration practice (units of length, usually mm or m)
- f
- Infiltration rate (usually mm/hr)
- h
- height (units of length)
- i
- Thornthwaite monthly heat index (-)
- I
- Thornthwaite annual heat index (-)
- L
- Length, e.g. of a reach, channel or swale (usually in m)
- m
- run of side slopes in channel cross sections (length, but usually expressed as a ratio in relation to rise. e.g. side slopes = 1:3, so m = 3)
- n
- Manning's coefficient (unitless) Note: for clarity porosity is being expressed as 'void ratio' and sharing the notation VR
- N
- Number of days in the month
- P
- Perimeter of infiltration practice or swale x-section (m)
- q
- Infiltration rate in (length per time, usually mm/hr)
- q'
- Infiltration coefficient in (length per time, usually mm/hr) after application of safety correction factor (SCF)
- Qp
- Peak flow in units of volume per time (e.g. m3/s)
- R
- Ratio of catchment (Ac) to the practice footprint area (Ap). syn. I/P ratio. For green roofs (and often permeable paving systems) this will be 1:1. In bioretention it may be 15 or 20 to 1.
- Ra
- Existing rise of swale gradient (length, usually m)
- Rb
- Rise of compensation gradient for an enhanced swale (length, usually m)
- RVCT
- Runoff volume control target (as outlined by MOECC, units are mm)
- S0
- Longitudinal slope (m/m, i.e. dimensionless)
- ST
- Storage (m3)
- Sx
- Cross slope (m/m, i.e. dimensionless)
- SCF
- Safety correction factor (dimensionless)
- t
- time (usually in hrs)
- T
- Temperature (°C)
- V
- Volume (usually in m3)
- VR
- Void ratio, as usually applied to aggregates and yard materials. In this guide, it is also applied to native soils in lieu of porosity (unit for both are vol/vol, i.e. dimensionless)
- y
- Depth of water (L, usually m or sometimes mm)