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 Heat Index (-)
 
  
;L
+
;I :Thornthwaite annual heat index (-)
:Length, e.g. of a reach, channel or swale (usually in m)
 
  
;m
+
;L :Length, e.g. of a reach, channel or swale (usually in 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
+
;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)
:Manning's coefficient (unitless) Note: for clarity porosity is being expressed as 'void ratio' and sharing the notation V<sub>R</sub>
 
  
;P
+
;n :Manning's coefficient (unitless) Note: for clarity porosity is being expressed as 'void ratio' and sharing the notation V<sub>R</sub>
:Perimeter of infiltration practice or swale x-section (m)
 
  
;q
+
;N :Number of days in the month
:Infiltration rate in (length per time, usually mm/hr)
 
  
;q'
+
;P :Perimeter of infiltration practice or swale x-section (m)
:Infiltration coefficient in (length per time, usually mm/hr) after application of safety correction factor (SCF)
 
  
;Q<sub>p</sub>
+
;q :Infiltration rate in (length per time, usually mm/hr)
:Peak flow in units of volume per time (e.g. m<sup>3</sup>/s)
 
  
;R
+
;q':Infiltration coefficient in (length per time, usually mm/hr) after application of safety correction factor (SCF)
: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>  
+
;Q<sub>p</sub> :Peak flow in units of volume per time (e.g. m<sup>3</sup>/s)
:Existing rise of swale gradient (length, usually m)
 
  
;R<sub>b</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. 
:Rise of compensation gradient for an enhanced swale (length, usually m)
 
  
;RVC<sub>T</sub>
+
;R<sub>a</sub> :Existing rise of swale gradient (length, usually m)
:Runoff volume control target (as outlined by MOECC, units are mm)
 
  
;S<sub>0</sub>
+
;R<sub>b</sub> :Rise of compensation gradient for an enhanced swale (length, usually m)
:Longitudinal slope (m/m, i.e. dimensionless)
 
  
;S<sub>x</sub>
+
;RVC<sub>T</sub> :Runoff volume control target (as outlined by MOECC, units are mm)
:Cross slope (m/m, i.e. dimensionless)
 
  
;SCF
+
;S<sub>0</sub> :Longitudinal slope (m/m, i.e. dimensionless)
:Safety correction factor (dimensionless)
 
  
;t
+
;S<sub>T</sub> :Storage (m<sup>3</sup>)
:time (usually in hrs)
 
  
;T
+
;S<sub>x</sub> :Cross slope (m/m, i.e. dimensionless)
:Temperature (°C)
 
  
;V
+
;SCF :Safety correction factor (dimensionless)
:Volume (usually in m<sup>3</sup>)
 
  
;V<sub>R</sub>
+
;t :time (usually in hrs)
: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
+
;T :Temperature (°C)
:Depth of water (length, usually m or sometimes mm)
+
 
 +
;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)