1) flood_water_thickness

The flood_water_thickness is the vertical distance
between the surface of the flood water and the surface of ground,
as measured at a given point in space.
The flood_water is water that covers land 
which is normally not covered by water.

Canonical Units: m


2) flood_water_speed

Speed is the magnitude of velocity. 
The flood_water is water that covers land 
which is normally not covered by water.

Canonical Units: m.s-1


3) eastward_flood_water_velocity

A velocity is a vector quantity.
"Eastward" indicates a vector component
which is positive when directed eastward (negative westward).
The flood_water is water that covers land
which is normally not covered by water.

Canonical Units: m.s-1


4) northward_flood_water_velocity

A velocity is a vector quantity.
"Northward" indicates a vector component which is positive when directed
northward (negative southward).
The flood_water is water that covers land
which is normally not covered by water.

Canonical Units: m.s-1


5) ground_level_altitude

The ground_level_altitude is the geometric height of
the upper boundary of the solid Earth above the geoid,
which is the reference geopotentisal surface.
The geoid is similar to mean sea level.

Canonical Units: m

Rationale: the CF standard name table already has
a name ``surface_altitude'', but in this case the surface is defined as
the lower boundary of the atmosphere.
In the flood water simulation the levels do not match.


6) time_when_flood_water_rises_above_threshold

The time_when_flood_water_rises_above_threshold is the time elapsed
from the break or the overflow of levee (origin of flood water simulation)
until the flood water rises above a given threshold to a given point in space.
The threshold must be given in a coordinate variable
or a scalar coordinate variable
having the standard name "flood_water_thickness".
The flood_water is water that covers land 
which is normally not covered by water.

Canonical Units: s


7) time_of_maximum_flood_depth

The time_of_maximum_flood_depth is the time elapsed
from the break or the overflow of levee (origin of flood water simulation)
until the time when the flood water thickness reaches to the maximum 
during the simulation for a given point in space.
The threshold must be given in a coordinate variable
or a scalar coordinate variable
having the standard name "flood_water_thickness".
The flood_water is water that covers land
which is normally not covered by water.

Canonical Units: s


8) time_when_flood_water_falls_below_threshold

The time_when_flood_water_falls_below_threshold is the time elapsed
from the break or the overflow of levee (origin of flood water simulation)
until the time when the flood water falls below
a given threshold for a given point in space. 
The threshold must be given in a coordinate variable
or a scalar coordinate variable
having the standard name "flood_water_thickness".
The flood_water is water that covers land
which is normally not covered by water.

Canonical Units: s


9) time_duration_with_flood_water_above_threshold

The time_duration_with_flood_water_above_threshold is the time elapsed
from the time when the flood water firstly rises above a given threshold
until the time when the flood water finally falls below the threshold
for a given point in space. 
The threshold must be given in a coordinate variable
or a scalar coordinate variable
having the standard name "flood_water_thickness".
The flood_water is water that covers land
which is normally not covered by water.

Canonical Units: s