vdamheightngi {viadam} | R Documentation |
Computes vertical dam height from dam height normal to the terrain, deflecting angle, slope of the terrain, and the angle of the dam side with respect to the terrain.
vdamheightngi(phi,psi,alfa,h)
phi |
deflecting angle with respect to the direction of steepest decent in a sloping coordinate system aligned with the terrain. |
psi |
the slope of the terrain. |
alfa |
the angle of the dam side with respect to the sloping terrain in the direction normal to the dam axis in a plane normal to the upstream terrain. |
h |
dam height normal to the terrain. |
vdamheightngi
returns a vector of vertical dam heights
with the same number of elements as phi
, psi
,
alfa
or h
.
The vertical dam height is measured in a vertical cross section normal to the dam or obstacle axis in the map plane.
The angles phi
, psi
and alfa
are given in radians.
This function is equivalent to the function vdamheight
but uses a different mathematical expression (from NGI reports)
to compute the vertical damheight. It is only defined for validation purposes.
Tomas Johannesson
## Not run: vdamheightngi(25*pi/180,10*pi/180,40*pi/180,15) ## End(Not run)