Having lots of fun with the r.sim.water module. very cool stuff! Now if I can understand the outputs a little more clearly.
My input data used were in a projection defined as feet, the elevations are in feet, on a 5 foot X 5 foot grid. I recognize that the outputs are in meters (depth) and cubic meters (discharge), and that the inputs for rainfall excess (6.6mm/hr) and rainfall infiltration excess ( 0mm/hr) are in mm/hr. The 6.3 documentation/manual indicates that the input data is acceptable in feet for elevin, dxin, dyin.
At a critical downstream location, the elevation is 62 feet. The output values are (based on the input values provided above) at this location are 110 meters for depth, and 38,050 cubic meters for discharge.
Recognizing that for infiltration excess I inputted 0mm/hr needs to be greater than zero for realistic results (still have to adjust that input parameter). The discharge in volume seems intuitive (but still validating output), however, it is the depth that I do not understand. As per the manual, depth is an average and err is its RMSE.
Is the depth a relative or absolute value with regard to the elevation? Meaning should my depth be something like 3 feet (1 meter) as a theoretical result, which means at that location at the end of the event, the average depth is 3 feet of water? Or is the output in absolute elevation saying that the water depth will be at this elevation, say 65 feet elevation (62 + 3 foot depth)?
Thanks for any clarification or help!
Mark