Using hydrocad version 8
For a pond with a pervious bottom I have always clicked "allow exfiltration at all elevations"
By default, hydrocad 8 sets the invert elevation to 0
It seems like newer versions of hydrocad have a different screen and when selecting "allow exfiltration at all...
Existing soil is sandy clay loam, rawls rate 0.17
A grassed infiltration basin will be placed in the area, topped with and 4" loam and seed (assume loamy sand rawls rate 2.41)
What rate do you use for drawdown? 0.17 or 2.41? I think the 0.17 but am being told otherwise
I have been told that it is a rule of thumb that the sheet flow area is reduced to approximately 1/3 area when it becomes shallow concentrated flow, therefore to sheet flow velocity should be limited to 33% downstream erosive velocity.
So if max allowable velocity of a thick grass is 6fps, I...
The norm is to have a swale on both sides of the road and crown it. What about having the road slope to one side and eliminate one swale. The stormwater from adjacent land would travel over the road before it gets to the swale, not the best idea, but for a small road with "gentle" slope, a...
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model a series of check dams as ponds
is it ok to just connect each pond together (see hydrocad model below)? my question is the tc I am using comes from the north west corner and down to the dam when the pond flows through the swale. DO i need to separate these...
