Description Usage Arguments Details Value Examples
Calculates cross sectional area of flow for a particular water surface elevation, ranging from empty channel to bankfull conditions.
1 |
x |
distance from horizontal datum |
b |
channel bed elevation |
WSE |
water surface elevation |
N |
spatial discretization, do not modify, except possibly for Riemann method |
method |
"trap" "riemann" or "simpson" Default is trapezoidal. |
Takes cross section info as input. calc_A_from_WSEw() is more efficient if WSE-w info is available Uses a numerical method to approximate the integral of the difference between WSE and bed elevation The numerical method only counts area where the WSE is higher than the bed elevation Needs more work to figure out how to implement arbitrary spatial discretization Need to do code testing, too. Confirmed that riemann and trap methods give similar results, but are they correct? Combine with calc_WP function/put in the same R file
A true cross sectional flow area
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