Hello,
thanks
KP
Hello Kanwarpreet,
An "In Sag" inlet captures 100% of the flow since "In Sag" inlets are generally located at depressions in the topography (Slope < 0 or negative gradient).
For both the conditions that you have specified i.e. percent capture 100% and full capture the inlet will capture the entire runoff from the catchment or the flow directed to it. See the below article for more details on inlets "In Sag";
Depth and spread calculations for grate inlet in sag
The grating information depends on how you want your inlet to function. For a catch-basin, the "width" and "length" fields inside the inlet catalog affect the structure losses hydraulically, when using the HEC-22 2nd edition headloss method. However, the structure "width" and "length" represent the dimensions of the vault where the inlet is housed. These values are only for reference and are not used in calculations. See the article below for more clarity on this;
What do the different "width" and "length" fields represent, for a catalog inlet?
Hope this helps.
Regards,
Yashodhan Joshi