HEC HMS

Question

FOR CATCHMENT LIKE THIS (GIVE IN FIGURE). I AM INTERESTED TO FIND RUNOFF. WHILE I HAVE DAILY RAINFALL DATA OF ONE GAUGE.WHICH IS INSTALLED NEAR THE OUTLET. CAN I RUN HEC HMS MODEL LIKE IN THE FIGHURE(SEPARATE BASINS). OR RUN IT AS ONE BASIN NOT DISTRIBUTE IT INTO SUB BASINS?
does HEc hms this like capability to run sub basin on one gauge data?

Vít Rous · Answer

HEC HMS has such a capability. You can add a gauge to every subbasin separately, and of course, it can be the same rain gauge. The obvious problem with this approach is that the rainfall data may not represent the real situation sufficiently (especially for large watersheds). And that is true for both models of the catchment (one basin vs. subbasins). But the division of the catchment into the subbasins is still a better approach here because it can represent physical characteristics better (different runoff characteristics - ex. different CN curves, slope, etc.).

Ajit Seshadri Seshadri · Answer

Hi. Sultan. Treat it like a Water shed.. Water in & wter out.. gradient at region.. any inflow from upstream areas.. space.. is it permeable or not.. with greens or allowing free flow like a tiled floor .. now take up the rain fall in mm.. cater to maxm.. give a f o s ..ie factor of safety .. then apply naturistiv
C principles & practices.. well wishes from Prof Ajit Seshadri. India ..

Abdelmula Abdalla · Answer

Yes I does. All you need is to tick the option calculate Q at junction. By then you will have the Q for each basin.
 
Daily rainfall should be correctly entered and are the same for all sub-basin. Take Vincent note as well

Vincent Cloarec · Answer

Hello,
If you think you can modelise the reach, i think it is a good idea to discretise the watershed. But only if you think the reach model is good enought. You have to get some good informations about the shape and the slope of the reach. If not, it is preferable to modelise the entire watershed.

HEC HMS

Media

Taxonomy