I would be very cautious using RAS for this. You may be able to get an answer, but you're breaking a major "rule" for RAS modeling in doing so. 10% is about the steepest you want to go when modeling a reach in RAS. 2V:1H is a 200% slope! Sounds like a spillway to me. Plus at slopes that steep, air entrainment, bulking of flow, cross-waves all play a major role in the ultimate water surface profile. If you're looking for accuracy here, you'd need to go with a physical model. Boundary layer theory is a method for computing the water surface profile, but at slopes that steep, I'd still be suspicious. Plus, it won't do a hydraulic jump for you. If you're jump is down on a shallower part of teh chute, you may be able to use RAS for it. But RAS will only show a jump from one cross section to the next. i.e. you won't be able to have a jump span multiple cross sections. At 0.1 m spacing, I thinnk that may be a problem for you.