Problem #4. A 900ft long swale needs to convey water from the northern end of a property to the southern end where an outlet control structure (culvert) will divert water into a detention facility. The elevation at the upstream end of the swale is 528 ft and the downstream end is 519 ft. The site has silty loam soils and a seasonally high groundwater level of 513 ft. Design a stormwater conveyance swale, using HEC-RAS or hand computation, for this site that will properly convey the following discharges - two-year storm (8.1 cfs) and a ten-year storm (13 cfs). {Answer this question as a one-page memo to a client along with basic engineering computations supporting your suggestion. Problem #4. A 900ft long swale needs to convey water from the northern end of a property to the southern end where an outlet control structure (culvert) will divert water into a detention facility. The elevation at the upstream end of the swale is 528 ft and the downstream end is 519 ft. The site has silty loam soils and a seasonally high groundwater level of 513 ft. Design a stormwater conveyance swale, using HEC-RAS or hand computation, for this site that will properly convey the following discharges - two-year storm (8.1 cfs) and a ten-year storm (13 cfs). {Answer this question as a one-page memo to a client along with basic engineering computations supporting your suggestion