1. 2) Kusuda, T., Arao, S. and Moriyama, K.:Energy Losses at Junctions and Transient Flow in Sewer Networks, Proc. 6th Int. Conf. Urban Storm Drainage, Vol.1, pp.122-127, 1993.
2. 3) Arao, S. and Kusuda, T.:Energy Losses at Circular Drop Manholes, Proceedings of the 7th ICUSD, Hanover Germany, Vol.1, pp.85-90,1996.
3. 4) Yen, B. C.:Hydraulics of Sewers, Advances in Hydrosciences, Academic Press, Orland, Florida, Vol.14, pp.1-122, 1986.
4. 5) Larry, W. Mays:STORMWATER COLLECTION SYSTEMS DESIGHN HANDBOOK, McGraw-Hill, pp.6.65-6.84, 2001.