Abstract :
Urban drainage is the drainage system and drainage water from an urban area that includes residential, industrial and commerce, colleges and schools, hospitals and public facilities, sports field, parking lot, installation of electrical, telecommunications and airports. Drainage design criteria include drainage capacity, channel capacity, the flow velocity in the channel, construction of channels, channel bottom slope and channel cross-section. In the planning of drainage systems is the main priority is the maximum rainfall data processing and contour to determine the dimensions of the determination of drainage channel capacity is to use a debit th R5 design rainfall of 76.16 mm and wastewater discharge residents who depend on the population. In planning this drainage system is the dimension of the results obtained varying drainage but with fixed model that is rectangular. For drainage, the largest design flow is 2.751 m3/sec runoff while the smallest is 0.040 m3/sec, the largest drainage channel dimensions are b = 1.250 m, h = 1.580 m. and b = 0250 m, h = 0250 m for the channel with the smallest dimension. Largest dimension of the building sewer is b = 1900 m, h = 1.60 m. Planning study was conducted to understand the design plan of drainage system in the City Sumenep.