Abstract
Structurally, the drainage in Buin Pandan Hamlet is generally masonry in cement, but due to poor planning, the water flowing on the road and also the planned drainage channel is not in accordance with the water discharge so that water overflows from the drainage channel, which is in Dusun Buin. Pandan, aims to determine whether the current condition of the drainage system is appropriate. After the research has been done, it is known that the value of Cv = 0.485, the value of C_s = 0.026 and C_k = 3.973, it can be concluded that in planning this drainage system the type III log method is used and the rainfall intensity is 0.229 mm/hour in Buin Pandan Hamlet. Then a calculation is carried out with the aim of knowing whether Qr < Qs or Qr > Qs in the drainage in Buin Pandan Hamlet and it is known that the difference between Qr = 5.46 (m^3/s) and Qs = 0.60 (m^3/s) is in the drainage. With steps that can be taken to prevent flooding, namely by re-planning the drainage channel. From the results of the re-planning of the drainage channel, the value of the channel capacity Qs is 5.86 (m^3/s) and the size of the channel that can accommodate water discharge is 1 m wide and 1.60 m high. Channels planned for the same channel, namely open rectangular channels, only have different dimensions.
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