Drainage Channel Planning to Reduce Road Surface Runoff

Abstract

The road in Tapinalu - Ulatu hamlet is a road located in Luhu village. This road section connects the hamlets of Huamual behind. There are several points that already have drainage channels, while most points do not have drainage channels. This becomes a problem, over time there is a puddle of water on the road during high rainfall, it will be a factor that affects the road structure. The efforts made are by planning drainage channels. The research method used is the data collection and analysis method. The types of data in this study are primary and secondary data, then analyzed using the Log Person III method based on hydrological analysis and hydraulic analysis and planning based on the amount of existing channel discharge. Based on the calculation results for a 10-year return period, the planned rainfall is 326.587 mm, with a population growth percentage of 0.04% per year so that the population of Ulatu Hamlet in 2029 is 1,629 people. From the analysis results, the amount of runoff discharge (Qr) entering the drainage channel of the Tapinalu – Ulatu Hamlet Road Section is 0.089 m3/second, and the drainage channel discharge (Qs) is 1.486 m3/second. From the results of the channel dimension planning, the upper width is 58 cm, the base width of the channel is 40 cm, and the height of the channel is 74 cm.