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The Upstream Bekasi River flood covering an area of 326 ha in 15 inundation points covers five sub-districts of Bekasi City. The Upstream Bekasi River has 2 (two) tributaries, namely Cikeas River and Cileungsi River. The Upstream Bekasi River flood was caused by a relatively small cross-sectional capacity of the river, namely 391.79 m/s, while the flood discharge that occurred was relatively enormous, namely 708.75 m/s. The flood was caused by the Cikeas River at 199.47 m/s and the Cileungsi River at 509.28 m/s. In order to control floods in Upstream Bekasi River, a dry dam series is planned in Cikeas River and Cileungsi River. At Cikeas River, the Ck-227 weir was built, while at the Cileungsi River the Cl-1 weir was built. The methods used consist of data collection (rain, map of the earth; and the topography of Cikeas and Cileungsi River and the capacity of Upstream Bekasi River), determining the flood discharge design for Cikeas River and Cileungsi River, determining the location; high; the number and dimensions of the weir outlet doors, as well as the flood simulation until the Cikeas River discharge + the Cileungsi River discharge < Bekasi Hulu River discharge. Based on the results of the flood simulation, it is found that at the Cl-1 dam, with the input of the peak flood discharge of 509.28 m3/s, the peak flood output becomes 198.40 m3/s. While at the CK-227 Dam, with a peak flood discharge input of 199.47 m/s, the peak flood output is 170.40 m/s. The simulated flood discharge of Cikeas River and Cileungsi River is 368.80 m/s, smaller than the channel capacity of the Upstream Bekasi River, which is 391.79 m/s. So it can be concluded that the flood in Upstream Bekasi River can be controlled by building dry dam series in Cikeas River and Cileungsi River.

Control of Upstream Bekasi River Floods by Building a Dry Dam Series in Cikeas River and Cileungsi River, West Java