Perencanaan Dinding Penahan (Parafet) Untuk Mengatasi Banjir Di Way Batu Merah Desa Batumerah Kecamatan Sirimau Kota Ambon

Batu Merah Village is experiencing flooding due to overflowing rivers which are unable to accommodate the flow of water. With this problem, the writer takes the river normalization research as a reference for the Ambon city government, considering that Batu Merah river needs to be considered as it should be so that urban planning becomes safe and comfortable for all parties. The purpose of writing this research is to be able to find out how much the design discharge for Q25 years, how the results of the analysis of the water level profile Q25 years, and how the dimensions of the retaining wall are planned to withstand flooding. After analyzing the results found for the flood plan Q25 years is 79.668 m / sec with water level profiles there are 9 river points in the downstream unable to contain Qrencana namely STA STA 0 + 600, STA 0 + 700, STA, STA 0 + 800, STA 0 + 900, STA 1 + 000, STA 1 + 100, STA 1 + 200, STA 1 + 300 STA 1 + 400 and the dimensions to be analyzed refer to the highest water level profile point which is 0 + 600 with the result of b = 2 , 70 h = 3.50 results of the dimension design have been safe against rolling, sliding, carrying capacity of the soil, and erosion. Normalization efficiency needs to be done to withstand flooding so as not to overflow