Analisa Hidrologi dan Hidrolika pada Saluran Drainase Tanjung Piayu Menggunakan Program Hec-ras

Setyaki, Arya (2020) Analisa Hidrologi dan Hidrolika pada Saluran Drainase Tanjung Piayu Menggunakan Program Hec-ras. Undergraduate thesis, Universitas Internasional Batam.

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Abstract

Pada Provinsi Kepulauan Riau, Kota Batam sering terjadi banjir atau genangan air tinggi. Salah satunya terletak pada daerah Tanjung Piayu, Kecamatan Sei Beduk sehingga pemerintah pusat membangun drainase induk yang berlokasi di Tanjung Piayu untuk mencegah terjadinya banjir yang sering terjadi. Pembangunan drainase induk di Tanjung Piayu dikerjakan oleh Badan Wilayah Sungai (BWS) Sumatera IV yang dilaksanakan dari tahun 2017 hingga 2019 akhir. Drainase Tanjung Piayu di analisa dengan analisa hidrologi dan analisa hidrolika dibantu oleh program HEC-RAS. Analisa hidrologi dengan menggunakan Metode Rasional dan Metode HSS-Nakayasu, berdasarkan rumus Metode Rasional dan Metode HSS-Nakayasu diproses debit banjir maksimum terbesar dengan menggunakan Metode Rasional dengan hasil Periode ulang 2 tahun 33.898 m3/detik, 5 tahun 48.923 m3/detik, dan 10 tahun 61.189 m3/detik. Dari hasil analisa hidrologi lalu dilanjutkan dengan analisa hidrolika menggunakan program HEC-RAS dan data debit banjir maksimum Metode Rasional. Berdasarkan hasil program analisa HEC-RAS dapat diketahui bahwa tidak terjadi luapan air di saluran drainase Tanjung Piayu dengan periode ulang 2 tahun, 5 tahun, dan 10 tahun. ********************************************************************** Riau Islands Province, Batam City often experience floods or high puddles. One of the locations most prone to it is located in the area of Tanjung Piayu, Seibeduk District to the point that the central government built a main drainage located in Tanjung Piayu to prevent frequent flooding. The construction of the main drainage in Tanjung Piayu was undertaken by the Sumatra IV River Region Agency (BWS) which was carried out from the end of 2017 to 2019. Drainage of Tanjung Piayu is analyzed by hydrological analysis and hydraulics analysis assisted by the HEC-RAS program. Hydrological analysis employed the Rational Method and the HSS-Nakayasu Method. Based on the formula of the Rational Method and the HSS-Nakayasu Method, the largest maximum flood discharge using the Rational Method with the results of a 2 year return period 33,898 m3 / second, 5 years 48,923 m3 / second, and 10 years 61,189 m3 / second. The results of the hydrological analysis is then followed up with the hydraulic analysis using the HEC-RAS program and the maximum flood discharge data of the Rational Method. Based on the results of the HEC-RAS analysis program it can be seen that there is no overflow of water in the Tanjung Piayu drainage channel with a return period of 2 years, 5 years, and 10 years.

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