ANALISIS DEBIT BANJIR RENCANA PADA SEI PUTIH (STUDI KASUS)

  • TOLHAS TRI JAWANTORO LUMBAN GAOL FAKULTAS SIPIL, UNIVERSITAS HARAPAN MEDAN
  • RIZKY FRANCHITIKA FAKULTAS SIPIL, UNIVERSITAS HARAPAN MEDAN
Keywords: Flood, Nakayasu, repeat.

Abstract

Sei Putih is one of the rivers whose flow crosses the settlements of Medan City residents. Flood-prone areas in the
planning area include river estuaries, floodplains especially along Sei Putih. To protect against floods in rivers, a plan for
safeguarding against flooding can be carried out by planning buildings that aim to reduce the damage caused by
flooding to the minimum level. The control planning can be carried out well if the rainfall data at each rain station can be
known and the discharge calculated using a Synthetic Unit Hydrograph. The hydrograph method used is the Nakayasu
Synthetic Unit Hydrograph. This method aims to analyze the amount of planned rainfall that may occur in Sei Putih until
2070 and analyze the design flood discharge to evaluate the magnitude of the design flood discharge at various return
periods of 2, 5, 10, 25, 50 years. In the results of the rainfall analysis used to calculate rainfall intensity is the value of the
Pearson Log III rainfall distribution for the 10-year return period (2012-2021). From the calculation results, it is obtained
that the maximum rainfall that will occur is 620.35 mm, and the planned flood discharge for the HSS Nakayasu return
period of 2,5,10,25,50 years is 130.58 m³/d, 150,488 m³/d, 160 .48 m³/d, 168.799 m³/d, 184.56 m³/d and 171.295 m³/d.
The results of the study show that the flood discharge from year to year has increased, therefore it is necessary to
maintain or scrape the river.

References

Badan Standarisasi Nasional. 2004. Standar Nasional Indonesia (SNI). RSNI T- 02-2004. Tata Cara Perhitungan Debit
Banjir Rencana. Dewan Standarisasi Indonesia: Jakarta.
Badan Standarisasi Nasional. 2016. Standar Nasional Indonesia (SNI). SNI 2415-2016. Tata Cara Perhitungan Debit
Banjir Rencana. Dewan Standarisasi Indonesia: Jakarta
Edy Sriyono, 2012. Analisis Debit Banjir Rancangan Rehabilitasi Situ Sidomukti.Yogyakarta: Universitas Janabadra.
Edy Sriyono, 2012. Penulusuran Banjir dan Kapasitas Pelimpah Situ Lebakwangi, Bogor Jawa Barat. Yogyakarta:
Universitas Janabadra.
Haerussalam, 2005. Tinjauan Analisis Debit Banjir Pada Bendung Kalamisu Kabupaten Sinjai. Makassar: Universitas
Hasanuddin.
Kevin Alvaisha Matondang, Abu, Asep, Ganda, Yasin, Nario, 2014. Base Flow.Jakarta: STTP-PLN.
Ratna Oktavia Budiono, 2014. Estimasi Curah Hujan Maksimum Boleh Jadi Di Daerah Aliran Sungai Di Kabupaten
Situbondo Menggunakan Metode Hersfield. Jember : Universitas Jember.
Soemarto, C.D. 1999. Hidrologi Teknik, Edisi II. Jakarta: Erlangga
Soemarno, 1995. Hidrologi Aplikasi Metode Statistik Untuk Analisa Data.
Triatmodjo, Bambang, 2008. Hidrologi Terapan. Yogyakarta: Beta Offset Yogyakarta.
Vera Wim Andiese, 2012. Pengujian Metode Hidrograf Satuan Sintetik Gama I Dalam Analisis Debit Banjir Rancangan
DAS Bangga. Palu: Universitas Tadulako.
Published
2023-08-15