Perbandingan Hidrograf Satuan Amatan Dan Hidrograf Satuan Sintesis (Das Maros Sub Das Maros Tompubulu)

Agusalim, M.; Nanda, Abd. Rakhim; Praja, Soemitro Emin; Syah, Erwin

doi:10.26618/th.v11i1.2435

Cited by 2 publications

(3 citation statements)

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“…The beginning of this calculation is to make the measured hydrograph a percentage hydrograph, then determine the initial estimated unit hydrograph of 10 m 3 /s/mm. After that, recalculate the initial estimated hydrograph Wgh [4]. From the calculation graph of the Collins Method Unit Hydrograph, it is obtained that the peak (Qp) at the 19th hour is 1.895 m 3 /s.…”

Section: B Collins Methodsmentioning

confidence: 99%

“…The calculation of the decrease in the Measured Unit Hydrograph in this research uses 2 methods, namely [4][7]:…”

Section: Decrease In Measured Unit Hydrographmentioning

confidence: 99%

“…Peak Discharge (Qp) Snyder Unit Hydrograph at 21.16 hours = 4.728 m 3 /s.mm, while the Collins Unit Hydrograph at 19 hours = 1.589 m 3 /s.mm. So based on this, the Snyder Unit Hydrograph with a Peak Coefficient (Cp) = 0,5, Time Coefficient (Ct) = 1,7 and shape coefficient (CW75 = 1.22 and CW50 = 2.14) is not in accordance with the characteristics of the Cidurian Watershed[14].In calculating the Snyder Synthetic Unit Hydrograph after calibration, we can first calculate qpR from the peak of Collins = 1.59 m 2 /s/mm = 0.024 m 2 /s.km2.cm, with the Coefficient of Time (Ct) Coefficient of Peak (Cp) calculated by equations, namely 0.59 and 0.09, respectively, tp = 46.47 hours, qp = 0.038 m 3 /s.km2.cm, tr = 1.19 hours, tpR = 10.5 hours, tp = 6.55 hours, tb = 233.93 hours, W75% = 14.19 hours, and W50% = 25.54 hours[4].…”

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confidence: 99%

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Prediction of Snyder Synthetic Unit Hydrograph Coefficient for Cidurian Watershed

Zulfa,

Purnaditya,

Wigati

et al. 2023

fondasi

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Watershed management is starting with knowing and recording the problems that exist in the watershed. Condition of the watershed that continues to deteriorate can trigger natural disasters such as flash floods that occurred in the Cidurian Watershed. Hydrological design, especially for short-term phenomena runs generates the synthetic unit hydrograph. Snyder synthetic unit hydrograph is the common synthetic hydrograph that widely used on hydrological analysis. Generally, on the snyder synthetic unit hydrograph, the coefficient value (peak coefficient, time coefficient, CW75 and CW50) is only based on estimates or previous research so that the calculation of discharge is less accurate and needs further research. This study discusses the prediction of the value of the Peak Coefficient (Cp), Time Coefficient (Ct), CW75 and CW50 in the Cidurian Watershed using the Snyder Synthetic Unit Hydrograph (HSS) and get a calculation graph between the Polynomial and Collins Unit Hydrographs against the Snyder Synthetic Unit Hydrograph (HSS) in the Cidurian Watershed with rainfall data processing using the Thiessen Polygon, Mononobe, and Alternating Block Method (ABM). The results showed that the value of Peak Coefficient (Cp) = 0.59, Coefficient of Time (Ct) = 0.09, CW75 = 1.22, CW50 = 2.14, with Peak Discharge (Qp) Collins Measured Unit Hydrograph 19th hour = 1.589 m 3 /s, and Peak Discharge (Qp) Snyder Synthetic Unit Hydrograph 11th hour, 1 = 1.59 m 3 /s.

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Section: B Collins Methodsmentioning

confidence: 99%

“…The calculation of the decrease in the Measured Unit Hydrograph in this research uses 2 methods, namely [4][7]:…”

Section: Decrease In Measured Unit Hydrographmentioning

confidence: 99%

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confidence: 99%

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