The purpose of this research is to develop a synthetic unit hydrograph model to determine the most suitable model for predicting peak discharge in the Air Bengkulu Watershed. Rainfall data were obtained from the Bengkulu Province Meteorology, Climatology, Geophysics Agency, from 2000 to 2019 year. The Synthetic Unit Hydrograph (SUH) method used to estimate the discharge in the Air Bengkulu River Watershed is the synthetic unit hydrograph, namely Snyder, ITB-1 and ITB-2, in addition to that also used HEC-HMS software. The estimation results of peak discharge and peak time for each type of hydrograph in the Air Bengkulu watershed are: Peak Discharge of Snyder 1,302.76 m³ / s with Peak Time 6,596 hours, Peak Discharge of ITB-1 2,395.50 m³ / s with Peak Time of 4,705 hours, Peak Discharge of ITB-2 2,165.857 m³ / s with Peak Time of 6,341 hours. It can be concluded that the synthetic unit hydrograph has been able to estimate the peak discharge based on the time sequence of a rain event, so there is a relationship between peak time and peak discharge. The peak and peak times obtained from the output of each method are different, so more in-depth research is needed if this model is to be used as a basis for decision making.

本研究的目的是开发一个合成单位水文过程线模型，以确定最适合预测 Air Bengkulu 流域峰值流量的模型。降雨数据来自明古鲁省气象、气候、地球物理局，从 2000 年到 2019 年。用于估算空气明古鲁河流域流量的合成单位水位线（SUH）方法是合成单位水位线，即 Snyder、ITB-1 和 ITB-2，此外还使用了 HEC-HMS 软件。Air Bengkulu 流域内各类水文过程线的峰值流量和峰值时间估算结果为：Snyder 峰值流量 1,302.76 m ³ / s，峰值时间 6,596 小时，ITB-1 峰值流量 2,395.50 m ³/s，峰值时间为 4,705 小时，ITB-2 的峰值放电为 2,165.857 m ³ / s，峰值时间为 6,341 小时。可以得出结论，合成单位水文过程线已经能够根据降雨事件的时间顺序来估计峰值流量，因此峰值时间与峰值流量之间存在关系。每种方法的输出得到的峰值和峰值时间是不同的，所以如果要用这个模型作为决策依据，还需要更深入的研究。