| Summary: | The availability of water in the Omu watershed becomes an important factor for residents in carrying out their activities, very it is important to know the available discharge and water requirements. This study aims to determine the amount of water availability in the Omu watershed based on the method FJ. MOCK, NRECA, and SMEC. This research uses average monthly rainfall data of Tuva station, average monthly climatology data of Bora station, data of catchment area, and land use. The result of the calculation of Omu watershed water availability by using the method of FJ. MOCK, NRECA, and SMEC; obtained the average discharge 2. 21 m3/sec, 2. 30 m3/sec, 2. 85 m3/sec, the maximum discharge happened in June 2. 36 m3/sec, in March 3. 63 m3/sec, in June 3. 58 m3/sec, and while the minimum discharge happened in July 1. 72 m3/sec, in January 0. 84 m3/sec, in February 2. 12 m3/sec. The result of instantaneous discharge measurement in the field is 2. 18 m3/sec. Based on the comparison of the results of the analysis of the water availability data on the Omu watershed, from the three methods closest to the instantaneous discharge value is the FJ. MOCK method.
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