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1.9. In a given year, a watershed with an area of 2500 km² received 130 cm of

precipitation. The average rate of flow measured in a gage at the outlet of the

watershed was 30 m³/sec. Estimate the water losses due to the combined effects

of evaporation, transpiration, and infiltration due to ground water. How much

runoff reached the river for the year (in cm)?

Fig: 1