![The total rainfall in a catchment of area 1000 km2, during a 6 h storm is 19 cm The surface runoff due](https://www.gkseries.com/blog/wp-content/uploads/2023/09/The-total-rainfall-in-a-catchment-of-area-1000-km2-during-a-6-h-storm-is-19-cm-The-surface-runoff-due-.jpg)
Q. The total rainfall in a catchment of area 1000 km2, during a 6 h storm, is 19 cm. The surface runoff due to this storm computed from triangular direct runoff hydrograph is 1×108 m3. The Φindex for this storm (in cm/h, up to one decimal place) is
Ans: 1.5
Sol:
![](https://www.gkseries.com/blog/wp-content/uploads/2023/09/image-80.png)