1. A small catchment of area 150 ha received a rainfall of 10.5 cm in 90 minutes due to a storm. At the outlet of the catchment, the stream draining the catchment was dry before the storm and experienced a runoff lasting for 10 hours with an average discharge value of 2.0 m3/s. The stream was again dry after the runoff event. (a) What is the amount of water which was not available to runoff due to combined effects of infiltration, evaporation and transpiration? (b) What is the ratio of runoff to precipitation?
