The effect of gauge height, exposure and screening on systematic errors in rainfall estimation is investigated. Adhesion losses are found to be more than 2% of the annual precipitation, but for summer periods alone it can amount to over 5%. A statistical model using the square root of observations (corrected for adhesion) is found to be adequate to describe differences due to the aerodynamic effects. A correction formula is proposed.
- Received March 8, 1978.
- © IWA Publishing 1978