Question

The percentage standard error of precipitation averages is often expressed functionally or graphically in terms of (i) precipitating gauge network density expressed as area per gauge, and (ii) total area of catchment. The percentage standard error

• A. increases with area per gauge as well as with total area
• B. decreases with area per gauge as well as with total area
• C. increases with area per gauge but decreases with total area
• D. decreases with area per gauge but increases with total area

Answer 1

The correct option is A increases with area per gauge as well as with total area

As the gauge network density increases (area per gauge decreases) the error of precipitation averages decreases. In other words with increase in area per gauge the standard error increases. With increase in total area of catchment, the standard error will increase.