Q: What is the formula for drainage density?

How do you calculate lag time in a hydrograph?

How do you calculate the gradient (slope) of a river or hill?

What is the formula for annual temperature range?

: How do you find the mean monthly temperature?

How do you find total annual rainfall?

What is the formula for population density?

How do you calculate natural population change?

What is the formula for population growth rate (%)?

How do you calculate the mean (average) of a dataset?