Investigations were made into three methods for rapid measurement of drainage density using topographic maps and radar imagery, (l) Measurement of blue line stream symbols proves feasible but is weak due to inconsistencies. (2) The number of intersections of streams on a random line pattern overlying a map provides a good estimate of drainage density. (3) Edge-enhancement of radar images produces a measureable line pattern which appears to be strongly related to total length of streams in a basin.

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