Hydrological Network Design

Type of Region Measurement Variable
Density for Minimum Network Tolerable Density in Difficult Conditions
Flat regions of temperate Mediterranean and tropical zones. 1000-2500 3000-10000
Mountainous regions of temperate, Mediterranean and tropical zones. 300-1000 1000-5000
Small mountainous islands with very irregular precipitations very dense hydrographic network. 140-300 -
Arid and polar zones 5000-20000 -

The detailed Network Design criteria and guidelines are available in the Network Design Manual [Weblink / PDF]