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]