Time-distribution curves vary with the watershed area. Three time distribution types have been presented here depending on the watershed size:

• point distributions (area from 0 to 10 square miles)
• intermediate distributions (area from 10 to 50 square miles)
• area average distributions (area from 50 to 400 square miles)

The curves presented here are applicable only for relatively small watersheds (area less than or equal to 400 square miles).

Related Topics:

• Rainfall Time-Distribution Information
• Rainfall Duration
• Data Sources
• Data Format
• Bulletin 70/71 Data
• Circular 173 Data