Normal Spillway

Contains all data for normal, non-erodible spillway.

Spillway Length

Effective spillway length (metres). Calculated spillway flows are then added to normal outlet level/discharge co-ordinate flows.

Multiplication Factor

Discharge values entered in the coordinates dialog will be multiplied by the value entered in this item.

Use Coordinates

If this option is selected Rafts expects the normal spillway to be described by way of level/discharge co-ordinates. Zero level in this case starts from the weir still level. Discharges are in m^3/s. 

Spillway Rating Curve

US Water Level. level of water surface immediately upstream of spillway.

Discharge. Discharge in m3/s over spillway corresponding to US Water Level.