Instructions: Draw the dam boundary, then draw the surrounding catchment boundary to calculate the respective areas.
Dam boundary is the estimated boundary when 100% full.
Note:
Drawn dam boundaries must be approximately circular or square shapes, complex shapes are not supported by the water balance model.
Modelled shape types include Spherical Cap, Ring Tank, and Truncated Pyramid.
Instructions:
Select the profile that most closely matches the shape of your dam walls.
Estimate the dimensions of the dam as accurately as possible to determine the maximum volume.
Select a dam profile
r = radius of dam when full H = maximum depth when full h = current (or actual) water depth
Dimension estimates:
m
m
m
Auto calculated variables
Dam area:
m2
Catchment area:
m2
Maximum volume when full:
m3
Step 3: Climate Estimates
Instructions: The monthly rainfall and evaporation range for the selected dam location has been estimated from the previous 20 years of
SILO weather data.
Auto calculated variables
m2
m2
m3
The rating curve chart shows the volume of the dam in relation to vertical water level.
The water balance forecasts chart shows the predicted water level and volume for various climate scenarios from the starting water level.