Data inputs.

Clearly equation 2 requires substantial data inputs before it can be numerically solved.

The lake model program accepts the following inputs...

Depth flows

Depth flows are typically...

• Rainfall.
• Evaporation.

Volume flows

Typical volume flows are...

• River flows.
• Ground water flows.
• Sea water flow through estuary.

Note that river and ground water flows are time dependent, the estuary flows are lake level dependent.

Cell areas

These can be input into the model as interpolated functions of lake level or as constants.

Channel cross-sections

The channel cross-sections can be modeled as constant values or as interpolated functions of lake level.

Relaxation times

are treated as a fitted parameter.

Time series data and functions are entered as a file of x y points, values at intermediate positions are linearly interpolated from neighbouring points.