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with its rainfall input. The model gives a better fit to

the rainfall data than is given by the total monitored

data. Figure 67 shows a phase lag between rainfall and

runoff, with runoff generally peaking 1 to 4 mos after

rainfall. There is a greater lag in years with a low water

table at the beginning of the rainy season than in years

when the water table is higher.



 Water Area, Fish, and Storks Models I and II

 Model I, in which fish growth is described as a

function of the product of solar radiation and water area,

is shown with flows and storage quantified in Figure 68.

References, data, and calculations of first estimates for

rate coefficients and adjustments in coefficients made

during simulation are shown in Appendix Tables C-6 and C-7.

Model II, in which fish growth is given as a function of

solar radiation, water area, and the current standing stock

of fish, is shown with flows and storage quantified in

Figure 69. Appendix Tables C-8 and C-9 give references,

data, calculations, estimates of rate coefficients, and

adjustments in coefficients made during simulation for

Model II.

 Both models were run on the EAI Miniac analog computer

using as inputs trigonometric functions representing the

seasonal variations in solar radiation and surface water

area. Appendix Figures B-l and B-2 show plots of the

trigonometric functions and analog patching diagrams with