RAINFALL 100% 



EVAPOTRANSPIRATION 75% 



SURFACE RUNOFF 1 1% 



LAKE LEVEL 



♦6.0 NGVD 



♦2.0 NGVD 



0.0 NGVD 



-4.5 NGVD 



FIGURE 1 

 THE LAND SURFACE WATER BUDGET 



248 



