256 - 
SUSPENDED SOLIDS 
A = Devils Lake, Clear Oliotrophic Lake 
B = Lakes Mendota, Monona, Etc., which are Meso- 
trophic Lakes 
C = Lakes Kegonsa, Koshkonong which are Algae Filled; 
Eutrophic 
Figure 5. Apparent Reflectance of Madison Area Lakes from ERTS 
Image (Red Band) of 28 August 1972 and 5 August 1973 
Versus Turbidity from Lake Samples Collected from 
4 Throucrh 12 August 19 73 0