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A Study Of Vertical And Horizontal Visibility Relationships Under Water, Jean J. Mccarthy
A Study Of Vertical And Horizontal Visibility Relationships Under Water, Jean J. Mccarthy
Journal of the Minnesota Academy of Science
A threefold study was undertaken to:
1) determine the nature of the mathematical relationship between vertical and horizontal visibility underwater
2) examine the feasibility of using the Secchi disc method to measure horizontal visibility in the photic zone;
3) obtain descriptive data on vertical and horizontal visibility in selected lakes of southern Minnesota.
The Secchi disc technique for measuring· visibility was modified to accommodate horizontal readings, and data were col1lected from 12 lakes at 5, 15 and 25 feet depths under controlled conditions. Reliability correlations were significant (p ( .01) and ranged from .764 to .994. Correlations and regression equations …