4. Secchi depth and average water depth 5. Submarine illumination 6. Water color 7. Suspended solids 8. March diurnal temperature and salinity 9. March diurnal dissolved oxygen 10. March diurnal pH 11. April diurnal temperature and salinity 12. April diurnal dissolved oxygen 13. April diurnal pH 14. Means, maxima, minima and ranges of diurnal data 15. Monthly averages for water quality parameters Pace 42