Analysis of Trends in Water-Quality Data for Water Conservation Area 3A, The Everglades, Florida.

摘要

Rainfall and water-quality data bases from the South Florida Water Management District were used to evaluate water-quality trends at 10 locations near or in Water conservation Area 3A in The Everglades. The Seasonal Kendall test was applied to specific conductance, orthophosphate-phosphorus, nitrate-nitrogen, total Kjeldahl nitrogen, and total nitrogen regression residuals for the period 1978-82. residuals of orthophosphate and nitrate quadratic models, based on antecedent 7-day rainfall at inflow gate S-11B, were the only two constituent-structure pairs that showed apparent significant (p less than 0.05) increases in constituent concentrations. Elimination of regression models with distinct residual patterns and data outliers resulted in 17 statistically significant station-water quality combinations for trend analysis. No water-quality trends were observed.