WATER QUALITY TRENDS AT INFLOWS TO EVERGLADES NATIONAL PARK1
作者:
William W. Walker,
期刊:
JAWRA Journal of the American Water Resources Association
(WILEY Available online 1991)
卷期:
Volume 27,
issue 1
页码: 59-72
ISSN:1093-474X
年代: 1991
DOI:10.1111/j.1752-1688.1991.tb03113.x
出版商: Blackwell Publishing Ltd
关键词: Everglades;seasonal Kendall test;water quality;statistics;eutrophication;trend analysis;phosphorus;nitrogen;nutrients;wetlands;Florida
数据来源: WILEY
摘要:
ABSTRACT:Water quality data collected at inflows to Everglades National Park (ENP) are analyzed for trends using the seasonal Kendall test (Hirschet al., 1982; Hirsch and Slack, 1984). The period of record is 1977–1989 for inflows to Shark River Slough and 1983–1989 for inflows to Taylor Slough and ENP's Coastal Basin. The analysis considers 20 water quality components, including nutrients, field measurements, inorganic species, and optical properties.Significant (p<0.10) increasing trends in total phosphorus concentration are indicated at eight out of nine stations examined. When the data are adjusted to account for variations in antecedent rainfall and water surface elevation, increasing trends are indicated at seven out of nine stations. Phosphorus trend magnitudes range from 4 percent/year to 21 percent/year Decreasing trends in the Total N/P ratio are detected at seven out of nine stations. N/P trend magnitudes range from ‐7 percent/year to ‐15 percent/year. Trends in water quality components other than nutrients are observed less frequently and are of less importance from a water‐quality‐management perspective. The apparent nutrient trends are not explained by variations in marsh water elevation, antecedent rainfall, flow
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