Limited Influence of Urban Stormwater Runoff on Salt Marsh Platform and Marsh Creek Oxygen Dynamics in Coastal Georgia

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• 作者：William B. Savidge ; Jonathan Brink ; Jackson O. Blanton
• 关键词：Estuary ; Tidal creeks ; Salt marsh ; Hypoxia ; Stormwater ; Runoff
• 刊名：Environmental Management
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：58
• 期：6
• 页码：1074-1090
• 全文大小：2,387 KB
• 刊物类别：Earth and Environmental Science
• 刊物主题：Environment
  Environmental Management
  Ecology
  Nature Conservation
  Atmospheric Protection, Air Quality Control and Air Pollution
  Forestry Management
  Waste Water Technology, Water Pollution Control, Water Management and Aquatic Pollution
  
• 出版者：Springer New York
• ISSN：1432-1009
• 卷排序：58

文摘

Oxygen concentrations and oxygen utilization rates were monitored continuously for 23 months on marsh platforms and in small tidal creeks at two sites in coastal Georgia, USA, that receive urban stormwater runoff via an extensive network of drainage canals. These data were compared to nearby control sites that receive no significant surface runoff. Overall, rainfall and runoff per se were not associated with differences in the oxygen dynamics among the different locations. Because of the large tidal range and long tidal excursions in coastal Georgia, localized inputs of stormwater runoff are rapidly mixed with large volumes of ambient water. Oxygen concentrations in tidal creeks and on flooded marsh platforms were driven primarily by balances of respiration and photosynthesis in the surrounding regional network of marshes and open estuarine waters. Local respiration, while measurable, was of relatively minor importance in determining oxygen concentrations in tidal floodwaters. Water residence time on the marshes could explain differences in oxygen concentration between the runoff-influenced and control sites.