Accession Number:

ADA508378

Title:

Nitrogen Cycling and Fate in a Floodplain Backwater of the Upper Mississippi River

Descriptive Note:

Technical note

Corporate Author:

ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS ENVIRONMENTAL LAB

Personal Author(s):

Report Date:

2009-09-01

Pagination or Media Count:

16.0

Abstract:

Backwaters connected to large rivers efficiently retain nitrate and can play an important role in reducing downstream loading to coastal marine environments. However, biotic assimilation and transient storage can account for a significant portion of the nitrate uptake versus denitrification. The fate of this nitrogen N pool is largely unknown. Is assimilated nitrate stored temporarily and exported from the system later as another N species or is it eventually routed from recycling pathways to denitrification or burial This information is critical for modeling and managing large river-floodplain systems. The objective of this research was to examine N fluxes and transformations in a backwater system of the Upper Mississippi River within the context of an N budget in order to provide more insight into the fate of nitrate.

Subject Categories:

  • Ecology
  • Inorganic Chemistry
  • Hydrology, Limnology and Potamology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE