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Urban Rainwater Composition Study

J. Alex McCorquodale, Donald E. Barbe and Youchao Wang (2002)
University of New Orleans
DOI: https://doi.org/10.14796/JWMM.R208-05
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Abstract

Rainwater samples have been collected in New Orleans from October 1999 to October 2000. The samples were analyzed for water quality parameters: pH, total Kjeldahl nitrogen (TKN), nitrate (NO3-), ammonia (NH3) and total phosphorus (TP). Average concentrations show clear seasonal variations with higher levels in spring and summer and lower levels in winter and fall for NO3-N and TP. Comparison with Lake Pontchartrain parameters shows that the nitrogen concentration is significantly higher in rainwater than in the lake water but the TP is lower in rainwater than in the lake water. Comparison with agricultural areas (Washington Parish) shows that levels of major species of nutrients from urban areas (Orleans Parish) are higher than those of agricultural areas.

The contrasts between urban and agricultural areas can be explained by proximity to the local pollution sources, such as motor vehicles, electric utilities, and petrochemical plants. The findings suggest that for some species of nutrients such as NH4+, NO3- and PO43-, anthropogenic emissions are major sources. A strong inverse relationship generally was found between the observed nutrient concentration and the quantity of rainfall in a particular event; however, the total loading due to rainfall increased with increased amounts of rainfall but at a diminishing rate. The rainfall concentrations of ammonia, nitrate/nitrite and total phosphorus were converted to loads and compared to loads from urban storm runoff loads.

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PAPER INFO

Identification

CHI ref #: R208-05 969
Volume: 10
DOI: https://doi.org/10.14796/JWMM.R208-05
Cite as: CHI JWMM 2002;R208-05

Publication History

Received: N/A
First decision: N/A
Accepted: N/A
Published: February 15, 2002

Status

# reviewers: 2
Version: Final published

Copyright

© 2002 CHI. Some rights reserved.

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Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.

The Journal of Water Management Modeling is an open-access (OA) publication. Open access means that articles and papers are available without barriers to all who could benefit from them. Practically speaking, all published works will be available to a worldwide audience, free, immediately on publication. As such, JWMM can be considered a Diamond, Gratis OA journal.

All papers published in the JWMM are licensed under a Creative Commons Attribution 4.0 International License (CC BY).

JWMM content can be downloaded, printed, copied, distributed, and linked-to, when providing full attribution to both the author/s and JWMM.


AUTHORS

J. Alex McCorquodale

University of New Orleans, New Orleans, LA, USA
ORCiD:

Donald E. Barbe

University of New Orleans, New Orleans, LA, USA
ORCiD:

Youchao Wang

University of New Orleans, New Orleans, LA, USA
ORCiD:


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  JWMM content is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0 DEED)


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