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Study of Decomposition of Grass and Leaves

Justin Strynchuk, John C. Royal and Gordon B. England (2003)
Brevard County; Creech Engineers, Inc.
DOI: https://doi.org/10.14796/JWMM.R215-19
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Abstract

A significant source of nutrient input to water bodies is from grass clippings and leaves (yard debris) washed into drainage systems during storms. Brevard County, Florida, Surface Water Improvement Department conducted a study to determine the nutrient release rates from grass clippings and leaves in order to better understand the chemistry and resultant pollutant loading mechanisms.

Sixty-gram samples of mixed freshly cut St. Augustine yard grass (Stenolaphrum secundalum) and oak leaves (Quercus sp.) were placed into opaque containers. Coarsely filtered storm/ditch water was added to fill the containers to the 8-liter marks. Samples were allowed to go anaerobic, typical of wet sump best management practice (BMP) structure conditions, and tested periodically after soaking and processing. At intervals of: 0, 1, 5, 9, 14, 22, 34, 50, 70, 130, and 180 days, triplicate bucket sets were agitated to simulate mixing from stormwater influx, then poured through a Number 35, US Standard Soil Sieve, and the liquid analyzed. The solids that remained in or on the sieve were analyzed, and the results compared to those of the corresponding liquid phase.

The results represent the lawn and leaf litter decomposition and nutrient release rates found in east Florida. This information may be useful in the selection or site design of BMPs for treating nutrients in stormwater, and determining cleaning frequency.

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PAPER INFO

Identification

CHI ref #: R215-19 961
Volume: 11
DOI: https://doi.org/10.14796/JWMM.R215-19
Cite as: CHI JWMM 2003;R215-19

Publication History

Received: N/A
Accepted: N/A
Published: February 15, 2003

Status

# reviewers: 2
Version: Final published

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© 2003 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

Justin Strynchuk

Brevard County, Viera, FL, USA
ORCiD:

John C. Royal

Brevard County, Viera, FL, USA
ORCiD:

Gordon B. England

Creech Engineers, Inc., Melbourne, FL, USA
ORCiD:


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