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Hydrologic Connectivity for Highway Runoff Analysis at Watershed Scale

Zhaochun Meng, Jy S. Wu and Craig J. Allan (2013)
University of North Carolina, USA
DOI: https://doi.org/10.14796/JWMM.R246-02
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Abstract

State transportation agencies are a potential stakeholder in the total maximum daily load process and, in some cases, NPDES stormwater permits could be issued to the respective transportation departments. Issues facing the transportation industry include the incorporation of waste load allocation in the NPDES permit, and implementation of appropriate methods to develop waste load allocations and compliance strategies. Based on several stormwater and BMP monitoring projects completed over the last ten years, we have developed a better understanding and a database to characterize pollutant loads from roadway runoff. We continue to work toward the development of a TMDL implementation methodology to assist the transportation industry.

In this paper, we will present an analysis of incorporating the highway network as a separate land-use categories into a watershed model. This particular model defines watershed land-use into forest, shrub/grass, agriculture, developed, barren, wetland, and water. Each of these land-use categories is associated with a set of system coefficients including imperviousness, interception storage, dust fall collection efficiency, canopy characteristics and plant productivity. These coefficients must be modified for the highway land-use category. The model can then be executed to derive the respective pollutant loadings for each land-use category including highway land-use. We then compare the pollutant loadings from our database of highway runoff projects with that obtained from the watershed model. Several modeling scenarios have been attempted to assess the sensitivity of model coefficients. Results of our attempt will eventually provide guidelines for treating roadways as a separate, linear land-use category and developing the concept of a transportation separate stormwater sewer system (TS4).

 

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PAPER INFO

Identification

CHI ref #: R246-02 689
Volume: 21
DOI: https://doi.org/10.14796/JWMM.R246-02
Cite as: JWMM 21: R246-02

Publication History

Received: N/A
First decision: N/A
Accepted: N/A
Published: February 15, 2013

Status

# reviewers: 2
Version: Final published

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© 2013 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

Zhaochun Meng

University of North Carolina, Charlotte, NC, USA
ORCiD:

Jy S. Wu

University of North Carolina, Charlotte, NC, USA
ORCiD:

Craig J. Allan

University of North Carolina, Charlotte, NC, USA
ORCiD:


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


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