USGS

 

OFR 2004-1346

Prepared in cooperation with the
South Florida Water Management District

 

2004


An Overview of Urban Stormwater-Management Practices in Miami-Dade County, Florida

Chin, D.A.


cover

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Abstract

Introduction

Relevance and Benefits

Acknowledgments

Urban Stormwater-Management Practices

Overview of Agency Stormwater-Management Requirements

Miami-Dade Department of Environmental Resources Management

Roadways

Community Stormwater Management

South Florida Water Management District

Water-Quantity Criteria

Water-Quality Criteria

Florida Department of Transportation

Open Channels

Storm Drains

Stormwater Management

Design of Exfiltration Trenches

Agency Design Methodologies

South Florida Water Management District

Miami-Dade Department of Environmental Resources Management

Florida Department of Transportation 

Alternative Exfiltration Trench Design

Summary

References Cited

 

Abstract

Agencies with jurisdiction over stormwater-management systems in Miami-Dade County, Florida, include the Miami-Dade Department of Environmental Resources Management (DERM), South Florida Water Management District (SFWMD), and Florida Department of Transportation (FDOT). These agencies are primarily concerned with minor drainage systems that handle runoff from storms with return periods of 10 years or less (DERM), major drainage systems that handle runoff from storms with return periods of 25 years or more (SFWMD), and runoff from major roadways (FDOT). All drainage regulations require retention of at least a specified water-quality volume (defined volume of surface runoff), typically the first inch of runoff. The DERM and FDOT intensity duration frequency (IDF) curves used as a basis for design are similar but different, with differences particularly apparent for short-duration storms. The SFWMD 25-year 3-day storm incorporates an IDF curve that is substantially different from both the IDF curves of DERM and FDOT. A DERM methodology for designing closed exfiltration systems is applicable to storms of 1-hour duration, but is not applicable to all storms with a given T-year return period. A trench design that is applicable to all storms with a given T-year return period is presented as an alternative approach.


Suggested Citation:

Chin, D.A., 2004, An Overview of Urban Stormwater-Management Practices in Miami-Dade County, Florida: U.S. Geological Survey Open-File Report 2004-1346, 17 p.

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