GISHydro@Maryland


A Collaboration between the Department of Civil and Environmental Engineering and the Maryland State Highway Administration, Office of Structures (OOS)
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MD Hydrology Panel

Maryland Hydrology Panel Report


Overview

In June, 1996, Maryland State Highway Administration (SHA) and the Maryland Department of Environment (MDE) appointed the Maryland Hydrology Panel (the Panel) to explore the development of improved procedures that would ensure an optimal balance between preserving the environmental quality of Maryland streams and the hydraulic performance of highway drainage structures. The Panel: 1) worked closely with the staffs of the two Departments; 2) extensively reviewed Maryland policies and design approaches, as well as those of other States; and 3) conducted extensive research directed toward improving the statistical and deterministic foundations of the two Department’s hydrologic modeling procedures.

In February, 2001 the Panel issued a report entitled, Applications of Hydrologic Methods in Maryland. Adoption of the recommendations of the February 2001 report has led to significant cost and time savings in the design/review processes of the two Departments through better utilization of computer and human resources. Of even greater importance, the implementation of the recommendations has increased confidence in the design computations.

The Hydrology Panel has continued to meet continuously since publication of the first edition of the report. A second edition was published in 2006, a third edition in 2010, and now a fourth edition in 2016. This web page provides an archive of all editions of the report.

This document presents a set of hydrologic modeling procedures that are designed to ensure an optimal balance between preserving the environmental quality of Maryland streams and the hydraulic performance and safety of highway structures. These procedures are recommended by the Maryland Hydrology Panel for use by the Maryland Department of Environment and the Maryland State Highway Administration.

Download Report

The documents below represent a comprehensive archive of all editions of the report: Application of Hydrologic Methods in Maryland, prepared by the Hydrology Panel convened by the Maryland State Highway Administration and the Maryland Department of the Environment.

Updates to the Fourth Edition
The following revisions are included in the July 2016 Fourth Edition of the Hydrology Panel report:
  • Executive Summary was updated to acknowledge the three previous editions of the Hydrology Panel report that were completed in February 2001, August 2006, and September 2010
  • A new Chapter 5 entitled, "Regression equations for estimating low flows for fish passage in Maryland" has been added
  • A new Chapter 6 entitled, "Estimation of discharges in tidal reaches" has been added
  • Appendix 3: Updated regression equations were developed for the combined Piedmont/Blue Ridge region
  • Appendix 3: Updated regression equations were developed for the Appalachian Plateau region
  • Appendix 3: An updated regression equation calculator was developed
  • A new Appendix 8 entitled, "Historical Summary of Regression Equations to Predict Flood Flows in Maryland" replaces the overview of GISHydro2000. That overview and users manual is available from the GISHydro web site under the "Documentation" link
  • Appendix 9: Links to the websites were updated