hickey run bank erosion rate curves why, how, and the future...• contains 46 data points from...
TRANSCRIPT
CHESAPEAKE BAY FIELD OFFICECOASTAL PROGRAM
Hickey Run Bank Erosion Rate Curves –
Why, How, and the Future
Mark A. SecristU.S. Fish and Wildlife ServiceChesapeake Bay Field Office177 Admiral Cochrane DriveAnnapolis, Maryland 21401
www.fws.gov/chesapeakebay
CHESAPEAKE BAY FIELD OFFICECOASTAL PROGRAM
• Why Were The Erosion Rate Curves Were Developed
• How Were They Developed
• What Are Future Plans
Overview
CHESAPEAKE BAY FIELD OFFICECOASTAL PROGRAM
Project Background
• USFWS – CBFO • DC DDOE
Partners
Watershed Assessments
• Watts Branch -2002• Oxon Run - 2004 • Hickey Run - 2005
CHESAPEAKE BAY FIELD OFFICECOASTAL PROGRAM
Watershed Assessments
• Rosgen Level I, II, and III Assessment• Bankfull, Planform, and Floodprone
dimensions• Bank and Bed Stability• Predicted Sediment Supply using BANCS
CHESAPEAKE BAY FIELD OFFICECOASTAL PROGRAM
Bank Assessment for Non-point source Consequences of Sediment (BANCS )
CHESAPEAKE BAY FIELD OFFICECOASTAL PROGRAM
USFWS DRAFT Bank Erosion Rate Curve Development
• Monumented Cross Sections with Rebar Endpoints, Toe Pin, and Bank Pins
• Survey at Year One During Installation
• Repeat Surveys at Year Two• Compare Data to Determine
Change• Plot Data – Lateral Bank
Erosion Rate vs. NBS• Develop Regional Bank
Erosion Rate Curve
Rosgen Level III BANCS Assessment
CHESAPEAKE BAY FIELD OFFICECOASTAL PROGRAM
• Contains 46 Data Points from Watts Branch, Oxon Run, and Hickey Run• Included in 2014 Recommendations of the Expert Panel to Define Removal
Rates for Individual Stream Restoration Projects as the Hickey Curve
CHESAPEAKE BAY FIELD OFFICECOASTAL PROGRAM
Limitations of Curve
• 30 BEHI/NBS Combinations• Limited Data Points – 46• Large Portion of Data is High/Very High BEHI With Low/Moderate NBS• USFWS Decided Additional Data Was Needed to Make Data Set More Robust
CHESAPEAKE BAY FIELD OFFICECOASTAL PROGRAM
Future Plans for BANCS Data & Curve
• Informal group of individuals interested in improving regional bank erosion rate curves
• Combine Data from Partners • Obtain 6 Data Points For Each of
The 30 BEHI/NBS Combinations• Obtain 6 Data Points For Each of
The 30 BEHI/NBS Combinations• Recently decided to set up a more
formal arrangement
Collect More Data!Partners
• USFWS – CBFO • Stantec• Fairfax County • Ecosystem Planning and Restoration (EPR) • Virginia Department of Environmental
Quality
CHESAPEAKE BAY FIELD OFFICECOASTAL PROGRAM
U.S. Fish & Wildlife Service
Chesapeake Bay Field Office
177 Admiral Cochrane Drive
Annapolis, Maryland 21401
www.fws.gov/chesapeakebay
Mark A. Secrist