Hickey Run Bank Erosion Rate Curves – Why, How, and the Future

CHESAPEAKE BAY FIELD OFFICE COASTAL PROGRAM Hickey Run Bank Erosion Rate Curves – Why, How, and the Future Mark A. Secrist U.S. Fish and Wildlife Service Chesapeake Bay Field Office 177 Admiral Cochrane Drive Annapolis, Maryland 21401 www.fws.gov/chesapeakebay CHESAPEAKE BAY FIELD OFFICE COASTAL PROGRAM Overview • Why Were The Erosion Rate Curves Were Developed • How Were They Developed • What Are Future Plans CHESAPEAKE BAY FIELD OFFICE COASTAL PROGRAM Project Background Partners • USFWS – CBFO • DC DDOE Watershed Assessments • Watts Branch -2002 • Oxon Run - 2004 • Hickey Run - 2005 CHESAPEAKE BAY FIELD OFFICE COASTAL 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 OFFICE COASTAL PROGRAM Bank Assessment for Non-point source Consequences of Sediment (BANCS ) CHESAPEAKE BAY FIELD OFFICE COASTAL PROGRAM BANCS Forms CHESAPEAKE BAY FIELD OFFICE COASTAL PROGRAM USFWS DRAFT Bank Erosion Rate Curve Development Rosgen Level III BANCS Assessment • 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 CHESAPEAKE BAY FIELD OFFICE COASTAL 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 OFFICE COASTAL 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 OFFICE COASTAL PROGRAM Future Plans for BANCS Data & Curve Partners Collect More Data! • USFWS – CBFO • Stantec • Informal group of individuals • Fairfax County interested in improving regional • Ecosystem Planning and Restoration (EPR) bank erosion rate curves • Virginia Department of Environmental • Combine Data from Partners Quality • 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 CHESAPEAKE BAY FIELD OFFICE COASTAL PROGRAM U.S. Fish & Wildlife Service Chesapeake Bay Field Office 177 Admiral Cochrane Drive Annapolis, Maryland 21401 www.fws.gov/chesapeakebay Mark A. Secrist [email protected].

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