ENSC 202 – 2004Phase 1 Introduction
Watershed Assessment (ENSC 202)
Introduction to Phase 1Extracted from Vermont ANR Stream Geomorphic Assessment Protocols
Handbook - Introduction
ENSC 202 – 2004Phase 1 Introduction
Objectives of Phase 1
• Reference stream typing• Stream impact rating• Provisional stream geomorphic assessment
– stream condition– adjustment process– sensitivity
ENSC 202 – 2004Phase 1 Introduction
Things you’ll need
Other useful resources…
ENSC 202 – 2004Phase 1 Introduction
Key Resource: Data formsAppendix A
ENSC 202 – 2004Phase 1 Introduction
Maintain a QA record
ENSC 202 – 2004Phase 1 Introduction
Key Resource: Data baseAppendix B
• Instructions
• Interface
ENSC 202 – 2004Phase 1 Introduction
Components to Phase 1 – Step 1
• Draw the watershed boundaries
• Delineate reach breaks– Valley widths– Valley slope (contours/inch)– Geologic materials– Tributary influences (>10% watershed area)
• Name the reaches
ENSC 202 – 2004Phase 1 Introduction
WatershedDelineation
ENSC 202 – 2004Phase 1 Introduction
Valley Width criteria
ENSC 202 – 2004Phase 1 Introduction
Valley Slope criteria
>5/in
2-5/in
<2/in
<1/in
ENSC 202 – 2004Phase 1 Introduction
Geology & Tributary criteria
• Geology: major transitions (NRCS/VTGS)
• Tributaries: above major inputs
ENSC 202 – 2004Phase 1 Introduction
Reach Naming Conventions
• M# mainstem reaches
• M#T#.# major (>10%) tributary.reach of mainstem
• M#S#.# minor (<10%) tributary.reach of mainstem
• M#T#.#S#.# minor tributary.reach of a major tributaries to mainstems
ENSC 202 – 2004Phase 1 Introduction
M2S1.1
M2S1.2
M1T2.1
M1T2.2
M1T2.3
M1
M3
M2
M1T1.1
M1T1.2
M1T2.2S1.1
M1T2.2S1.2
We will probably subsample the total number of reaches for the purposes of Phase 2 field work.
ENSC 202 – 2004Phase 1 Introduction
Starting the Database Entry Processes
• Open, save, and rename the database• Enter detailed reach descriptions• Record town name• Record latitude and longitude
The database…