using wetbud wizard - soil and landscape rehabilitation...using wetbud wizard rich whittecar, ben...
TRANSCRIPT
![Page 1: Using Wetbud Wizard - Soil and Landscape Rehabilitation...Using Wetbud Wizard Rich Whittecar, Ben Hiza, Stephen Stone, Kerby Dobbs, John McLeod, Mathew Richardson, Tracy Thornton,](https://reader035.vdocuments.site/reader035/viewer/2022071422/611c764399fb314d821d953b/html5/thumbnails/1.jpg)
Using Wetbud Wizard
Rich Whittecar, Ben Hiza, Stephen Stone,
Kerby Dobbs, John McLeod, Mathew Richardson,
Tracy Thornton, and Cal Smith
@ Old Dominion University
Tess Wynn Thompson ,W. Lee Daniels, Matt Gloe,
Eric Neuhaus, O. Waverly Parks, and Candice Piercy
@ Virginia Tech
Zach Agioutantis @ University of Kentucky
Mike Rolband and Staff @ WSSI
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Wetland Hydrology class – Spr 2015
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Pocahontas State Park – valley bottom
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Wetbud Basic Model uses the “checkbook for a bathtub”approach
Old STORAGE + IN - OUT = New STORAGE
Monthly totals
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In the Basic Model, water greater than the “weir depth” is lost from the wetland as
outflow each month.
Wetland bottom elevation
Precipitation
Groundwater
InRunoff
Overbank
Evapotranspiration
Groundwater Out
Outflow
Water in wetland
at start of month
Inflows - Outflows
Inflows OutflowsWater depth at
end of month
without outflow
Weir depth
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Using Wetbud Wizard
1. Create Project and Scenario
CLICK: Define a New Project
Enter: Latitude and Longitude
Enter: Wetland Bottom Elevation
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Using Wetbud Wizard
2. Select Weather Station
CLICK: Richmond International
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Weather Data Requirements
For Wetbud Wizard, Virginia divided into 12 polygons with preloaded data files
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Weather Data Requirements
NOAA (GSOD, GHCN) + NRCS (WETS)
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Weather Data Requirements
Precipitation (daily)
Weather (daily):Temperature: Min, Max, Ave oFDewpoint
Solar (hourly):Extraterrestrial (ETD)Surface (MetStatGlo)
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Evapotranspiration is computed using Thornthwaite or Penman-Monteith
Basic –Monthly ET removed from the one layer
Advanced – specify layer from which to remove water daily
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Using Wetbud Wizard
3. Scenarios Page
Enter: Scenario Name
Enter: Constructed Wetland Area
Enter: Total Area of Wetland
Watershed
Enter: Curve Number for
Wetland Watershed
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Runoff (Hillside basin)
Google Earth Pro w/ USGS Topos
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Runoff (Hillside basin)
Google Earth Pro w/ USGS Topos
Stream Overbank Flow
Basin
Runoff (hillside) Basin
Project Wetland Site
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Runoff (Hillside basin)Google Earth Pro
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Runoff (Hillside basin)
Google Earth Pro w/ Soil Web
Need 1 CN for
Stream Basin
Need 1 CN for
Runoff Basin
Project Wetland Site
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Runoff (Hillside basin)
Google Earth Pro w/ Soil Web
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Information needed to find
Curve Number for Soil Series
Cover type
Hydrologic Condition
Hydrologic Soil Group
CN Table
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Using Wetbud Wizard
4. Calculations/Results Page
Click: Run Calculations
Click: Show Results
Display desired pages
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Is a specific month W, N, or D ?
30% 30%40%
30 years of precipitation data
at representative station
Determined for
each month …
. Data available
on a WETS table
Wet, Normal, Dry YEAR
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Determine WND years w/ WETS tables:#1: Which years have WET (or DRY or NORM) total ppt?
30-yr record of annual
precipitation
1980 2010
DRY
NORM
WET
29.3229.62
29.9530.6731.7432.5733.8234.9935.77
35.8435.9435.9636.1636.3836.6337.5737.7338.0739.5739.8040.2340.6040.8441.41
46.0247.3350.3250.5051.0251.8951.97
35.33”
42.04”
1988
1975
1994
Select the median value in each split
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Determine WND years w/ WETS tables:#2: Did 1975 have a WET “spring”?
D J F M A M J …….
N N W W
2 +2 +3 +2 = 10
Score determines if Spring is WND
4-6 : DRY7-9 : NORM10-12: WET
A Year is WET if both the Spring and the Annual Precipitation are both WET
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Pocahontas State Park – toeslope seeps
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1. Landscape and Geology2. How and where GW used3. New calcs: Wem
Groundwater Considerations
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Piedmont Wetlands:
the interface between uplands,
groundwater, and surface water
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1. Wetbud was designed for TOESLOPES; use it elsewhere with your eyes open!
Groundwater Considerations
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1. Landscape and Geology2. How and where GW used3. New calcs: Wem
Groundwater Considerations
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Using Wem in Basic Model
1. Input GWin or calculate using Wem (well data)
2. Input or calculate Gwout
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Pocahontas Example WetlandGroundwater discharge
along toeslope
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A: cross-section of uphill end
GWin = K A Dh/Dx(for Month B)
Soil K
Ground level at toeslope
Water level in aquifer estimated by Wem
calc’ns
Dh/Dx
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A: cross-section of downhill end
GWout = K A Dh/Dx(for Month B)
Soil
K
Water level at end of Month A
Water level below outlet
Dh/Dx
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In the Basic Model, groundwater is lost to seepage at a constant rate.
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1. Landscape and Geology2. How and where GW used3. New calcs: Wem
4. Example applications
Groundwater Considerations
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Wmo = “Monthly Recharge” = Pptmo - ETmo
Wem = “Effective Monthly Recharge”
Fetter, 1999
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Effective Monthly Recharge: Wem
A time-weighted average recharge value
Wem = Wmo x Da-1Sa=1
N
Response-
decay factor
(D<1.0)
N= # preceding
months
Each month’s
recharge
(Ppt - ET)
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J J A S O N D J
n = 6 W + W + W + W + W + W = Wem
To predict the water table in Month A, how many month’s W must you use?
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J J A S O N D J
Wem
How much influence do past months have on water levels in Month A?
W + W + W + W + W + W =d = 0.99
W + W + W + W + W + W =d = 0.85 Wem
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J J A S O N D J
Wem
How much influence do past months have on water levels in Month A?
W + W + W + W + W + W =d = 0.99
W + W + W + W + W + W =d = 0.85 Wem
Must run every combination of N and D to find the best for prediction
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n: #
of a
ntec
eden
t mon
ths
d: response-decay factor
Matrix of
correlation
coefficients
(R2)
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Verification of Wem Calculations
Whittecar and others (in review)
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Verification of Wem Calculations
Whittecar and others (in review)
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Verification of Wem Calculations
Whittecar and others (in review)
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Wmo = “Monthly Recharge” = Pptmo - ETmo
Wem = “Effective Monthly Recharge”
Must have at least 6 months of water level measurements
from a well just uphill of site
Get readings from the widest possible range of WT levels
(dry to wet)Whittecar and others (in review)
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Wmo = “Monthly Recharge” = Pptmo - ETmo
Wem = “Effective Monthly Recharge”
Routinely use both Thornthwaite and
Penman-Monteith ET methods
Can reconstruct GW levels using weather data for times
with no well dataWhittecar and others (in review)
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1. …
2. Drill, baby, drill (those uphill monitoring wells!)
Groundwater Considerations
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Questions?
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