Floodplain Ecosystem Service Mapper

Delaware River
Basin Boundary

Streams: Median Bank Height (m)

⚊ No data
⚊ 0 to 0.25
⚊ 0.25 to 0.50
⚊ 0.50 to 0.75
⚊ 0.75 to 1.00
⚊ 1.00 to 1.25
⚊ > 1.25

Streams: Median Channel Width (m)

⚊ No data
⚊ 0 to 5
⚊ 5 to 10
⚊ 10 to 15
⚊ 15 to 20
⚊ > 20

Streams: Median Floodplain Width (m)

⚊ No data
⚊ 0 to 20
⚊ 20 to 40
⚊ 40 to 60
⚊ 60 to 80
⚊ > 80

Streams: Ratio of Channel
Width to Depth (%)

⚊ No data
⚊ 0 to 10
⚊ 10 to 20
⚊ 20 to 30
⚊ 30 to 40
⚊ > 40

Waterbodies

Floodplains

Field Sites

Physiographic Provinces

Appalachian Plateaus
Valley and Ridge
New England
Piedmont
Coastal Plain

HUC 8 Boundaries

HUC 8 Total Floodplain
Ecosystem Services Value ($)

0 to 10
10 to 20
20 to 30
30 to 40
40 to 50
> 50

HUC 8 Sediment and
Nutrient Value ($)

0 to 5
5 to 10
10 to 15
15 to 20
20 to 25
> 25

HUC 8 Flood
Attenuation Value ($)

0 to 5
5 to 10
10 to 15
15 to 20
20 to 25
> 25

HUC 8 Sediment
Net Flux (units)

-400 to -300
-300 to -200
-200 to -100
-100 to 0
0 to 100
100 to 200
200 to 300
> 300

HUC 8 Sediment
Floodplain Flux (units)

0 to 500
500 to 1,000
1,000 to 1,500
1,500 to 2,000
2,000 to 2,500
> 2,500

HUC 8 Sediment
Streambank Flux (units)

-3,000 to -2,500
-2,500 to -2,000
-2,000 to -1,500
-1,500 to -1,000
-1,000 to -500
> -500

HUC 8 Total Nitrogen
Net Flux (units)

-125 to -100
-100 to -75
-75 to -50
-50 to -25
-25 to 0
> 0

HUC 8 Total Nitrogen
Floodplain Flux (units)

0 to 50
50 to 100
100 to 150
150 to 200
200 to 250
> 250

HUC 8 Total Nitrogen
Streambank Flux (units)

-400 to -350
-350 to -300
-300 to -250
-250 to -200
-200 to -150
-150 to -100
> -100

HUC 8 Total Phosphorus
Net Flux (units)

-4 to -2
-2 to 0
0 to 2
2 to 4
> 4

HUC 8 Total Phosphorus
Floodplain Flux (units)

0 to 5
5 to 10
10 to 15
15 to 20
20 to 25
> 25

HUC 8 Total Phosphorus
Streambank Flux (units)

-30 to -25
-25 to -20
-20 to -15
-15 to -10
> -10

HUC 12 Boundaries

HUC 12 Total Floodplain
Ecosystem Services Value ($)

0.00 to 0.25
0.25 to 0.50
0.50 to 0.75
0.75 to 1.00
1.00 to 1.25
1.25 to 1.50
1.50 to 1.75
> 1.75

HUC 12 Sediment and
Nutrient Value ($)

0.0 to 0.2
0.2 to 0.4
0.4 to 0.6
0.6 to 0.8
0.8 to 1.0

HUC 12 Flood
Attenuation Value ($)

0.0 to 0.2
0.2 to 0.4
0.4 to 0.6
0.6 to 0.8
0.8 to 1.0

HUC 12 Sediment
Net Flux (units)

-100 to -75
-75 to -50
-50 to -25
-25 to 0
0 to 25
25 to 50
50 to 75
> 75

HUC 12 Sediment
Floodplain Flux (units)

0 to 20
20 to 40
40 to 60
60 to 80
80 to 100

HUC 12 Sediment
Streambank Flux (units)

-100 to -80
-80 to -60
-60 to -40
-40 to -20
-20 to 0

HUC 12 Total Nitrogen
Net Flux (units)

-10.0 to -7.5
-7.5 to -5.0
-5.0 to -2.5
-2.5 to 0
0.0 to 2.5
2.5 to 5.0
5.0 to 7.5
7.5 to 10.0

HUC 12 Total Nitrogen
Floodplain Flux (units)

0.0 to 2.0
2.0 to 4.0
4.0 to 6.0
6.0 to 8.0
8.0 to 10.0

HUC 12 Total Nitrogen
Streambank Flux (units)

-10 to -8
-8 to -6
-6 to -4
-4 to -2
-2 to 0

HUC 12 Total Phosphorus
Net Flux (units)

-1.00 to -0.75
-0.75 to -0.50
-0.50 to -0.25
-0.25 to 0.00
0.00 to 0.25
0.25 to 0.50
0.50 to 0.25
0.75 to 1.00

HUC 12 Total Phosphorus
Floodplain Flux (units)

0.0 to 0.2
0.2 to 0.4
0.4 to 0.6
0.6 to 0.8
0.8 to 1.0

HUC 12 Total Phosphorus
Streambank Flux (units)

-1.0 to -0.8
-0.8 to -0.6
-0.6 to -0.4
-0.4 to -0.2
-0.2 to 0.0

Chesapeake
Bay Boundary

Streams: Median Bank Height (m)

⚊ No data
⚊ 0 to 0.40
⚊ 0.40 to 0.80
⚊ 0.80 to 1.20
⚊ 1.20 to 1.60
⚊ > 1.60

Streams: Median Channel Width (m)

⚊ No data
⚊ 0 to 10
⚊ 10 to 20
⚊ 20 to 30
⚊ 30 to 40
⚊ > 40

Streams: Median Floodplain Width (m)

⚊ No data
⚊ 0 to 30
⚊ 30 to 60
⚊ 60 to 90
⚊ 90 to 120
⚊ > 120

Streams: Ratio of Channel
Width to Depth (%)

⚊ No data
⚊ 0 to 10
⚊ 10 to 20
⚊ 20 to 30
⚊ 30 to 40
⚊ > 40

Waterbodies

Floodplains

Field Sites

Physiographic Provinces

Appalachian Plateaus
Valley and Ridge
Blue Ridge
Piedmont
Coastal Plain

HUC 4 Boundaries

HUC 8 Boundaries

HUC 8 Total Floodplain
Ecosystem Services Value ($)

0 to 10
10 to 20
20 to 30
30 to 40
40 to 50
> 50

HUC 8 Sediment and
Nutrient Value ($)

0 to 5
5 to 10
10 to 15
15 to 20
20 to 25
> 25

HUC 8 Flood
Attenuation Value ($)

0 to 5
5 to 10
10 to 15
15 to 20
20 to 25
> 25

HUC 8 Sediment
Net Flux (units)

-400 to -300
-300 to -200
-200 to -100
-100 to 0
0 to 100
100 to 200
200 to 300
> 300

HUC 8 Sediment
Floodplain Flux (units)

0 to 500
500 to 1,000
1,000 to 1,500
1,500 to 2,000
2,000 to 2,500
> 2,500

HUC 8 Sediment
Streambank Flux (units)

-3,000 to -2,500
-2,500 to -2,000
-2,000 to -1,500
-1,500 to -1,000
-1,000 to -500
-> -500

HUC 8 Total Nitrogen
Net Flux (units)

-125 to -100
-100 to -75
-75 to -50
-50 to -25
-25 to 0
> 0

HUC 8 Total Nitrogen
Floodplain Flux (units)

0 to 50
50 to 100
100 to 150
150 to 200
200 to 250
> 250

HUC 8 Total Nitrogen
Streambank Flux (units)

-400 to -350
-350 to -300
-300 to -250
-250 to -200
-200 to -150
-150 to -100
> -100

HUC 8 Total Phosphorus
Net Flux (units)

-4 to -2
-2 to 0
0 to 2
2 to 4
> 4

HUC 8 Total Phosphorus
Floodplain Flux (units)

0 to 5
5 to 10
10 to 15
15 to 20
20 to 25
> 25

HUC 8 Total Phosphorus
Streambank Flux (units)

-30 to -25
-25 to -20
-20 to -15
-15 to -10
> -10

HUC 12 Boundaries

HUC 12 Total Floodplain
Ecosystem Services Value ($)

0.00 to 0.25
0.25 to 0.50
0.50 to 0.75
0.75 to 1.00
1.00 to 1.25
1.25 to 1.50
1.50 to 1.75
> 1.75

HUC 12 Sediment and
Nutrient Value ($)

0.0 to 0.2
0.2 to 0.4
0.4 to 0.6
0.6 to 0.8
0.8 to 1.0

HUC 12 Flood
Attenuation Value ($)

0.0 to 0.2
0.2 to 0.4
0.4 to 0.6
0.6 to 0.8
0.8 to 1.0

HUC 12 Sediment
Net Flux (units)

-100 to -75
-75 to -50
-50 to -25
-25 to 0
0 to 25
25 to 50
50 to 75
> 75

HUC 12 Sediment
Floodplain Flux (units)

0 to 20
20 to 40
40 to 60
60 to 80
80 to 100

HUC 12 Sediment
Streambank Flux (units)

-100 to -80
-80 to -60
-60 to -40
-40 to -20
-20 to 0

HUC 12 Total Nitrogen
Net Flux (units)

-10.0 to -7.5
-7.5 to -5.0
-5.0 to -2.5
-2.5 to 0
0.0 to 2.5
2.5 to 5.0
5.0 to 7.5
7.5 to 10.0

HUC 12 Total Nitrogen
Floodplain Flux (units)

0.0 to 2.0
2.0 to 4.0
4.0 to 6.0
6.0 to 8.0
8.0 to 10.0

HUC 12 Total Nitrogen
Streambank Flux (units)

-10 to -8
-8 to -6
-6 to -4
-4 to -2
-2 to 0

HUC 12 Total Phosphorus
Net Flux (units)

-1.00 to -0.75
-0.75 to -0.50
-0.50 to -0.25
-0.25 to 0.00
0.00 to 0.25
0.25 to 0.50
0.50 to 0.25
0.75 to 1.00

HUC 12 Total Phosphorus
Floodplain Flux (units)

0.0 to 0.2
0.2 to 0.4
0.4 to 0.6
0.6 to 0.8
0.8 to 1.0

HUC 12 Total Phosphorus
Streambank Flux (units)

-1.0 to -0.8
-0.8 to -0.6
-0.6 to -0.4
-0.4 to -0.2
-0.2 to 0.0

Floodplain Ecosystem Service Mapper

Healthy floodplains and wetlands provide critical ecosystem services to local and downstream communities by retaining sediments, nutrients, and floodwaters. Land conversion and degradation diminish floodplain functionality and services.

This preliminary web mapping application displays floodplain extent, stream channel metrics, and field site data. Data and the FACET software tool are available via the Data Download button. Please stay tuned for future updates.

Click the Select Area of Interest tab below to toggle between the Delaware River watershed or the Chesapeake Bay watershed. Click the Select Layers tab to toggle layers on the map. Click the User Guide button above for additional instructions.

Delaware River Watershed

Chesapeake Bay Watershed

Floodplain and Channel Evaluation Tool (FACET) Data

Data and the FACET software tool are available via the Data Download button.

Floodplains

The floodplain layer is a geometrically simplified polygon that represents the "active" (field-defined; circa 2-year recurrence) floodplain extent.

Stream Channel Metrics

The stream network shows the location of the stream based on topography. Each stream segment contains channel metrics computed by FACET.

Bank Height	The height of the streambank relative to the bank points and bottom of the channel.
Channel Width	The width between bank points.
Ratio of Channel Width to Depth	Channel width divided by bank height.
Floodplain Width	The width of the floodplain extent at that cross section.

Field Site Data

Streambed Particle Size D50	Median particle size of surface sediment in the stream channel, measured with about 100 pebble counts throughout the reach if wadeable, or ten grabs of bed sediment if non-wadeable.
Streambed Percent Fine+Sand	Fine sediment plus sand cover on the surface of the streambed that was measured during pebble counts throughout the reach, as a percent of total.
Mean Floodplain Vertical Accretion Rate	The mean rate of vertical accretion on the active floodplain in each study site, measured using dendrogeomorphic techniques. Positive values are depositional with vertical growth, negative values are erosional with vertical loss.
Mean Streambank Lateral Erosion Rate	Adjusted mean rate of lateral erosion of the eroding alluvial streambanks in each study site, using dendrogeomorphic techniques, adjusted by the proportion of streambank in the reach that was eroding to represent the whole reach. By definition of the method, all values are negative indicating erosion with lateral loss of streambank.
Streambank Flux Rates	Sediment, sediment-nitrogen (N), or sediment-phosphorus (P) flux rate of alluvial streambank in the study site reach measured using dendrogeomorphic techniques. Positive rates indicate deposition of material, and negative rates indicate erosion of material. By definition of the method, all values are negative. Flux is calculated as the product of adjusted mean lateral erosion rate, mean streambank sediment bulk density, and mean streambank height times two.
Floodplain Flux Rates	Sediment, sediment-nitrogen (N), or sediment-phosphorus (P) flux rate of active floodplain in the study site reach measured using dendrogeomorphic techniques. Positive rates indicate deposition of material, and negative rates indicate erosion of material. Flux is calculated as the product of mean vertical accretion rate, mean floodplain sediment bulk density, and mean total floodplain width.
Net Balance Flux Rates	Net balance of the sediment, sediment-nitrogen (N), or sediment-phosphorus (P) flux rates of active floodplain and alluvial streambank in the study site reach. Positive rates indicate deposition of material, and negative rates indicate erosion of material. Flux is calculated as the sum of floodplain and streambank fluxes.