GIS Aspect
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GIS Aspect We used GIS to extract the watershed basin we were going to focus on so that we could obtain the NLCD landcover data for the catchments the development was going to be in.
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GIS Aspect. We used GIS to extract the watershed basin we were going to focus on so that we could obtain the NLCD landcover data for the catchments the development was going to be in. Catchments of Interest. The Process. - PowerPoint PPT Presentation
Transcript of GIS Aspect
GIS Aspect
We used GIS to extract the watershed basin we were going to focus on so that
we could obtain the NLCD landcover data for the catchments the development was
going to be in.
Catchments of Interest
The Process• Clipped Haw River and New Hope watersheds
from a file containing the entire water network for the Southeast U.S.
• Overlaid NHD water body to locate Jordan Lake• Overlaid files for primary, secondary, and local
roads to get an exact location• Overlaid catchment data• Added NHD flowline attributes data table• Overlaid NED file for the area to view the
elevation of catchments
The Process
• Joined catchment shapefile with NLCD flowline attributes to get CUMNLCD
• Used identify function to select catchment of interest and obtain information about landcover
• Compiled data to get total values
NLCD Classifications• 11 Open Water • 12 Perennial Ice/Snow • 21 Developed, Open Space • 22 Developed, Low Density • 23 Developed, Medium
Density • 31 Bare Rock/Sand/Clay • 32 Quarries/Strip
Mines/Gravel Pits • 33 Transitional • 41 Deciduous Forest • 42 Evergreen Forest
• 43 Mixed Forest • 51 Shrub • 61 Orchards/Vineyards/Other • 71 Grassland/Herbaceous • 81 Pasture/Hay • 82 Row Crops • 83 Small Grains • 84 Fallow • 85 Urban/Recreational
Grasses • 91 Woody Wetlands • 92 Emergent Herbaceous
Wetlands
COMID 8897386 COMID8897026
NLCD # % of landcoverLand Area
(km^2) % of landcoverLand Area
(km^2)Total Land Area
(km^2)
11 Open Water 0.164 0.0053 0 0 0.0053
31Bare
Rock/Sand/Clay 0.036 0.0012 0 0 0.0012
33 Transitional 1.47 0.0474 0 0 0.0474
41 Deciduous Forest 62.04 2 57.44 0.562 2.562
42 Evergreen Forest 21.46 0.692 15.63 0.153 0.845
43 Mixed Forest 12.16 0.392 26.84 0.263 0.655
81 Pasture/Hay 1.44 0.046 0 0 0.046
82 Row Crops 0.15 0.0048 0 0 0.0048
91 Woody Wetlands 0.96 0.031 0.09 0.00088 0.03188
92
Emergent Herbaceous
Wetlands 0.11 0.0035 0 0 0.0035
Total Area: 3.226 Total Area: 0.979 4.202
What’s In Store?How will the nutrient runoff rates be affected if
we move the development farther upstream?
