Steps and Values

Created ArcGIS Pro Project

Set map spatial reference to NAD 1983 UTM Zone 14N

From USGS site https://viewer.nationalmap.gov/basic/

Downloaded 10m NEDs for central Texas Nueces river area of Texas and added to OriginalData folder

USGS 13 arc-second n30w100 1 x 1 degree

USGS 13 arc-second n30w101 1 x 1 degree

USGS 13 arc-second n31w100 1 x 1 degree

USGS 13 arc-second n31w101 1 x 1 degree

DEMs have a GCS of NAT 1983

Set map project environments:

Current Workspace:

C:\NR6930\lab_6_hydro_analysis\NR6930_Lab_6\NR6930_Lab_6.gdb

Scratch Workspace: C:\NR6930\lab_6_hydro_analysis\NR6930_Lab_6\NR6930_Lab_6.gdb

Output Coordinate System:

NAD 1983 UTM Zone 14N

Used Raster Functions/Data Management/Mosaic Raster

Added the four 10m NEDs

Operation as Blend

Pixel Type 32 bit float

Left all other defaults

Created Mosaics Rasters layer

Used Data Management/Project Raster to project Mosaics Rasters layer:

NAD 1983 UTM Zone 14N

Saved as ned10_nr_pr in Raster folder

Resampling Technique = Cubic Convolution

Left all other defaults

Used Spatial Analyst\Fill tool on ned10_nr_pr and saved as ned10_nr_f

Used Spatial Analyst\Flow Direction tool on ned10_nr_f and saved as ned10_nr_fd

Flow Direction Type = D8

Used Spatial Analyst\Flow Accumulation tool on ned10_fd and saved as ned10_nr_fa

Output Data Type – Integer

Created Hillshade from ned10_nr_pr and saved as ned10_nr_hs.

Found the confluence of Kent Creek and the West Frio river. The pixel value of the ned10_nr_fa where the point was placed was 616538. Right clicked to add new point shapefile to the Vector folder. On the Edit toolbar, used Create Feature to create the point, pour_pt_nr_kc.

Used the Watershed tool to create a watershed from ned10_nr_fd and pour_pt_nr_kc, saved as ned10_kc_ws.

Used the Raster to Polygon tool to create a polygon from ned10_kc_ws and named ned10_kc_ws_poly.

Checked Simplify Polygons

Used Extract by Mask tool to clip ned10_nr_fa raster to shape of ned10_kc_ws_poly and saved as ned10_kc_fa.

Added the USGS National Map basemap.

Set symbology of ned10_kc_fa to Min/Max.

Max of 2500 and Min of 2499 matched the stream network with the USGS network.

Raclassified ned10_kc_fa

0-2499 = NODATA

2500-616538 = 1

NODATA = NODATA

Used Spatial Analyst/Hydrology/Stream Order to create ned10_kc_so

Used Raster to Polyline to create ned10_kc_so_line

Symbolized with Unique values to grid_code attribute.

Created Summary Statistics table.

LAYOUT

Used Extract by Mask tool on ned_nr_hs using ned10_kc_ws_poly to create hillshade for watershed area only and saved as nr_hs_mask.

Downloaded 4 NAIP imagery files from USGS TNM download site to cover watershed area.

Mosaic the 4 NAIP images and created temporary layer

Used Extract by Mask tool on layer using ned10_kc_ws_poly to create NAIP for watershed area only and saved as naip_mask

Used USGS Topo as basemap and set to 30% transparency

Put naip_mask under basemap and set to 50% transparency

Put nr_hs_mask under naip_mask

Created Layout as instructed.