Data for 'Sustainability of Irrigation and Streamflow in the Western US'

Materials required to reproduce the analysis reported in the paper. 

Dec 17, 2025 Addition: The final IrrMapper training dataset from which points were extracted, Earth Engine raster information was exported, training tables built, and raster inference executed using https://github.com/dgketchum/EEMapper. Each land type has a shapefile (uncultivated, dryland agriculture, irrigated agriculture with year of irrigation, and wetlands), each of which has tens of thousands of polygons, providing a land cover estimate over hundreds of thousands of square kilometers.

Notes: There are shapefiles for 'dryland' (unirrigated crops) and 'fallow' (equipped but not irrigated for the year in the attribute table). We combine these into a single, unirrigated crops class for IrrMapper.

Projection: 

North_America_Albers_Equal_Area_Conic
Properties
Units: meters
Static (relies on a datum which is plate-fixed)
Celestial body: Earth
Method: Albers Equal Area
WKT
PROJCRS["North_America_Albers_Equal_Area_Conic",
    BASEGEOGCRS["NAD83",
        DATUM["North American Datum 1983",
            ELLIPSOID["GRS 1980",6378137,298.257222101,
                LENGTHUNIT["metre",1]]],
        PRIMEM["Greenwich",0,
            ANGLEUNIT["Degree",0.0174532925199433]]],
    CONVERSION["North_America_Albers_Equal_Area_Conic",
        METHOD["Albers Equal Area",
            ID["EPSG",9822]],
        PARAMETER["Latitude of false origin",40,
            ANGLEUNIT["Degree",0.0174532925199433],
            ID["EPSG",8821]],
        PARAMETER["Longitude of false origin",-96,
            ANGLEUNIT["Degree",0.0174532925199433],
            ID["EPSG",8822]],
        PARAMETER["Latitude of 1st standard parallel",20,
            ANGLEUNIT["Degree",0.0174532925199433],
            ID["EPSG",8823]],
        PARAMETER["Latitude of 2nd standard parallel",60,
            ANGLEUNIT["Degree",0.0174532925199433],
            ID["EPSG",8824]],
        PARAMETER["Easting at false origin",0,
            LENGTHUNIT["metre",1],
            ID["EPSG",8826]],
        PARAMETER["Northing at false origin",0,
            LENGTHUNIT["metre",1],
            ID["EPSG",8827]]],
    CS[Cartesian,2],
        AXIS["(E)",east,
            ORDER[1],
            LENGTHUNIT["metre",1]],
        AXIS["(N)",north,
            ORDER[2],
            LENGTHUNIT["metre",1]],
    USAGE[
        SCOPE["Not known."],
        AREA["North America - onshore and offshore: Canada - Alberta; British Columbia; Manitoba; New Brunswick; Newfoundland and Labrador; Northwest Territories; Nova Scotia; Nunavut; Ontario; Prince Edward Island; Quebec; Saskatchewan; Yukon. United States (USA) - Alabama; Alaska (mainland); Arizona; Arkansas; California; Colorado; Connecticut; Delaware; Florida; Georgia; Idaho; Illinois; Indiana; Iowa; Kansas; Kentucky; Louisiana; Maine; Maryland; Massachusetts; Michigan; Minnesota; Mississippi; Missouri; Montana; Nebraska; Nevada; New Hampshire; New Jersey; New Mexico; New York; North Carolina; North Dakota; Ohio; Oklahoma; Oregon; Pennsylvania; Rhode Island; South Carolina; South Dakota; Tennessee; Texas; Utah; Vermont; Virginia; Washington; West Virginia; Wisconsin; Wyoming."],
        BBOX[23.81,-172.54,86.46,-47.74]],
    ID["ESRI",102008]]
Proj4
+proj=aea +lat_0=40 +lon_0=-96 +lat_1=20 +lat_2=60 +x_0=0 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs
Extent
-172.54, 23.81, -47.74, 86.46