Geospatial Technology Idaho Department of Water Resources GIS Analyst (208) 287-4800 (208) 287-6700 322 East Front Street Boise Idaho 83720 gisinfo@idwr.idaho.gov 20230308 Geospatial Technology Idaho Department of Water Resources GIS Analyst (208) 287-4800 (208) 287-6700 322 East Front Street Boise Idaho 83720 gisinfo@idwr.idaho.gov https://data-idwr.opendata.arcgis.com/pages/gis-data#IrrigatedLands File Geodatabase Feature Class Land Use & Land Cover, 2019, Idaho portion of the Bear River Basin vector digital data Original Edition: BRC_1976 Published June 2, 1992 Second Edition: BRC_2009 Published July 15, 2013 Third Edition: BRC_2019 Published March 8, 2023 http://www.idwr.idaho.gov/gisdata 2019 LandUse Classification for the Bear River Compact Area 2022-05-02T00:00:00 2023-03-08T00:00:00 Bear River Compact Third First Geospatial Technology Section Idaho Department of Water Resources GIS Analyst (208) 287-4800 (208) 287-6700 322 East Front Street Boise Idaho 83720 gisinfo@idwr.idaho.gov Geospatial Technology Geospatial Technology <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Land use and land cover developed for the Idaho portion of the Bear River Basin as part of the Bear River Compact. The Bear River Compact was established in 1958 to determine how Idaho, Utah, and Wyoming would distribute and use water from the Bear River. For more details see the following: Bear River Commission, "Bear River Compact As Amended and Bylaws of Bear River Commission", April 1990. Kramber, W.J., H. Anderson, M. Verdun, G. Austiguy, and B. Ondrechen, "Idaho's system for monitoring water use in the Bear River Basin", Geo Info Systems, May 1993, pp. 8-52.</SPAN></P></DIV></DIV></DIV> For applications requiring land use and land cover data. This land classification is used in the Idaho portion of the Bear River Compact (BRC) depletion study. This update is based on a review of new acres irrigated and acres taken out of irrigation since January 1, 1976, both new full supply and supplemental supply. This 2019 land classification was generated prior to the commencement of the Bear River Basin Adjudication (BRBA) and relies heavily on photo interpretation. The in-house spatial datasets used to locate the place of use (POU) and point of diversion (POD) for all active water right applications, permits, rights, and transfers in basins 11, 13, and 15 provide justification for potentially reclassifying the original 1976 base map to determine depletions. It is expected that water right POU changes, and consequently land classifications, will occur with the forthcoming adjudication. This land classification is more than a snapshot of the 2019 irrigation season/status for the area. Instead, this land classification was used to determine additional depletions, if any, that have occurred since the 1976 base map was created during the early years of the Bear River Compact. Reported changes in irrigated acres are tied to acres with recent historic beneficial use irrigation rather than what was found in the specific year (2019) for which the data were tabulated or what was permitted. The definition of acres with recent historic beneficial use includes those acres that have been irrigated within the previous 5-year period or are expected to be developed and beneficially irrigated within the following 5-year period. William J. Kramber, Hal Anderson, and Michael Verdun of the Idaho Department of Water Resources. (1976/1992) Margie Wilkins, Michael Verdun, and Nick Van Dyke of the Idaho Department of Water Resources. (2009) Margie Wilkins, Ethan Geisler, and Matt Anders of the Idaho Department of Water Resources. (2019) Geospatial Technology Idaho Department of Water Resources GIS Analyst (208) 287-4800 (208) 287-6700 322 East Front Street Boise Idaho 83720 gisinfo@idwr.idaho.gov Geospatial Technology Idaho Bear River Basin irrigation Bear River Compact land cover water use land use depletion study Irrigation Bear River Compact Land Cover Idaho water use Bear River land use depletion study <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Access and Use Constraint: The Idaho Department of Water Resources is making this data available as a public service. The Idaho Department of Water Resources strives to ensure that all technical data and other information made available to the public is accurate, complete and in conformance with the Idaho Public Records Act. Neither the Department of Water Resources nor the State of Idaho, however, assumes any legal responsibility for the accuracy or completeness of the information contained on this site. Persons using information from this site for official purposes, or other purposes, for which accuracy and completeness are required, are hereby notified that they should first verify the information with the public records or other primary sources from which the information was obtained.</SPAN></P><P><SPAN>Please check sources, scale, accuracy, currentness and other available information. Please confirm that you are using the most recent copy of both data and metadata. Acknowledgement of IDWR in any products derived from this dataset is appreciated.</SPAN></P></DIV></DIV></DIV> "Idaho's system for monitoring water use in the Bear River Basin" Kramber, W.J., H. Anderson, M. Verdun, G. Austiguy, and B. Ondrechen Idaho Department of Water Resources Idaho Department of Water Resources document Geo Info Systems pp. 8-52 ESRI ArcGIS 10.0.0.2414 Procedures Used for 2019 determinations: see the 2023 Technical Memorandum to the Bear River Commission from the Technical Advisory Group for details 1. Utah provided a preliminary land classification for the entire Bear River Compact (BRC) area including Wyoming and Idaho as part of their annually published Water Related Land Use (WRLU) project. The Idaho portion of this dataset was used as a preliminary starting point with the recommendation and understanding that Idaho would verify land use classifications and line geometry based on its own internal decision-making processes. This "preliminary" dataset provided by Utah contained additional attributes not used by the Bear River commission. 2. The primary source of background imagery for line editing was National Agriculture Imagery Program (NAIP) imagery from 2019 (1-meter, true color and false color). 3. The primary source for determining irrigation status changes and depletions was National High Altitude Photography (NHAP) imagery from the 1980s. 4. The following attributes are of primary interest to the 2019 depletion study calculations: Landtype76 Landtype19 SUPP CHANGE_19 --- along with a number of additional attributes used to track the numerous reviews made during the analysis. These additional attributes are available on internal versions of the data and not available to the public. 5. Supporting datasets include: Landsat and Sentinel2 satellite imagery; NDVI created from 2019 Landsat imagery; National Agricultural Statistics Service (NASS) 2015-2019 Idaho Cropland Data Layer (30-meter resolution); National Hydrologic Database flowlines; black and white Digital Ortho Quarter Quads (DOQQs); US Fish & Wildlife Service Wetland map service; water right information available in the IDWR water right database prior to the Bear River Basin Adjudication. -------------------------------------------------------------- Procedures Used for 2009 determinations: 1. Common Land Unit (CLU) polygons of individual fields digitized by the Farm Service Agency (FSA) in 2005 were used as a starting point in line geometry edits. 1-meter NAIP imagery was used as the primary source of background imagery for line editing. NAIP imagery from 2004 (1-meter, true color), 2006 (2-meter, true color), and 2009 (1-meter, color infrared and true color) were also available. 2. The following attributes are of primary interest to the 2009 depletion study calculations: descript_1976 descript_2009 change_2009 3. 1976/1992 Landuse attributes (descript_1976 and land_type_1976) were initially assigned by overlaying a rasterized version of the 1976/1992 Bear River Basin landuse classification with the CLU polygons. The polygons were assigned a land_type value based on the majority zonal statistic of the rasterized 1976/1992 land classification. 2009 Landuse attributes (descript_2009 and land_type_2009) were set equal to 1976/1992 values initially, reviewed section by section, and edited as needed by photointerpretation of 2009 NAIP and 2009 Landsat imagery to indicate changes in landuse. 4. Supporting datasets include: NDVI created from 2009 Landsat imagery; National Agricultural Statistics Service (NASS) 2009 Idaho Cropland Data Layer (56-meter resolution); the 2005 North American Land Cover Database produced as a joint project by Canada, The United States, and Mexico (250-meter resolution); the 1992 National Land Cover Dataset (NLCD92) prepared by the USGS (30-meter resolution); National Hydrologic Database flowlines; black and white Digital Ortho Quarter Quads (DOQQs). -------------------------------------------------------------- Procedures Used for 1976/1992 determinations: 1. USGS 1:24,000-scale orthophotoquads (OQs) used as base maps. 2. 1976 1:120,000-scale color infrared (CIR) aerial photographs were used to develop the land use and land cover. 3. Mylar overlays were taped to the OQs and land use and land cover polygons were drawn on the mylar while interpreting the 1:120,000-scale CIR aerial photographs. 4. Land use changes between 1976 and 1990, for the Central Division, were interpreted from USDA ASCS 35mm color aerial slides collected the summer of 1990. These slides were projected onto the OQs and changes were drawn on the mylar overlays. 5. The land use and land cover interpretation was verified with the staff and/or directors of the USDA ASCS offices for Bear Lake, Franklin, Oneida, and Caribou counties. Plots were produced to verify the land use and land cover mapping both by the USDA ASCS field offices and by Idaho Department of Water Resources analysts. The district 11 watermaster also reviewed the maps. Areas of uncertainty were visited in the field. 6. Land use and land cover boundaries were manually digitized from the mylar overlays. Preliminary maps were plotted and checked for accuracy. Edits were made and final plots were produced at 1:100,000-scale. 7. Attributes for landuse: land_type description 1:water 2:wetlands/naturally subirrigated pasture and hay 3:irrigated cropland 4:nonirrigated cropland 5:urban 6:other 1 -112.558464 -111.007112 42.870407 41.974758 Idaho portion of the Bear River Compact. Idaho Department of Water Resources Administrative Basins 11, 13, and 15. 2015-04-01T00:00:00 2019-10-31T00:00:00 Geospatial Technology Section Idaho Department of Water Resources GIS Analyst (208) 287-4800 (208) 287-6700 322 East Front Street Boise Idaho 83720 gisinfo@idwr.idaho.gov Geospatial Technology Distribution Liability: The Idaho Department of Water Resources is making this data available as a public service. The Idaho Department of Water Resources strives to ensure that all technical data and other information made available to the public is accurate, complete and in conformance with the Idaho Public Records Act. Neither the Department of Water Resources nor the State of Idaho, however, assumes any legal responsibility for the accuracy or completeness of the information contained on this site. Persons using information from this site for official purposes, or other purposes, for which accuracy and completeness are required, are hereby notified that they should first verify the information with the public records or other primary sources from which the information was obtained. Acknowledgment of IDWR would be appreciated in any work derived from this dataset. Field boundaries depicted within this dataset are not to be used for legal purposes. The data was developed primarily for determining water used by irrigated agriculture in support of the Depletion Estimates of the Bear River Basin for the Bear River Compact. Visual inspection against imagery. Attribute assignments for land classification are determined using available Landsat and Sentinel2 satellite imagery as background reference. Landsat imagery is typically 30-meter (l5) or 15-meter (l7) resolution, Sentinel2 imagery is 10-meter resolution. National High Altitude Photography (NHAP) from the 1980s was used extensively to determine the irrigation status for the 1976 base map. National Agriculture Inventory Program (NAIP) imagery, Digital Ortho Photo Quadrangle (DOQQ) imagery, and other in-house, scanned aerial imagery is used for determining irrigation status and refining linework geometry. Hence, attribute accuracy is determined by the scale of those sources. Visual inspection against imagery and IDWR's water rights database. A topology check was performed to repair overlapping polygons and data gaps of consequential size. Overlapping polygons and data gaps of consequential size were minimized to the best of the analyst’s ability under existing time constraints. Positional Accuracy requirements are determined by its use in the Bear River Compact (BRC) depletion estimates and the Bear River Basin Adjudication (BRBA) process. Visual inspection against imagery and IDWR's water rights database. The Bear River Commission (BRC) requested that land be classified into six categories: 1. irrigated cropland 2. non-irrigated cropland 3. urban 4. water 5. wetlands/naturally subirrigated pasture and hay 6. other This analysis to determine depletion estimates relies on comparing 1976 and 2019 landtype classifications and noting areas of misclassifications in the original 1976 map data layer. Classifications are denoted by Landtype76 and Landtype19 columns. Comparing Landtype76 and Landtype19 along with water right database information (pre-adjudication)determines the Change19 column. Change19 is used to determine what land has come into production since 1976 and what 1976 irrigated land has gone out of production. STEP 1: IDWR began the 2019 Depletion Study analysis with the 2019 Water Related Land Use (WRLU) dataset provided by Utah as part of Utah's annual land use survey. Idaho GIS analysts digitized and incorporated additional rivers, roads, and urban areas into the dataset. Idaho also made edits to delineate where water right POU shapes overlap or divide field boundaries based on pre-adjudicated Bear River Basin water rights. Because of its high resolution, 1-meter 2019 NAIP imagery was used as the primary source of background imagery for line editing. In addition to information contained in IDWR's water rights database (pre-adjudication), 2015-2019 Landsat and/or Sentinel imagery were used as the primary source of background imagery for determining irrigation status and land classification. The National Agricultural Statistics Service's (NASS) Cropland Data Layer (CDL), the National Hydrologic Database (NHD), U.S. Fish & Wildlife Service wetlands data, and other vector and raster data sources were used in support of all land classification determinations. The National High Altitude Photography (NHAP) program - operational from 1980 to 1989 - was instrumental in determining the historical ground condition in order to verify 1976 land use classifications and to determine landuse changes. The in-house spatial datasets used to locate the place of use (POU) and point of diversion (POD) for all active water right applications, permits, rights, and transfers in basins 11, 13, and 15 provided justification for potentially reclassifying the original 1976 base map. The National High Altitude Photography (NHAP) program - operational from 1980 to 1989 - was instrumental in determining the historical ground condition in order to verify 1976 land use classifications and to determine landuse changes. 2022-05-02T00:00:00 Geospatial Technology Idaho Department of Water Resources GIS Analyst (208) 287-4800 (208) 287-6700 322 East Front Street Boise Idaho 83720 gisinfo@idwr.idaho.gov Geospatial Technology STEP 2: In the initial stages of the review, Idaho experimented with a Random Forest (RF) methodology to classify land use. RF uses the Normalized Difference Vegetation Index (NDVI), Landsat Satellite Thermal Band, and Sentinel Satellite Synthetic Aperture Radar (SAR) data as input. The output is a 30-meter raster. The Random Forest methodology uses training sites of known land use to determine land use over a larger area. Idaho used approximately 500 training sites to calibrate the Random Forest methodology for the 2019 Depletion Study. Initially, the 2019 land use classification was set to the classification determined by the random forest classification, but due to poor results of the Random Forest methodology, Idaho switched to a manual photointerpretation method to determine land use classifications. A methodical review was performed section by section through all townships using 2019 NAIP, 2019 Sentinel imagery, 2019 Landsat imagery, NDVI, and when appropriate other supplemental spatial information as noted above to determine the 2019 land use classification. Confidence in the accuracy of the RF methodology began to wane during this initial review, and Idaho chose to switch to manual photointerpretation to determine land use classifications. 2022-05-02T00:00:00 Geospatial Technology Idaho Department of Water Resources GIS Analyst (208) 287-4800 (208) 287-6700 322 East Front Street Boise Idaho 83720 gisinfo@idwr.idaho.gov Geospatial Technology STEP 3: Rasterize the following datasets: 1976/1992 base map polygons 2009 depletion study polygons 2019 Utah Water Related Land Use (WRLU) polygons 2019 Utah-determined irrigation method attribute from Utah's 2019 WRLU Service Areas in IDWR's water rights database resampled the Random Forest raster from 30m to 1m Overlay line geometry depicting field boundaries from STEP 1. Spatial Analyst > Zonal > zonal statistics as table Assign raster value based on majority statistic for rasterized datasets listed above The Zonal Statistics tool eliminates multiple land use types (speckling) within an agricultural field polygon by assigning the polygon the land use of the majority of the pixels falling within the polygon. The output of the Zonal Statistics tool was a 2019 polygon dataset with an attribute table containing four additional columns with the land use from the 1976 classification, 2009 classification, 2019 WRLU classification, 2019 WRLU irrigation method contained within the Utah WRLU classification, and RF classification. Having an attribute value based on rasterized data for various datasets for various land classifications minimizes the need for constantly turning on and off layers within the GIS and allows for easier tabular comparisons and querying of the vaarious datasets. 2022-05-02T00:00:00 Geospatial Technology Idaho Department of Water Resources GIS Analyst (208) 287-4800 (208) 287-6700 322 East Front Street Boise Idaho 83720 gisinfo@idwr.idaho.gov Geospatial Technology STEP 4: Review and edit classifications section by section for every Township. Edit Landtype19 values as needed using photointerpretation of 2019 NAIP, 2019 satellite imagery, and other supporting datasets that can indicate changes in landuse as listed in the 2023 Technical Memorandum to the Bear River Commission from the Technical Advisory Group. After review and input from the Bear River Commission, the GIS group within the Technical Advisory Committee determined that the reported changes in irrigated acres should be tied to acres with recent historic beneficial use irrigation rather than what was found in the specific year (2019) for which the data were tabulated or what was permitted. The definition of acres with recent historic beneficial use includes those acres that have been irrigated within the previous 5-year period or are expected to be developed and beneficially irrigated within the following 5-year period. 2022-05-02T00:00:00 Geospatial Technology Idaho Department of Water Resources GIS Analyst (208) 287-4800 (208) 287-6700 322 East Front Street Boise Idaho 83720 gisinfo@idwr.idaho.gov Geospatial Technology STEP 5: A water right search was conducted as supporting evidence for areas of added depletion. Field verification was completed during the summer of 2021 in targeted areas where imagery or water right review was inconclusive. 2019 water right review included water right licenses and permits with priorities from January 1, 1976, thru December 31, 2019, within the Idaho portion of the Bear River Basin. Information from each water right file was compared to the 1976 base maps and 2019 imagery to determine whether new or supplemental irrigation should be accounted for. Acres considered to be new irrigation from water right records were then compared to those acres GIS staff considered new irrigation from imagery review. Any acres not overlapping were then given a second review by GIS staff. Acres considered irrigated in 1976 and 2019, with a recorded pre-1976 priority water right and post-1976 priority water right, were counted as supplemental. Acres considered irrigated in 1976 and 2019, but having only a post 1976 water right, were considered a “getting legal” action and not counted. Acres covered by a post-1976 water right, but showing no irrigation or development, were not counted. A more detailed report on Idaho’s efforts to update the irrigated acres and changes since 1976 can be found in the Technical Advisory Group's (TAC) 2023 Technical Memorandum to the Bear River Commission. 2022-05-02T00:00:00 Geospatial Technology Idaho Department of Water Resources GIS Analyst (208) 287-4800 (208) 287-6700 322 East Front Street Boise Idaho 83720 gisinfo@idwr.idaho.gov Geospatial Technology The data layer consists of polygon features attributed by GIS analysts based on visual interpretation of remote sensing and aerial imagery as well as supplemental information provided in the water rights database. Attribute assignments for irrigation status are determined using available Landsat and Sentinel2 satellite imagery as background reference. Landsat imagery is typically 30-meter (l5) or 15-meter (l7) resolution, Sentinel2 imagery is 10-meter resolution. National High Altitude Photography (NHAP) from the 1980s was used extensively to determine the irrigation status for the 1976 base map and therefore determine depletion estimates. National Agriculture Inventory Program (NAIP) imagery, Digital Ortho Photo Quadrangle (DOQQ) imagery, and other in-house, scanned aerial imagery is used for determining irrigation status and refining linework geometry. Visual inspection against imagery and IDWR's water rights database. 63462 dataset ESRI 10.0.0 BRC_2019 Feature Class 63462 6-class classification IDWR and Bear River Compact OBJECTID Internal feature number. Sequential unique whole numbers that are automatically generated. ESRI Sequential unique whole numbers that are automatically generated. OBJECTID OID 4 0 0 Shape Feature geometry. Coordinates defining the features. ESRI Coordinates defining the features. Shape Geometry 0 0 0 Division Division String 15 0 0 Compact divisions in Idaho are the Central and Lower. A surface water boundary, between the Central and Lower divisions, was developed to distinguish lands irrigated by surface water diverted from the Central Division but are located in the Lower Division (below Stewart Dam). The area mostly west of Stewart Dam designates lands located outside the Central Division but are irrigated by surface water originating from the Bear River in the Central Division. Division and subbasin boundaries were edited to follow the PLSS QQ lines so each QQ and water right clearly falls into one division and subbasin. Biennial report from the April 1992 Bear River Commission meeting minutes subbasin subbasin String 25 0 0 Subbasin boundaries were taken from a research report (#125 by Hill et al.), transferred to 1:100,000 topographic maps, and manually digitized. Subbasins are those areas described in report #125 for which unique consumptive water use was developed. Division and subbasin boundaries were edited to follow the PLSS QQ lines so each QQ and water right clearly falls into one division and subbasin. Biennial report from the April 1992 Bear River Commission meeting minutes Landtype76 Text description of landcover type in 1976 irrigated cropland = irrigated agriculture lands non-irrigated cropland = includes dryland agriculture wetlands/naturally subirrigated pasture and hay = both agricultural and non-agricultural land that is influenced by a high-water table in proximity to a waterbody water = open water, large ponds urban = homesteads, developed areas other = roads, right-of-way, rangeland, canals IDWR and BRC Landtype76 String 50 0 0 ACRES Polygon area in acres. IDWR ACRES Double 8 0 0 Landtype19 Landtype19 String 50 0 0 Text description of landcover type in 2019 irrigated cropland = irrigated agriculture lands non-irrigated cropland = includes dryland agriculture wetlands/naturally subirrigated pasture and hay = both agricultural and non-agricultural land that is influenced by a high-water table in proximity to a waterbody water = open water, large ponds urban = homesteads, developed areas other = roads, right-of-way, rangeland, canals IDWR and BRC SUPP SUPP String 3 0 0 Initial determination of whether the polgon has a supplemental water right IDWR NEW POST76 WtrRt only, no PRE76 WtrRt IDWR YES PRE76 WtrRt and POST 76 WtrRt, must have both (field does have a supplemental water right) and Landtype19 = "IRRIGATED CROPLAND" IDWR WtrRts WtrRts String 50 0 0 Rasterized water right POUs Overlayed with field polygons and zonal statistics (majority) IDWR NO WtrRts no water rights cover the polygon IDWR PRE76 WtrRt the majority of the polygon is covered by a pre-1976 water right IDWR POST76 WtrRt the majority of the polygon is covered by a post-1976 water right IDWR PRE/POST WtrRt the majority of the polygon is covered by both a pre-1976 water right and a post-1976 water right IDWR OUTSIDE 2009 BOUNDARY the majority of the polygon is outside the boundary of the BRC IDWR CHANGE_19 CHANGE_19 String 10 0 0 Final designation for estimating depletion acres based on land classification and a review of the pre-adjudicated water rights. IDWR ADDED new depletion acres; land brought into production since 1976; has a post76 WtrRt but not a pre76 WtrRt IDWR SUBTRACTED area brought out of production by new urban or left to go fallow longterm; converted land use IDWR RECLASS features or infrastructure that existed in 1976 but were not delineated: refined roads, water, urban, etc; misclassification on the 1976 base map IDWR CHECK_01 CHECK_01 String 5 0 0 CHECK_02 CHECK_02 String 10 0 0 CHECK_03 CHECK_03 String 20 0 0 CHECK_04 CHECK_04 String 35 0 0 CHECK_05 CHECK_05 String 30 0 0 CHECK_06 CHECK_06 String 15 0 0 zstat_1976 zstat_1976 String 50 0 0 zstat_2009 zstat_2009 String 50 0 0 zstat_WRLU zstat_WRLU String 50 0 0 zstat_METH zstat_METH String 50 0 0 zstat_RF19 zstat_RF19 String 50 0 0 IDWR_Div IDWR_Div String 25 0 0 Internal description used at IDWR to specify with detail the various Divisions: Central; Central-Bear-Above, Central-Bear-Below, Lower IDWR IDWR_sub IDWR_sub String 30 0 0 Internal description used at IDWR to specify with detail the various subbasins: Bear Lake, Bear Lake – Above Stewart Dam, Bear Lake – Below Stewart Dam, Cache Valley, Cokeville, Malad, Oneida, Soda Springs, Thomas Fork, Tremonton IDWR CHECK_07 CHECK_07 String 100 0 0 CHECK_08 CHECK_08 String 20 0 0 zstat_SA zstat_SA SmallInteger 2 0 0 CHECK_09 CHECK_09 String 20 0 0 SUPPLEMENTAL SUPPLEMENTAL String 15 0 0 Final determinations of supplemental acres used in calculating depletion. IDWR comments comments String 35 0 0 Shape_Length Length of feature in internal units. ESRI Positive real numbers that are automatically generated. Shape_Length Double 8 0 0 Shape_Area Area of feature in internal units squared. ESRI Positive real numbers that are automatically generated. 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