California Department of Fish and Wildlife The Nature Conservancy, California California Department of Water Resources 20180401 1 Vector digital data The Natural Communities Commonly Associated with Groundwater (NCCAG) Wetland dataset is a compilation of regularly flooded natural wetlands and riverine areas as well as springs and seeps extracted from 3 publicly available federal data sets. The extracted wetland and stream features are commonly associated with groundwater due to their flooding frequency or classification as a perennial hydrologic feature. Springs and seeps are commonly associated with groundwater because they are locations where groundwater naturally emerges at the ground surface. The purpose of the NCCAG Wetland data set is to identify wetlands, streams, seeps, and springs that are commonly associated with groundwater in Californias 517 Groundwater Basins defined in Bulletin 118 (2016). The associated data are considered DWR enterprise GIS data, which meet all appropriate requirements of the DWR Spatial Data Standards, specifically the DWR Spatial Data Standard version 2.1, dated March 9, 2016. The features in the data set were not created by DWR. Data were originally developed by U.S. Fish and Wildlife Service (USFWS), U.S. Geological Survey (USGS), and Andy Zdon and Associates, Inc. Features in the NCCAG dataset were merely extracted from these sources under a set of defined rules and procedures. DWR makes no warranties or guarantees — either expressed or implied — as to the completeness, accuracy, or correctness of the data. DWR neither accepts nor assumes liability arising from or for any incorrect, incomplete, or misleading subject data. The official DWR subject matter expert for this data set is Amy Lyons, who may be contacted at 530-528-7439, or at amy.lyons@water.ca.gov. The official DWR GIS Steward for this data set is Wyatt Arnold, who may be contacted at 916-653-4849, or at wyatt.arnold@water.ca.gov. Comments, problems, improvements, updates, or suggestions should be forwarded to the subject matter expert or GIS Steward as available and appropriate. 19720101 20150101 See i02_NCCAG_Sources table for source data publication date Complete As needed -124.456091 -113.601437 42.016617 32.435423 ISO 19115 Topic Categories groundwater hydrogeology wetlands habitat biota conservation environmental resources None ecosystem groundwater wetlands Geographic Names Information System california None decadal None This dataset does not prove or make any claim about the nature and/or extent of ecosystem groundwater dependence for any mapped location. Positive identification of a groundwater dependent ecosystem requires detailed understanding of groundwater levels, hydrology, and geology of an area which is not within the scope or purpose of this dataset. The data in the NCCAG dataset do not preempt the authority of local land use agencies.The data in the NCCAG dataset do not alter or infringe upon existing water rights. California Department of Water Resources Amy Lyons Environmental Scientist mailing and physical

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Red Bluff CA 96080 US (530) 528-7439 amy.lyons@water.ca.gov California Department of Water Resources Wyatt Arnold Engineer, Water Resources mailing and physical

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Sacramento CA 95814 US 916-653-4849 wyatt.arnold@water.ca.gov California Department of Water Resources Amy Lyons Environmental Scientist mailing and physical

2440 Main St.

Red Bluff CA 96080 US (530) 528-7439 amy.lyons@water.ca.gov https://www.water.ca.gov/-/media/DWR-Website/Web-Pages/Programs/Groundwater-Management/Data-and-Tools/Images/Data-Tools-Thumbs/NCCAG_Thumb.png NCCAG dataset full extent map thumbnail PNG California Department of Water Resources California Department of Fish and Wildlife The Nature Conservancy, California United States government classification system Unclassified No security restrictions Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.5.1.7333 See i02_NCCAG_Sources table for data source attribute accuracy information and URL to source full metadata No topological tests performed. Seeps and springs were extracted from the Mojave Desert Springs and Waterholes Survey (Andy Zdon & Associates, Inc.) and buffered by 15.42 meters (50 feet) to convert the point data to polygon data. All were included in the NCCAG Wetlands dataset. Seeps and springs were extracted from the National Hydrography Dataset (NHD) for California (U.S. Geological Survey (USGS)) and buffered by 15.42 meters (50 feet) to convert the point data to polygon data. All were included in the NCCAG Wetlands dataset. The U.S. Fish and Wildlife (USFWS) National Wetland Inventory (NWI), Version 2, was intersected with the NWI Project Metadata Layer to include the year of the aerial photo used for wetland mapping (U.S. Fish and Wildlife Service 2016). Each record in the NWI database includes a wetland classification code based on the Cowardin wetland classification (Cowardin et al. 1979). A spreadsheet tool was used to decode wetland types used in California and provide text descriptions of the wetland type and each modifier used. The following wetland types were excluded from the database: Wetlands in the marine or estuarine system; Wetlands in the riverine system and intermittent sub-system; Wetlands with the code used to map vernal pools (i.e., “PEM1Ai”, “PEM1Ci”, “PEM1Ei”); Wetlands special modifiers indicating human modification (i.e., f: “Farmed”; h: “Diked/Impounded”; r: “Artificial Substrate”; x: “Excavated”; s: “Spoil”); Wetlands with water regime modifiers that indicated they are artificially, intermittently or temporarily flooded (i.e., K “Artificially Flooded”; J: “Nontidal, Intermittently Flooded”; A: “Nontidal, Temporarily Flooded”); Wetlands with water regime modifiers that indicate the flooding is a result of tidal influence (i.e., Q: “Freshwater Tidal, Regularly Flooded”; S: “Freshwater Tidal, Temporarily Flooded”) See i02_NCCAG_Sources for horizontal accuracy reports characterizing each data source. 12.2 Lowest horizontal positional accuracy of all data sources: U.S. Fish and Wildlife Service (USFWS) National Wetland Inventory ) mapped at 1:24,000 scale by USGS 7.5-minute quadrangle. As applied to the USGS 7.5-minute quadrangle topographic map, the horizontal accuracy standard requires that the positions of 90 percent of all points tested must be accurate within 1/50th of an inch (0.05 centimeters) on the map. At 1:24,000 scale, 1/50th of an inch is 40 feet (12.2 meters). In areas where multiple wetland data overlap, the preference order for the wetlands data was: 1. Mojave Desert Springs and Waterholes Survey; 2. NHD Seeps and Springs; 3. NWI Wetlands. Each data source was clipped to the Bulletin 118 Interim Update 2016 Groundwater Basin boundaries (i08_B118_CA_GroundwaterBasins). Any source features underlying agricultural areas identified in the 2014 statewide Crop Mapping dataset released in 2017 (i15_Crop_Mapping_2014) were removed from the NCCAG dataset. With the exception of narrow riparian corridors, any source features underlying urban areas identified in a compilation of DWR County Land Use Surveys beginning in 2000 through 2014 and the 2014 US Department of Agriculture Cropland Data Layer were removed from NCCAG dataset. In narrow riparian corridors located in mapped urban areas, source features underlying urban areas yet within 100 meters of rivers and waterbodies as mapped in the NHDPlus V2 dataset were retained. A high-level review of features retained in the dataset following processes described above was conducted to remove mapping errors and any features that were most likely dependent on surface water sources. Some of the processing steps mentioned above altered the geometry of the vegetation and wetland polygons to make them smaller than the minimum mapping unit for the source dataset. All features remaining in the NCCAG dataset smaller than the minimum mapping unit of its respective data source were removed. If there was no minimum mapping unit published in the metadata or associated reports for the source dataset, a minimum mapping unit of 1,000 m2 (~1/4 acre) was applied. In some cases, the data source included vegetation or wetland features smaller than the published minimum mapping unit. These features were retained in the NCCAG dataset if they were identical to the polygon in the source dataset (i.e. they had not been modified by the processing steps listed above). 20180101 The Nature Conservancy Kirk Klausmeyer Senior Spatial Data Scientist mailing

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San Francisco CA 94105 (415) 777-0487 kklausemeyer@tnc.org Vector GT-polygon composed of chains 78810 NAD 1983 California Teale Albers 34.0 40.5 -120.0 0.0 0.0 -4000000.0 coordinate pair 0.0001 0.0001 meter D North American 1983 GRS 1980 6378137.0 298.257222101 ds2789 ORIGINAL_CODE Original code for the wetland type. Varies; see i02_NCCAG_Sources Variable characters 19720101 20150101 Unknown Shape Feature geometry. ESRI Coordinates defining the features. 19720101 20150101 None planned OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. 19720101 20150101 None planned Shape_Length Length of feature in internal units. ESRI Positive real numbers that are automatically generated. 19720101 20150101 None planned LAST_MODIFIED_DATE Date record was last modified. California Department of Water Resources 1012018 1012024 mmddyyyy 19720101 20150101 None planned DATE_DATA_REFERS_TO Year the imagery was taken for mapping this wetland polygon (note: defaults to first day of year). Varies; see i02_NCCAG_Sources 1011972 1012015 mmddyyyy 19720101 20150101 Unknown WETLAND_NAME Name of the mapped wetland type. For each wetland type in the i02_NCCAG_Wetland feature class, each letter from the Cowardin wetland classification was decoded based on the U.S Fish and Wildlife NWI Wetlands and Deepwater Map Code Diagram and compiled into one field (WETLAND_NAME). All seeps and springs were given the WETLAND_NAME “Seeps and Springs”. California Department of Water Resources Variable characters 19720101 20150101 Unknown COMMENTS Any user-provided comments. California Department of Water Resources Variable characters 19720101 20150101 None planned SOURCE_NAME Source name CITATION Citation REPORT_URL Report URL DATA_ACCESS_URL URL to access the data Shape_Area Area of feature in internal units squared. ESRI Positive real numbers that are automatically generated. 19720101 20150101 None planned N/A N/A California Department of Water Resources mailing and physical

901 P St

Sacramento CA 95814 US (916) 653-5791 sgmps@water.ca.gov See access and use constraints information. 20180821 California Department of Water Resources Wyatt Arnold Engineer, Water Resources mailing and physical

901 P St

Sacramento CA 95814 US 916-653-4849 wyatt.arnold@water.ca.gov FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 local time