Drought and Water Shortage Risk: Small Suppliers and Rural Communities (Version 2021)

Description

Per California Water Code Section 10609.80 (a), DWR has released an update to the indicators analyzed for the rural communities water shortage vulnerability analysis and a new interactive tool to explore the data. This page remains to archive the original dataset, but for more current information, please see the following pages: - https://water.ca.gov/Programs/Water-Use-And-Efficiency/SB-552/SB-552-Tool - https://data.cnra.ca.gov/dataset/water-shortage-vulnerability-technical-methods - https://data.cnra.ca.gov/dataset/i07-water-shortage-vulnerability-sections - https://data.cnra.ca.gov/dataset/i07-water-shortage-social-vulnerability-blockgroup This dataset is made publicly available pursuant to California Water Code Section 10609.42 which directs the California Department of Water Resources to identify small water suppliers and rural communities that may be at risk of drought and water shortage vulnerability and propose to the Governor and Legislature recommendations and information in support of improving the drought preparedness of small water suppliers and rural communities. As of March 2021, two datasets are offered here for download. The background information, results synthesis, methods and all reports submitted to the legislature are available here: https://water.ca.gov/Programs/Water-Use-And-Efficiency/2018-Water-Conservation-Legislation/County-Drought-Planning Two online interactive dashboards are available here to explore the datasets and findings. https://dwr.maps.arcgis.com/apps/MapSeries/index.html?appid=3353b370f7844f468ca16b8316fa3c7b The following datasets are offered here for download and for those who want to explore the data in tabular format. (1) Small Water Suppliers: In total, 2,419 small water suppliers were examined for their relative risk of drought and water shortage. Of these, 2,244 are community water systems. The remaining 175 systems analyzed are small non-community non-transient water systems that serve schools for which there is available spatial information. This dataset contains the final risk score and individual risk factors for each supplier examined. Spatial boundaries of water suppliers' service areas were used to calculate the extent and severity of each suppliers' exposure to projected climate changes (temperature, wildfire, and sea level rise) and to current environmental conditions and events. The boundaries used to represent service areas are available for download from the California Drinking Water System Area Boundaries, located on the California State Geoportal, which is available online for download at https://gispublic.waterboards.ca.gov/portal/home/item.html?id=fbba842bf134497c9d611ad506ec48cc (2) Rural Communities: In total 4,987 communities, represented by US Census Block Groups, were analyzed for their relative risk of drought and water shortage. Communities with a record of one or more domestic well installed within the past 50 years are included in the analysis. Each community examined received a numeric risk score, which is derived from a set of indicators developed from a stakeholder process. Indicators used to estimate risk represented three key components: (1) the exposure of suppliers and communities to hazardous conditions and events, (2) the physical and social vulnerability of communities to the exposure, and (3) recent history of shortage and drought impacts. The unit of analysis for the rural communities, also referred to as "self-supplied communities" is U.S. Census Block Groups (ACS 2012-2016 Tiger Shapefile). The Census Block Groups do not necessarily represent socially-defined communities, but they do cover areas where population resides. Using this spatial unit for this analysis allows us to access demographic information that is otherwise not available in small geographic units.

Resources

Name Format Description Link
53 This file contains drought and water shortage risk scores for small water systems (community water systems and schools). This workbook includes underlying risk factors used to calculate risk scores, and associated data dictionary. Each record contains the attributes of the water supplier examined (e.g., county, type of water system, name, public water system identification number) and the final risk scores that range from 0 to 100, with 100 as the highest risk and 0 as the lowest risk. Data of underlying risk factors are included, in both units of the original data and rescaled and/or normalized scores that range from zero to one. Please see methods report for full technical description of each indicator, including the origin of the source data and the processing steps conducted. Methods and report available for download at: https://water.ca.gov/Programs/Water-Use-And-Efficiency/Making-Conservation-a-California-Way-of-Life/County-Drought-Planning. Link to access the interactive online tool to explore the underlying risk indicators for each water system is posted at the same page: https://dwr.maps.arcgis.com/apps/MapSeries/index.html?appid=3353b370f7844f468ca16b8316fa3c7b To use this dataset in ArcGIS, please download Water System boundaries (as a single shapefile) from: https://gis.data.ca.gov/datasets/fbba842bf134497c9d611ad506ec48cc_0, then open the shapefile in ArcGIS and relate it with the Join tool to this data file in the workbook here using the PWSID attribute as the join field. https://data.cnra.ca.gov/dataset/fb6e8009-141c-4f92-8962-6f5cdfa5d794/resource/bcf7cd12-15ae-4beb-b537-4a98a195d354/download/compall_sws0100120.xlsx
53 This file contains drought and water shortage risk scores of self-supplied communities (also referred to as "rural communities") as calculated pursuant to CWC Section 10609.42 and as conducted through the stakeholder process between 2018 and 2020. Each record contains the US Census Block Group identification number (GEOID) examined, the associated scores for each Block Group examined, the county where each Block Group is located in and the name of a nearby place. The risk score ranges from 0 to 100, where 100 is the highest risk. This is a rescaled risk score, which means that all numeric scores are relative to the other communities examined in California. Please see methods report for full technical description of each indicator, including the origin of the source data and the processing steps conducted. Individual indicators underlying the risk score can be viewed in the Risk Explorer Tool , accessible via the link posted here: https://water.ca.gov/Programs/Water-Use-And-Efficiency/Making-Conservation-a-California-Way-of-Life/County-Drought-Planning . Tabular data file can be viewed in a ArcGIS format (map) by relating the GEOID attribute to the GEOID in the US Census Tiger Shapefile for ACS 2012-2016 (block groups). To associate this data in ArcGIS to a map, please go here to download US Census block groups for California: https://www.census.gov/cgi-bin/geo/shapefiles/index.php?year=2017&layergroup=Block+Groups https://data.cnra.ca.gov/dataset/fb6e8009-141c-4f92-8962-6f5cdfa5d794/resource/cb14d3f2-28b2-4027-814b-ea54e9bb937c/download/rcrisk_102920.xlsx

Tags

  • drought
  • risk
  • small-water-suppliers
  • domestic-wells
  • rural-communities
  • california
  • climate-change
  • california-department-of-water-resources

Topics

Categories