Erosion hazards of Monterey County, California

Rosenberg, Lewis I. County of Monterey, Environmental Resource Policy Department 2001 Erosion hazards of Monterey County, California vector digital data withheld County of Monterey 2001 21st Century General Plan Update http://www.co.monterey.ca.us/gpu/ Erosion This map depicts the relative soil erosion hazard for Monterey County, California. Erosion can be defined as the wearing away of the land surface by flowing water, waves, or wind, or by such process as mass wasting and corrosion. Water and wind erosion are important in assessing the health of the soil and in assessing the soil's potential for different uses. Removal of increasing amounts of soil increasingly alters various properties and capabilities of the soil. Properties and qualities affected include bulk density, permeability, organic matter content, tilth, and can degrade surface water quality. In Monterey County, farming is a major source of employment and revenue; hence, protecting the county's soil resources is important. The purpose of this map is to provide a comparison of relative soil erosion hazards for regional planning studies. en 2001 publication date In work Irregular -121.993505 -120.211937 36.940151 35.757938 5686608.380000 6202199.625000 1808433.523000 2227680.495000 None soil erosion agriculture None Aromas Arroyo Seco Big Sur Bolsa Knolls Bradley Cachagua California Carmel Highlands Carmel Valley Carmel Valley Village Carmel-By-The-Sea Castroville Del Rey Oaks Gonzales Greenfield Jamesburg Jolon King City Lockwood Lucia Marina Monterey Monterey County Moss Landing Pacific Grove Pajaro Parkfield Pebble Beach Prunedale Salinas San Ardo San Lucas Sand City Seaside Soledad Spreckels Tassajara Hot Springs United States Contact the Monterey County Environmental Resource Policy Department. These data may not be distributed without the written permission of the County of Monterey. Lew Rosenberg Consulting Geologist mailing address

P.O. Box 183

Templeton CA 93465 (805) 434-1750 (805) 434-1750 Lrosenberg@thegrid.net Monday to Friday, 8 AM to 5 PM, Pacific Time ESRI ArcCatalog 9.0.0.535 Feature Class All attributes created during the creation process were verified by displaying the lines in both the database and the spatial coverage, but no formal tests were performed. These data are believed to be logically consistent, although no tests were performed. The file contains complete coverage for Monterey County. Subjective hazard ratings are from Cook (1978). Soil polygons are derived from the U.S. Department of Agriculture, Natural Resources Conservation Service SSURGO database for Monterey County. This file uses 1:24,000 scale mapping by the NRCS. The following accuracy report is from their SSURGO metadata for Monterey County: The accuracy of these digital data is based upon their compilation to base maps that meet National Map Accuracy Standards. The difference in positional accuracy between the soil boundaries and special soil features locations in the field and their digitized map locations is unknown. The locational accuracy of soil delineations on the ground varies with the transition between map units. For example, on long gently sloping landscapes the transition occurs gradually over many feet. Where landscapes change abruptly from steep to level, the transition will be very narrow. Soil delineation boundaries and special soil features generally were digitized within 0.01 inch of their locations on the digitizing source. The digital map elements are edge matched between data sets. The data along each quadrangle edge are matched against the data for the adjacent quadrangle. Edge locations generally do not deviate from centerline to centerline by more than 0.01 inch. U.S. Department of Agriculture, Natural Resources Conservation Service 19990316 Soil Survey Geographic (SSURGO) database for Monterey County, California vector digital data Fort Worth, TX U.S. Department of Agriculture, Natural Resources Conservation Service ca053 http://www.ftw.nrcs.usda.gov/ssur_data.html 24000 online 19990316 publication date NRCS (1999) Locations and types of soils in Monterey County. Cook, T.D 19780000 Soil survey of Monterey County, California U.S. Department of Agriculture, Soil Conservation Service 229 p. 24000 paper 19780000 publication date Cook (1978) Subjective erosion hazard ratings for the soil groups in the USDA soil survey of Monterey County, California. Soils are rated as to their erosion hazard potential in the Soil Survey of Monterey County, California (Cook, 1978). Cook classified the erosion potential into several classes, ranging from very high to minimal based on detailed field mapping and laboratory testing. For this study, these groups were combined into high, moderate, and low categories. The Soil Survey Geographic database for Monterey County database (NRCS, 1999) includes georeferenced digital soil mapping units. A table of the soil units in Monterey County and their subjective soil erosion was manually created and saved as a tab-delimited text file. This text file was joined to the SSURGO DBF file using ArcView 3.2a. The resultant polygons were dissolved into high, moderate, and low classes. withheld withheld 20010322 Dataset copied. withheld Dataset copied. withheld Metadata imported. withheld 20041227 14224800 Dataset copied. withheld 20080806 12454200 Vector Simple FALSE 3684 TRUE FALSE coordinate pair 0.001024 0.001024 survey feet North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 GCS_North_American_1983 NAD_1983_StatePlane_California_IV_FIPS_0404_Feet 0.000010 Explicit elevation coordinate included with horizontal coordinates MNTRY_CO.Erosion Feature Class 3684 RATING Erosion hazard rating author high Area of high erosion hazard. Includes areas classified by Cook (1978) as high and very high, high or very high, high to very high, moderate to high, slight to high, very high, and high author moderate Area of moderate erosion hazard Includes areas classified by Cook (1978) as moderate, and slight to moderate author low Area of low erosion hazard. Includes areas classified by Cook (1978) as minimal, minimal to slight, none, and slight author variable Area of variable erosion hazard. Includes areas mapped by Cook (1978) as variable. author RATING String 16 0 0 ER_LABEL Erosion hazard rating label author H high author M moderate author L low author V variable author ER_LABEL String 1 0 0 OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. OBJECTID OID 4 10 0 SHAPE Shape Geometry 4 0 0 Feature geometry. ESRI Coordinates defining the features. Shape Feature geometry. ESRI Coordinates defining the features. SHAPE.AREA Double 0 0 0 SHAPE.AREA SHAPE.LEN Double 0 0 0 SHAPE.LEN Shape Geometry 4 0 0 Feature geometry. ESRI Coordinates defining the features. Monterey County Environmental Resource Policy Department Database coordinator mailing address

P.O. Box 180

Salinas CA 93902 (831) 755-5353 (831) 796-3062 Monday to Friday, 8 AM to 5 PM, Pacific Time This dataset was prepared in support of the County of Monterey 21st Century General Plan Update. This database is intended for regional planning purposes and not for site-specific evaluation. Information in this data set is preliminary in nature. This information is provided with the understanding that it is not guaranteed to be correct or complete and conclusions drawn from such information, whether from individual use or aggregate use with other data, are the responsibility of the user. 14.832 Contact the Monterey County Environmental Resource Policy Department for a printed copy of the erosion hazards map or for an ESRI shapefile of the erosion database. For those users that do not have ArcView or ARC/INFO, ESRI provides a free GIS data viewer, ArcExplorer, that can be downloaded from their website at: http://www.esri.com/software/arcexplorer/index.html ArcExplorer is currently only supported on the Windows 95/98 or Windows NT platforms. 20041227 20010503 Lew Rosenberg Consulting Geologist mailing address

P.O. Box 183

Templeton CA 93465 (805) 434-1750 (805) 434-1750 Lrosenberg@thegrid.net FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time http://www.esri.com/metadata/esriprof80.html ESRI Metadata Profile en 20190219 14013700 FALSE 20150211 16412100 20150211 16412100 Erosion 002 5686608.380000 6202199.625000 1808433.523000 2227680.495000 1 Projected GCS_North_American_1983 Linear Unit: Foot_US (0.304801) NAD_1983_StatePlane_California_IV_FIPS_0404_Feet <ProjectedCoordinateSystem xsi:type='typens:ProjectedCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/10.1'><WKT>PROJCS["NAD_1983_StatePlane_California_IV_FIPS_0404_Feet",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Lambert_Conformal_Conic"],PARAMETER["False_Easting",6561666.666666666],PARAMETER["False_Northing",1640416.666666667],PARAMETER["Central_Meridian",-119.0],PARAMETER["Standard_Parallel_1",36.0],PARAMETER["Standard_Parallel_2",37.25],PARAMETER["Latitude_Of_Origin",35.33333333333334],UNIT["Foot_US",0.3048006096012192],AUTHORITY["EPSG",2228]]</WKT><XOrigin>-116466200</XOrigin><YOrigin>-92735300</YOrigin><XYScale>4000</XYScale><ZOrigin>0</ZOrigin><ZScale>1</ZScale><MOrigin>0</MOrigin><MScale>1</MScale><XYTolerance>0.002</XYTolerance><ZTolerance>0.002</ZTolerance><MTolerance>1.9999999999999998e-005</MTolerance><HighPrecision>true</HighPrecision><WKID>102644</WKID><LatestWKID>2228</LatestWKID></ProjectedCoordinateSystem> 1.0 Esri ArcGIS 10.2.2.3552 Erosion 5686608.38 6202199.625 2227680.495 1808433.523 1 -121.993505 -120.211937 36.940151 35.757938 1 1 -121.993505 -120.211937 36.940151 35.757938 ISO 19115 Geographic Information - Metadata DIS_ESRI1.0 dataset 002 withheld Feature Class Feature Class NAD_1983_StatePlane_California_IV_FIPS_0404_Feet EPSG 8.2.6 3684 20150211