Depth to Water contours

This shapefile contains depth-to-groundwater contours for the shallow aquifer of the Chino Basin for spring 2010 in feet below ground-level. Depth-to-groundwater determined by subtracting a groundwater level elevation raster from a USGS 10m Digital Elevation Model. The depth-to-groundwater contours were generated using a raster-contouring tool in the Spatial Analyst extension of ESRI's ARCVIEW 10, and were then generalized and smoothed. Groundwater-levels were estimated based on interpolations made using an Ordinary Kriging model,. The inputs to the model were groundwater-level measurements and points derived from groundwater-level elevation contours. Contours of groundwater-level elevation were created by hand, digitized, and included in Exhibit 22 of the biennial State of the Basin Report (2010) for the Chino Basin Watermaster. Due to variations in local topography and the scale at which the groundwater-level elevation contours were created, the contours contained in this shapefile should be considered generalized representations of depth to groundwater at any given location within the Chino Basin.

SAWPA - Groundwater Contours for Santa Ana Watershed Groundwater Management Zones as calculated from AWQ Report for the period 1987-2006. Elevation data is in Feet.

Data currency - SAWPA - 1987 - 2006. OCWD portion - 1980. Chino Basin - Spring 2010

Currency of updates - Yet to be determined

Expected next update - Yet to be determined

(a) Content is provided for informational purposes only. You should exercise judgment in your use of this Content. (b) By using the Content, you do not receive any, and Wildermuth Environmental and/or Chino Basin Watermaster retain all ownership rights in the Content. You may not use, access or allow others to use or access the Content unless you have been specifically permitted to do so by Wildermuth Environmental or by Chino Basin Watermaster, in a separate agreement. (c) Use of the Content is not intended for design. No warranty expressed or implied is made regarding the accuracy or utility of these data for any other purpose other than that stated in the published report in which these data were published, nor shall the act of distribution of these data constitute any such warranty. (d) Wildermuth Environmental and the Chino Basin Watermaster assume no legal responsibility for the user's reliance, use, or interpretation of the data provided, and shall not be liable for any loss or injury resulting from reliance upon the Content.

Per SAWPA - DTW Contours are for Planning use only.