Skip Links

USGS - science for a changing world

Scientific Investigations Report 2009–5208

>> Pubs Warehouse > Scientific Investigations Report 2009–5208

Shallow Groundwater Movement in the Skagit River Delta Area, Skagit County, Washington

Table 2. Fitted regression coefficients and calculated hydrogeologic parameters for wells in the Skagit River Delta area, Washington, 2007 and 2008.

[Abbreviations: ft/ft, foot per foot; ft/mi, foot per mile; NAVD 88, North American Vertical Datum of 1988]

Measurement August 2007 November 2007 February 2008 May 2008 Annual
Fitted coefficients, from Microsoft Excel®
a0 (Intercept) -628.10 -589.49 -659.44 -768.90 -661.48
a1 (x variable 1) 0.000456 0.000462 0.000488 0.000597 0.000501
a2 (x variable 2) 0.000116 0.000030 0.000104 0.000051 0.000075
Calculated hydrogeologic parameters
Gradient (ft/ft) 0.00047 0.00046 0.00050 0.00060 0.00051
Gradient (ft/mi) 2.49 2.44 2.63 3.16 2.67
Direction W 14.3° S W 3.7° S W 12.1° S W 4.9° S W 8.5° S
Water level at centroid (feet above NAVD 88) 5.71 6.40 7.52 7.54 6.79
Goodness of fit, from Microsoft Excel®
R2 0.896 0.879 0.848 0.874

For additional information contact:
Director, Washington Water Science Center
U.S. Geological Survey, 934 Broadway — Suite 300
Tacoma, Washington 98402
http://wa.water.usgs.gov

Part or all of this report is presented in Portable Document Format (PDF); the latest version of Adobe Reader or similar software is required to view it. Download the latest version of Adobe Reader, free of charge.

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: http:// pubsdata.usgs.gov /pubs/sir/2009/5208/table2.html
Page Contact Information: Contact USGS
Page Last Modified: Thursday, 10-Jan-2013 19:38:36 EST