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Likewise, a generally upward-trending graph for a period of years represents a period of greater-than-average precipitation,which commonly causes and corresponds with rising water A positive departure, or greater-than-average precipitation, for a year results in a graph segment trending upward a negative departure results in a graph segment trending downward.Ī generally downward-trending graph for a period of years represents a period of generally less-than-average precipitation, which commonly causes and corresponds with declining water levels A cumulative plot is generated by adding the departure from average precipitation for the current year to the sum of departure values for all previous years in the period Number is assigned based on the Cadastral system of land subdivision.ģ8 42' 15" 14" 38 42' 13" 112 19' 39" 38" 112 19' 37" A B C Coordinates for well A (384213112193701) Coordinates for wells B (384213112193801) and C (384213112193802) Wells by the Cadastral System of Land SubdivisionĬumulative departure from average annual precipitation - A graph of the departure or difference between the average annual precipitation and the value of precipitation for each year,

In addition to the well number that is based on latitude and longitude for each well, another well When error corrections or new technology locateĪ site more accurately, latitude-longitude coordinates will change but the site number will not. In the event that the latitude-longitude coordinates for more than one well are the same, a sequential number such as “01,” “02,”Īnd so forth, would be assigned.Even though the site number is based on latitude and longitude, it may not reflect the accurate location of the site. Two digits are a sequential number for wells within a 1-second grid. The first six digits denote the degrees, minutes, and seconds of latitude, and the next seven digits denote degrees, minutes, and seconds of longitude the last

The system provides the geographic location of the well and a unique number for each site. Geological Survey well-numbering system is based on the grid system of latitude and longitude.