Cretaceous Aquifer - Augusta/Richmond County

Aquifer characteristics: Water levels in six wells in the Cretaceous aquifer system were used to define groundwater conditions in the Augusta/Richmond County area, in eastern Georgia. In this area water in the Cretaceous aquifer system mostly is confined (under pressure by overlying sediments) but can be unconfined (in contact with the atmosphere) in stream valleys or the outcrop area in central and northern parts of the county near the fall line which is the southern boundary of the Piedmont. Hydrographs mostly show periodic upward or downward trends in the central and southern part of the county that largely reflect changes in pumping and long-term, multi-year wet and dry periods. Hydrographs in the northern part of the county strongly respond to rainfall with a secondary response to pumping. The brief responses to rainfall events may not be apparent in the monthly mean data.

Well Locations with Ten Year Trend Icons

up arrow icon down arrow icon    Arrow icons represent upward or downward water-level trend. Water-level trend calculations based on last 10 years of data.
dot icon    Circle icon represents slope of trend line with an absolute value that is less than 0.01 feet per year (ft/yr), based on last 10 years of data.
up arrow icon with graph down arrow icon with graph dot icon with graph    Split color icons represent wells with graphs.
square light blue precip gage icon    Light blue square indicates nearby precipitation gage.
diamond icon    Diamond icon represents less than 100 monthly-mean water levels from the last 10 years of data.
(Click or hover over map icons for more information.)

Water-level Trends: The table below shows the period of record (POR) and most recent ten-year trends of monthly mean water levels for the six Cretaceous-aquifer wells monitored in the Augusta/Richmond County area. The data used in the trend analyses are pulled from the USGS National Water Information System: Web Interface (NWISweb), and the trends are calculated in ft/yr. The check boxes on the left side of the table allow the reader to compare only those wells of interest by selecting them on or off to appear on the Monthly Mean Composite Graph. The POR trend for three of the wells was negative and three was positive.

Below the table and composite graphs are trend analysis graphs for four selected wells. The trend analyses show mostly long-term effects of pumping. A simple regression line may be placed on the graph by selecting the Simple Regression button, and the slope of the line is calculated. To clear the regression line, select the Clear Regression Line button. Like the composite graph, the user can click and drag the mouse vertically or horizontally to change the scale and zoom in to the time-period of interest. Any changes to the time scale will require the user to clear and recreate a regression line for the new time scale. Double click on the graph and it will return to the period of record.

Period of Record (POR) and Previous Calendar Year Summary Table
Well Period of Record Previous Calendar Year
Mean of monthly water levels in feet below land surfaceMonthly mean water levels in feet below land surface
29AA09xxxxxxxx
30AA04xxxxxxxx
30AA37xxxxxxxx
30AA38xxxxxxxx

Period of Record (POR) and Previous Calendar Year Table, updated weekly. Monthly Mean Composite graph updated weekly, all other graphs and tables continuously updated. Negative depths to water indicate water level in feet above land surface.

Slope of trend line for Period of Record (POR) and previous Ten Years
Station Name
Data Link
County
Water-bearing
Unit1
POR First
Month/Year
POR slope
(ft/yr)
Ten Year
slope (ft/yr)
Richmond Upper Midville xx xx yy
Richmond Midville xx xx yy
Richmond Lower Midville xx xx yy
Richmond Dublin-Midville xx xx yy
Richmond Midville xx xx yy
Richmond Lower Dublin xx xx yy

Slope of 0.00 represents no trend.

Monthly Mean Composite Graph

To change the graph scale, click and drag mouse vertically or horizontally.
To reset the graph scale, double click on the graph.
Blank where data are missing.

Date
Depth below land surface (feet)
250
200
150
100
50
1980
1990
2000
2010
2020
Monthly Mean Graph Values
(mouse over graph for date and depth)

Select Monthly Mean Data Graphs with Trend Analysis

To change the graph scale, click and drag mouse vertically or horizontally. To reset graph scale, double click on the graph. Blank where data are missing.


Station name: 29AA09
Content: Richmond
Number: 332131082013401

Date
Depth below land surface (feet)
72
70
68
66
64
2000
2010
2020
Slope (ft/yr):
Date (begin): Date (end): Data points:

Station name: 30AA04
County: Richmond
Number: 331711081573701

Date
Depth below land surface (feet)
135
130
125
120
1980
1990
2000
2010
2020
Slope (ft/yr):
Date (begin): Date (end): Data points:

Station name: 30AA37
County: Richmond
Number: 332221081584601

Date
Depth below land surface (feet)
50
48
46
44
42
40
38
Jan 2010
Jan 2011
Jan 2012
Jan 2013
Jan 2014
Jan 2015
Jan 2016
Jan 2017
Jan 2018
Jan 2019
Jan 2020
Jan 2021
Jan 2022
Jan 2023
Jan 2024
Slope (ft/yr):
Date (begin): Date (end): Data points:

Station name: 30AA38
County: Richmond
Number: 332221081584602

Date
Depth below land surface (feet)
42
40
38
36
34
32
Jan 2010
Jan 2011
Jan 2012
Jan 2013
Jan 2014
Jan 2015
Jan 2016
Jan 2017
Jan 2018
Jan 2019
Jan 2020
Jan 2021
Jan 2022
Jan 2023
Jan 2024
Slope (ft/yr):
Date (begin): Date (end): Data points:

References