DWR_3211847

• Title: GROUND WATER LEVELS IN THE LOWER SOUTH PLATTE RIVER BASIN ALLUVIAL AQUIFER
• Year: 1991
• Document Type - Publications and Reports: Ground Water Levels Report

0
•
0
WATER LEVELS IN THE ALLUVIAL AQUIFERS
OF THE LOWER
SOUTH PLATTE RIVER BASIN, COLORADO
1991
By John C. Romero
The purpose of this report is to provide measurements of depth to water in 69 wells within the
. Lower South Platte River Basin for the spring of 1991. The data presented in this report is a result
of cooperation between local well owners and the Central Colorado Water Conservancy District.
Funding for this project is supplied in part from well permit fees collected and managed by the
Office of the State Engineer as a result of the passage of Senate Bill 200 during the 1987 legislative
session.
The table in this report includes data on up to seven water level measurements, including the
measurement at the time of well construction and water level change data for three time periods.
The measurements are expressed in feet below land surface and were made with either an electric
sounder or a steel tape by irrigation Division 1 water commissioners (DWR) and the Central
Colorado Water Conservancy District (CCWCD). All of the monitoring wells are completed in
unconsolidated gravel, sand, silt, and clay of predominantly alluvial origin.
i
A cursory evaluation of the data reveals that since their construction, approximately 67 percent of
the wells have experienced a water level decline, and 33 percent have experienced a water level
rise. The declines, however, have been generally quite low, ranging from 0.005 feet per year to 1.1
feet per year. Declines less than 0.01 feet, for example, can be insignificant since such changes can
be caused by wind, earth movement, and the effect of evapotranspiration and phreatic consumption,
and may even be a result of erroneous data recording. Water level rises are in the same general
scale as the declines, 0.08 feet/per year to 0.3 feet per year.
•
JCR/clf:alluvial
•
•
0