Laserfiche WebLink
were drilled with a Giddings Rig or a hand auger, and were from 7 to 12 feet deep, except the <br />four Swale and Upland wells which were installed by the National Audubon Society by <br />pounding an open- ended, non - perforated 20 ft pipe approximately 16 ft into the ground. <br />The river stage gaging station was located near the southwestern corner of the study site <br />on the South Channel of the Platte River. An additional river stage gaging station was installed <br />on the channel in the northwest corner of the site in June 1990 to monitor potential differences <br />between the two channels. Two additional staff gages were also located near the other two <br />corners of the study site to help define the surface water slope surrounding the site. <br />Data Analysis <br />Data were entered into a micro computer using standard data management programs to <br />simplify data transfer between agencies. Data were also transferred to the University of <br />Wyoming's VAX mainframe computer for manipulation, plotting, and statistical analysis. <br />Continuous groundwater and river -stage data were entered as mean daily values. Data for all <br />other wells and staff gages were entered as point data. Precipitation and pan evaporation were <br />entered as daily totals. Relative humidity, solar radiation, and barometric pressure were <br />entered as mean daily values. Soil and air temperatures were entered as daily maximum, <br />minimum, and mean values. Wind travel data were entered as average daily values computed <br />from the monthly total wind travel. Groundwater withdrawals for irrigation were entered as <br />daily on /off data for each well during the irrigation season. Due to the substantial quantity of <br />continuous data obtained, the raw data will not be included in this report. The data, however, <br />can be obtained by request from the Principal Investigators through the U.S. Bureau of <br />Reclamation at Mills, Wyoming. <br />Groundwater and River Stage Iivdrographs <br />Box -and- whisker plots (Ott 1988, SAS Institute Inc. 1990a) were used to summarize the <br />groundwater and river stage hydrographs. Observations were summarized by month to allow <br />examination of the water level variation within months as well as between months. <br />17 <br />