2010-12-13_HYDROLOGY - M1980047 - Laserfiche WebLink

Home Browse Search

Richard D. Piland & Associates Hydrology Monitoring Report 2007 • Stream flow Monitoring Data The 2007 Water Year Discharge reports and hydrographs of the five stream flow monitoring station are in Appendix A. There are three graphs for each station; one representing daily flow in cubic feet per second, one representing monthly acre feet totals and one of annual total discharge in acre feet. The total precipitation for the 2007 Water Year was below average for the period of record at the Colony Site. The winter snow pack was considerably below average, with most of the snow melting during the middle of March. Spring moisture was also below average. October 2006 and September 2007 were the only above average months. Total precipitation for the water year was 16.7 inches of moisture, with the average being 20.7. The 2007 Water Year total stream flow discharge was below average, probably due to past extended drought conditions. The snow melt runoff and summer rain storms did not produce much surface flow in the upper streams. The stream discharge was less than half of the average discharge. Table 4 (with the graph titled Total Yearly Discharges) plots yearly stream flow runoff discharge in acre feet for each year from 1997 through 2007. Total yearly precipitation for each year is shown at the bottom of the table and as a dashed line on the graph plotted against the second y-axis. Table 5 lists the average monthly stream flow at each monitoring site for the • period 1984 to 2007. The accompanying graph titled Average Monthly Discharge clearly shows peak discharges are usually during May. In 2007 stream discharge peaked during mid-April from snow melt runoff. Stream flow water quality samples collected for each site are listed in Table 2. During the 2007 Water Year samples were collected at F1 3R Davis Gulch (549N) each quarter and F1 R during the second, third and fourth quarters. Graphs were made of the water quality parameters which are marked in Table 3. These water quality graphs are in Appendix B. Parameters not graphed were considered to be too consistent or low in analysis. Sampling sites were changed in 1993 to two sites, F13R Davis Gulch and Middle Fork @ Lab ( F1 R when MF@ Lab is dry). During 1997 the surface water quality parameters and chain of custody procedures were changed. Sampling parameters are outline in batteries for each type of sample collected (ie.-Site Stream, Site Well, or Site NPDES). Site Stream Battery A is listed in Appendix B. A separate chain of custody form is now filled out for each Battery Type. Each Battery is then logged by the Lab as a separate job which stream lines billing and reporting. GROUNDWATER MONITORING WELLS Groundwater monitoring wells are summarized in Table 6 showing well location, completion interval, elevation, total depths and other data. 0 5