Laserfiche WebLink
<br />. <br /> <br />. <br /> <br />June 2, 1997 <br />Page 3 <br /> <br />In Reach 2, the USGS was able to track peaks and daily flows in the existing flow records and <br />concluded that the median annual gain/loss approaches zero, Summer and fall periods on average <br />have small (1-3 cfs) losses, Traveltimes through the 40 mile reach range from 12 to 48 hours, with <br />one day being a reasonable average. <br /> <br />In Reach 3, traveltimes were slightly longer, but also close to one day on average, There were small <br />gains at all times of year, from a low of 2 cfs in the winter, but approaching 15 cfs during the <br />summer, These gains were most likely due to unmeasured return flows from the 4,500 irrigated <br />acres in the reach, <br /> <br />These findings were somewhat surprising in that they refute the conventional wisdom that the lower <br />Purgatoire was some type of "black hole" into which water disappeared never to be seen again, <br />These findings are inconsistent with the "negative" transit loss theory that PRWCD was hoping to <br />advance, Never-the-less, water users and officials now have a better basis for administering future <br />exchanges and futile call determinations. Whether a Phase 2 study is warranted is doubtful, but still <br />open to discussion and being considered by the PRWCD. <br /> <br />cc: CWCB Board Members <br />Sandy MacDougall <br />David Harrison <br /> <br />C\SRMILLER\ARKANSAS\PRQJECTS\TRANSlnPURGTL03.MEM <br />June2, ]997 <br />