Laserfiche WebLink
<br />~ <br />~;J <br /> <br />study the relation between weighted average altitude of drainage <br /> <br />area ~nd runoff per square mile was quite fully developed, and <br /> <br />/' <br /> <br />may be used as a basis for deriving the runoff at the site of the <br /> <br />~ <br /> <br />proposed reservoirs from the record at the gaging station. <br /> <br />The last period of record, April 1, 1927, to September 30, <br /> <br />1936, has been ()hosen as the controlling period of study bec'luse it <br /> <br />is the longest consecutive record on the river. It has the advantage <br /> <br />also that there were no consecutive years of high flow and that same <br /> <br />of the lowest nows ever known on Florida River occurred during the <br /> <br />period. The results with supplemental storage during such a period <br /> <br />should be a very conservative picture of what will occur with a given <br /> <br />storage capacity,. <br /> <br />Runoff at the station muy be considered as the supply avail- <br /> <br />...~ <br />t"r'~~~~ <br />'.~ik:.;~' <br /> <br />able for project use, The diversions above the station, both for <br /> <br />irrigation of non-project lands and for the city of Durango have <br /> <br />automatically been subtracted fram the present record. Diversions <br /> <br />outside the project below the station are from tributaries so low on <br /> <br />the stream that no water can be diverted to the project from these <br /> <br />streams except, perhaps, in small degree for the lower end of the <br /> <br />project land in the river valley. l~ile the city stores same water <br /> <br />its total of stor~ge and diversion is less than 310 of the average <br /> <br />annual flow of the river at the gage, and future increases in such <br /> <br />diversion will not encroach materially on project supplies. <br /> <br />The runoff for the periods of 1917 to 1924 and 1927 to 1936 <br /> <br />is shown in Table 6. <br /> <br />39 <br />