WSP12092 - Laserfiche WebLink

Home Browse Search

season diversions ill both states W::lS tk greiltest since 1949-30 and was more than 50 per cent grC'<ltcr than the ;cventeen'year average. Reservoir releases during the irrigation season were 280,430 acre' feet. Demands for irrigation water during the season were 280,503 acre,feet. Total diversions v..'C'rc 66.327 ,lcre.feet grcater than the irriga. tion releases for the sr(lson. Runoff from the area below the reservoir and return flows provided 19 per cent of the water diverted during the irrigation season. Releases from the reservoir avernged 250 c.f.s. from November 1, 1965, to March 31, 1966, and 661 d.s. irom April 1, 1966, to Gctcher 31, 1966. Statelinc flows for corrLspnnding periods averaged 333 c.f.s. and 418 c.f.s. respectively. The total discharge for the year <It Garden City was 146,140 acre- feet of which I I 4,1 SO acre' feet or 78 per cent occurred as winter flows. 8. Gaging Stations Streamflow records of satisfactory accuracy were obtained at the Compact stations. Emphasis was continued on performing additional field work and providing streamflO\'\' data to the Administration and to State officials as required. It will be noted that the computed daily demands by Colorado and Kansas in Appendices B'lO and R,ll do not tllwtlys agrec with the actual measured releascs at the gaging station, as shown in Appendix B,6. Part of this discrepancy is the result of the lag in time involved in adjusting the outlrt gat€".s in the darn and when the outflow is measured at the gage. The rest of the discrep<lncy is due primarily to the rating table changes, caused by a shifting channel, being unavailable at the time of changes in releases. Relocating the gage nearer to the dam and installation of an artificial control section \vould minimize the variations in the records. The gaging station on the Purgatoire River near Lils Anima:- was operated at temporary sites during the year. Tt was not practicahle to install the radio equipment ::I.t the temporary locations. However, the station was moved back to the former site at the new Highway 101 bridge and the radio equipment put ll1 operation during November 1966. The station on the Arkansas River near Coolidge was moved down- stream about 1500 feet to the h!ghwJ}' hridge. This change was neces' sary because of the extensive ffcsion at the old site during the June 1965 flood. Conditions at the st,lticn on the Arkamas River at Las Animas worsened during the ycu ;tnd it wa-: neces.sary to construct a low dike across the by'pass channel to ccntinue operations at the present site:. The station will be moved upstream to the: new Highway 50 hridgc when the !ow,wfl.ter channel at that point hfl.s stabilized. 10