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<br />. <br /> <br />. <br /> <br />C) <br />~ <br />~ <br />u~ <br /> <br />very few, well defined threads of channel. vegetation similar <br /> <br />to the surrounding area comes down to and across the channel <br /> <br />bottom. A study of these channel areas downstream from the stock <br /> <br />ponds indicates that water of sufficient magnitude to cut well <br /> <br />defined channels has not historically flowed down these channels. <br /> <br />It is obvious. therefore, that infiltration into the soils of the <br /> <br />channel would be quite high and that the net yield at the lower <br /> <br />reaches would probably not be significant. A detailed study of <br /> <br />the infiltration over the extensive area involved is not feasible <br /> <br />at this time. It is the concensus of the staff of the Colorado <br /> <br />Water conservation Board that the effect of these stock ponds at <br /> <br />the Trinidad gage would be considerably less than the l.69 percent <br /> <br />average indicated in the procedure outlined above and it is ques- <br /> <br />tionable that the effect would be measurable at the gage. <br /> <br />A study similar to the purgatoire River at Trinidad was <br /> <br />made for the Apishapa River near Aguilar. The period studied was <br /> <br />from 1940 to 1950. The precipitation stations used were those <br /> <br />at walsenburg and Trinidad and the river gage was the gage on the <br /> <br />Apishapa River near Aguilar. It was found that of the ten years' <br /> <br />studies, from an examination of river flows, that in only four of <br /> <br />the years was the precipitation apparently watershed-wide. Assum- <br /> <br />ing again that all of the stock ponds, aggregating 237 acre-feet <br /> <br />of capacity, were filled in this storm, the average effect on the <br /> <br />-5- <br />