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<br />'::1" <br />00 <br /> <br />~ <br /> <br />(" <br />_.J <br />C' <br /> <br />The relationship between jnflow at Del Norte and the Rio <br /> <br /> <br />Grande component of outflow at Lobatos seems to indicate that the <br /> <br />relationship set up under the Compact does not conform too closely <br />with the historic relationships since 1928. It would appear that <br />when the flow of the river at Del Norte is below 600,000 acre-feet, <br />a negative departure can usually be expected, and when it is above <br />that amount a positive departure probably would occur more years <br />'than ~ould a negative departure. This may not be conclusive. <br />Referring to Plate 3 in the .Appendix it may be noted that the. <br />runoff during the years 1950, 1951, 1953, and 1954 were among <br />the lowest of record. There intervenes in the 5-year period, <br />1950 through 1954, only one year, 1952, when the runoff was <br />'" above average. It could well be that the relationship shown <br />between inflow and outflow for this relatively ~ong period of <br />low runoff would depart from the Compact relationship without <br />there being any changed conditions from those that were obtained <br />between 1928 and 1937 so far as withdrawals from the river are <br /> <br />f"', <br /> <br />- <br /> <br />concerned. <br /> <br />Plate 23 shows accumulated. diversions from the river by <br /> <br />yearly periods from 1928 through 1953, plotted against accumulated <br />stream flow at Del Norte. There is. shown on this plate cumulative <br />total diversions between Del Norte and Alamosa, cumulative di- <br />versions by the so-called Big Four, and accumulated diversions <br />of the balance of the canals. An inspection of the curves on this <br />plate does not disclose any marked changes in the relationship be- <br />tween diversions and water supply. The largest aggregate diversions <br /> <br />- 16- <br />