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Show CONSUMPTIVE USE OF WATEB IN IEBIGATION 1375 to study the merits of Hedke's proposal, the determinations of valley consumptive use made by Crandall, Harding, and Meeker are assembled in Table 8. Each river system is designated by a number given in Column (1). The minimum growing temperatures given in Column (5) were selected on the basis of the minimum growing temperatures for the predominating crops in the respective areas. Column (6) contains the names of the TJ. S. Weather Bureau stations from which temperature records were taken as the basis for computing the available heat as given in Column (8). The data presented in Columns (7) and (8) are platted in Fig. 2, which suggests a straight line relation between Uv and Qk. The slope of the line in Fig. 2, or the magnitude of K in the equation, Uv = KQu, is 0.00039, which is about 8% less than the magnitude of K as determined from Hedke's analysis of Cache la Poudre experiments. This is considered a close agreement, particularly when it is recognized that the minimum growing temperatures of so many crops under such varied conditions can only be approximated. The Snake Eiver results seem to be the most erratic. It is hoped that this report will elicit additional data on valley consumptive use, particularly from areas of high mean annual temperatures, so that the straight line relation indicated by Fig. 2 may be affirmed or modified. TABLE 8.-Magnitudes of Valley Consumptive Use, Um and Available Heat, Q^ for Typical Irrigated Valleys in the "Wes No. (i) River system. (a) (3) State (4) mi (5) Cities furnishing temperature records. o u ¦3 (7) (8) Little Laramie...... Little Laramie...... Boise Project, Mason Creek.............. Cache la Poudre___ South Platte......... 12 Wyoming . Wyoming . .. Idaho...... 2 ! Colorado.. 10 Colorado.. Boise Project..... Sevier River.........! South Platte.........I Snake River Twin Falls Project...... Kings................ Kaweah............. Truekee and Reno .. Idaho. Utah. 2 Idaho...... 4 I California. 4 California. .. JNevada___ 36 Laramie................... Laramie................... Boise. Caldwell. Meridian. Fort Collins. Greeley...... Jalesburg, Sterling, Fort Morgan.................. Boise. Caldwell, Meridian. Richfield. Siarysvaie...... (See No. 5)................ Twin Falls, Shoshone..... Fresno, Hanford.......... Visalia, Tulare, Lindsay.. Reno...................... 1.2 l.S 1.4 1.8 1.8 1.6 1.5 1.9 2.6 2-.0 2.2 8.0 3 455 3 466 4 857 4 150 4 523 i 367 3 828 4 523 4 035 7 908 7 751 5 150 Summary and Conclusion 1.-The term, "consumptive use of water", has been given an important place in engineering literature. 2.-Definitions of consumptive use are proposed in this report both in its basic sense and with respect to the area concerned, whether a farm, a project, or a valley. |
