DWR_2807910 - Laserfiche WebLink

MEMORANDUM December 13, 2013 Issues with Selecting an Appropriate Crop Growth Stage Coefficient for the SCS Mod. Blaney Page 17 of 34 Location San Joaquin Phoenix (unknown) Phoenix Los Angeles Coastal Intermediate Interior Davis South Area Table 14 – Locations of orchard data from ARS 1275 The average of the data from ARS 1275 did not show a strong shown in Chart 13. However, for orchards with cover, it does appear that the SCS made a “hand drawn” line that approximately incorporates the average of and February the SCS line follows the data from “Oranges, Interior Area,” then along the maximum of the data sets, which includes “Walnuts, Sourthern Area” in March, and gently down to the approximate average of the data set in D Figure 17). This approximation showed a strong correlation (R shown in Chart 14. The average elevation from the entire data set reflects feet above sea level. However, the elevation of “Lemons” in California were estimated using data from Los Angeles, and oranges in the “coastal areas” of California were estimated using data from Stockton, oranges in “intermediate areas” of California were estimated using da areas” and the “Southern Area” of California, for oranges and walnuts respectively, were estimated using data from Murrietta. Figure 17 - kc vs. month for 0.0 0.2 0.4 0.6 0.8 1.0 1.2 0 2 Issues with Selecting an Appropriate Crop Growth Stage Coefficient for the SCS Mod. Blaney-Criddle Eqn. Elevation State Crop (m) (ft) San Joaquin CA Deciduous Fruit 53 174 AZ Grapefruit 340 1,117 (unknown) CA Lemons 71 233 AZ Oranges 340 1,117 Los Angeles CA Oranges 71 233 CA Oranges 4 13 Intermediate CA Oranges 53 174 CA Oranges 334 1,096 CA Walnuts 16 52 South Area CA Walnuts 334 1,096 Locations of orchard data from ARS 1275 data from ARS 1275 did not show a strong relationship (R2 = 0.514) . However, for orchards with cover, it does appear that the SCS that approximately incorporates the average of the data set. D the SCS line follows the data from “Oranges, Interior Area,” then along the maximum of the data sets, which includes “Walnuts, Sourthern Area” in March, and “deciduous fruit” in June, then sloping gently down to the approximate average of the data set in December (as shown below by the dots This approximation showed a strong correlation (R2=0.998) to the SCS TR The average elevation from the entire data set reflects approximately around However, the elevation of “Lemons” in California were estimated using data from Los Angeles, and oranges in the “coastal areas” of California were estimated using data from Stockton, oranges in “intermediate areas” of California were estimated using data from San Joaquin, the “interior areas” and the “Southern Area” of California, for oranges and walnuts respectively, were estimated using vs. month for Orchards with cover 4 6 8 10 Deciduous Fruit Grapefruit,AZ Lemons Oranges, AZ Oranges, CA Oranges, coastal area Oranges, Intermediate Area Oranges, Interior Area Walnuts, Davis Walnuts, Southern Area Average of ARS 1275 SCS TR-21 Orchard with Cover Criddle Eqn. to SCS TR-21, as . However, for orchards with cover, it does appear that the SCS may have simply the data set. During January the SCS line follows the data from “Oranges, Interior Area,” then along the maximum of the in June, then sloping (as shown below by the dots in =0.998) to the SCS TR-21 curve, as approximately around 531 However, the elevation of “Lemons” in California were estimated using data from Los Angeles, and oranges in the “coastal areas” of California were estimated using data from Stockton, ta from San Joaquin, the “interior areas” and the “Southern Area” of California, for oranges and walnuts respectively, were estimated using 12 Walnuts, Southern Area 21 Orchard with Cover