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1950 GF = 1956 total GF - 1956 GF parcels assigned to wells permitted from <br />1951 through 1956 <br />Total acreage is the sum of the two acreage subsets. <br />Approach -Well Capacity Filling <br />Two approaches were investigated for filling well capacity between snapshots. The first <br />approach, Well Capacity Filling A, was based on well permit or appropriation date and all wells <br />that were historically used by a structure. The second approach, Well Capacity Filling B, was <br />based on well capacity at each snapshot and filled linearly between known points. <br />Well Capacity Filling A -Approach <br />1. A list was generated of all wells used historically from snapshots and limited to <br />unique wells. <br />2. The capacity for any given year was determined by adding the capacities of all wells <br />permitted or appropriated at that time. <br />Well Capacity Filling B -Approach <br />1. A list of wells in use was generated for each snapshot. <br />2. The capacity for any given snapshot was determined by adding the capacities of all <br />wells used for that snapshot. <br />3. For non-snapshot years capacity was linearly interpreted between snapshots. <br />4. The capacity for 1956 was used for years 1950 through 1955. <br />5. The capacity for 2005 was used for years after 2005. <br />Results showed that total well capacity estimated by Well Capacity Filling B was lower than <br />Well Capacity Filling A for some years between acreage snapshots. These results prompted a <br />sensitivity investigation using StateCU to analyze the affects of the lower total well capacity <br />generated by Well Capacity Filling B. Two StateCU runs were created to analyze the affects of <br />the differences in total well capacity between Well Capacity Filling A and B. Acreage Filling B <br />was used to generate irrigated acreage and its distribution between the four acreage subsets and <br />did not very between analyses -only total well capacity varied. <br />Results <br />Figure 1 through 4 present the acreage distribution by acreage subset over time for the Acreage <br />Filling A and the Acreage Filling B. Figures 5 through 8 present the total well capacity per <br />structure estimates, using both filling procedures. <br />