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<br />Table 2
<br />Hat Creek Ditch Water Budget
<br />(values in acre-feet)
<br />
<br />Rowl Component I Nov Dee I Jan I Feb Mar I Apr May I Jun Jul I Aug I Sep I Oct I Total
<br /> Ditch Diversion
<br />1 Hat Creek Ditch diversion 0,0 0,0 0,0 0,0 0,0 0,2 4,9 55,1 69,7 55,0 34,6 10,8 230,3
<br />2 Ditch Loss 0,0 0,0 0,0 0,0 0,0 0,0 0,5 5,5 7,0 5,5 3,5 1,1 23,1
<br />3 Field Delivery 0.0 0,0 0.0 0,0 0.0 0,2 4.4 49,6 62.7 49,5 31.1 9.7 207.2
<br /> Soil Root Zone Operation
<br />4 Consumptive Irr Reqt 0,0 0,0 0,0 0,0 0,0 0,0 5,3 9,5 8,1 5,9 5,5 1,1 35.4
<br />5 Deep Percolation 0.0 0,0 0.0 0,0 0.0 0,1 1.1 18,5 27.3 21,8 12.8 4.3 85.9
<br />6 Tailwater 0.0 0,0 0.0 0,0 0.0 0,1 1.1 18,5 27.3 21,8 12.8 4.3 85.9
<br />7 Consumptive Use 0,0 0,0 0,0 0,0 0,0 0,0 5,3 9,5 8,1 5,9 5,5 1,1 35.4
<br />8 EOM Storage 7,9 7,9 7,9 7,9 7,9 7,9 4,8 7,9 7,9 7,9 7,9 7,9 ----
<br />9 Storage Change 0.0 0,0 0.0 0,0 0.0 0,0 -3.1 3,1 0.0 0.0 0.0 0.0 0.0
<br /> Return Flow
<br />10 Surface Water 0,0 0,0 0,0 0,0 0,0 0,1 1,1 18,5 27,3 21,8 12,8 4,3 85,9
<br />11 Ground Water 1.4 0,0 0.0 0,0 0.0 0,1 1.2 18.4 31.7 29,1 19.1 8.1 109.1
<br />12 Total 1.4 0,0 0.0 0,0 0.0 0,2 2.3 36,9 59.0 50,9 31.9 12.4 195.0
<br /> Stream Depletion with respect to the River Headgate
<br />14 Net (acre-feet) -1.4 0,0 0.0 0,0 0.0 0,0 2.6 18,2 10.7 4,1 2.7 -1.6 35.3
<br />15 INet (cfs) 1 -0,02 0,00 0,00 0,00 0,001 0,00 0,041 0,31 0,17 0,07 0,05 -0,03 ---
<br />
<br />Row Description
<br />1, Average monthly diversion by the Hat Creek Ditch for 1951-1992 for years diversions were recorded. See Table 1.
<br />2, Ditch seepage loss at 10 percent based on "Estimating Seepage Losses from Canal Systems" by R,V, Worstel, Journal of
<br />Irrigation and Drainage, ASCE, March 1976.
<br />3, Row 1 - Row 2 = Field delivery
<br />4, Consumptive irrigation requirement for 22 acres of hay and pasture grass using modified Blaney-Criddle method and crop
<br />coefficients presented in "Evapotranspiration in High Altitude Mountain Meadows in Grand County" by N, Carlson (Denver
<br />Water Department),
<br />5, Percolation through root zone to ground water. Delivery exceeding consumptive irrigation requirement plus soil moisture
<br />deficit is divided equally between deep percolation and tail water. Minimum amount is 25% of field delivery,
<br />6, Runoff from end of field, Delivery exceeding consumptive irrigation requirement plus soil moisture deficit is divided equally
<br />between deep percolation and tail water, Minimum amount is 25% of field delivery, Maximum irrigation efficiency = 50%,
<br />7, Crop consumption use equals consumptive irrigation requirement if water supply and carry over soil moisture are adequate,
<br />8, Previous month's storage + Row 3 - Row 5 - Row 6 - Row 7, limited to available water holding capacity of 7.9 acre-feet.
<br />9, Change in soil moisture storage from previous month,
<br />10, From Row 7
<br />11, Return from ditch seepage and deep percolation. Centroid of field is approximately 300 feet to river, Underlying materials
<br />are gravel, cobbles with moderate permeabliity ("Soil Survey of Aspen-Gypsum Area, Colorado" USDA, May 1992), 75%
<br />returns to river in same month as diversion and 25% returns in the following month..
<br />12, Row10+Row11
<br />13, Diversion - Return Flow (Row 1 - Row 12). Negative depletion indicates a historical stream accretion caused by the lagged
<br />groundwater return flow,
<br />14, Row 13 converted to cubic feet per second
<br />
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