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<br />Ci (1 1 9 4, h
<br />
<br />estimated, were measured between March 9 and March 19, 1999; the results of those measurements are
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<br />listed in table 1. During the measurement period (March 9 to March 19, 1999), flow in the Fort Lyon
<br />
<br />Canal was steady but relatively low, about 100 to 200 cubic feet per second, and flow in the Arkansas
<br />
<br />River varied from about 50 to 150 cubic feet per second.
<br />
<br />The depth to water measurements were converted to elevations of the water-table surface, and the
<br />
<br />resultant elevations were contoured by hand to produce a generalized water-table map, shown in figure
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<br />2. Estimates ofIand-surface elevations were made using 1:24,OOO-scale topograp~,~a~s, an~~ap
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<br />accuracy and estimation techniques dictated the estimates may depart from aCl'4al,elevation~by'as..,)
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<br />much as 2.5 feet. / '\. '\ //~~' <>~., J
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<br />In places where water-table surfaces are near the land suiface;::t!1ete'1s' 9fi,eft.f9lfrpst in knowing
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<br />how close the water-table surface is to the land surface. To sh~~:thil";nio~\i6~:~-r;;~p of depth to
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<br />water below the land surface was prepared by subtrl!<;ling\ctlgitaI re~tis~ri\a~i;;ns of the generalized
<br />--'<:>-- \_,~ - - '-'-,/> ,//::~-~~~~>~ '</'
<br />water-table map (fig. 2) and the land surface.1:he'r~~I!Hing depl,h'(9"Y)t1'ir map is shown in figure 3.
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<br />The generalized water~tilt>I'et~l!P'(~'::~?,~hows the direction of gronnd-water movement, which is
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<br />perpendicular to the \Va(e{~ta1:>le;C~J!t~l1!s. ~F ~ap indicates that, during the measurement period, the
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<br />prevailing directiol\(jf grolmd.~,,(ef'inovement in the study area was from west to east. The gradient of
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<br />
<br />
<br />Water Table
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<br />the waterta?l~;;in~iGat~dby'th~'~~,d~ing of the contours, in the west to east direction was comparable to
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<br />that of the rh'e,rl al3o,ut'.6"f~~t per mile.
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<br />
<br />The map:alsbillditates that, in much of the study area, during the measurement period, ground
<br />
<br />water was moving 'from the area of the Fort Lyon Canal and the Arkansas River toward the center of the
<br />
<br />study area; a condition indicating that the aquifer was receiving recharge from both the canal and the
<br />
<br />river. The gradient from the area of the Fort Lyon Canal to the center of the study area is sometimes
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<br />
<br />3
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