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<br />o <br />o <br />w <br />~ <br /> <br />During August and September, 1991, water quality samples were taken during six runoff events <br />on two small ephemeral washes that are tributaries to Sagers Wash. Runoff occurred following <br />short duration, high intensity, convective storms, typical of the area. Water samples were <br />collected using a DH-48 hand sampler and using automatic pumping water samplers, <br /> <br />Results of lab analysis show the average Total Dissolved Solids ('IDS) for all storm events to <br />be 1933 mglL. The minimum and maximum IDS for all storm events are 150 mglL and 4930 <br />mg/L respectively. Classification of water in terms of concentration of dissolved solids as <br />described by Robinove et ai, (1958) indicates that the average runoff for all storm events is <br />slightly saline. The maximum IDS level for all storm events indicates moderately saline runoff. <br />(See Table 5.0) <br /> <br />, <br /> <br />GROUND WATER <br /> <br />Formations in the Mesaverde Group and the Mancos Shale crop out in a band about 10 to 20 <br />miles wide southwest, south, and southeast of the Book Cliffs. None of these formations yields <br />substantial quantities of water to wells or springs in the Greater Sagers Wash Watershed, and <br />the Mesaverde Group and the Mancos Shale probably effectively inhibit downward movement <br />of water into the underlying sandstone aquifers in most places. Springs found on U.S. <br />Geological'SuIVey topographic maps are located where they would appear to discharge from the <br />Mesaverde Group or the Mancos Shale, but typically they discharge from overlying alluvium <br />(Blanchard, 1990). The Dakota Sandstone, the Cedar Mountain, and Morrison Formations crop <br />out in a band near the southeastern border of the Greater Sagers Wash Watershed. These <br />formations yield water to seeps, springs, and flowing wells. Discharge is typically less than I <br />gallon per minute (Blanchard, 1990). <br /> <br />Concentrations of dissolved solids in water samples from flowing wells located in the Sagers <br />Wash Subwatershed in Sec. 25, T, 22 S" R. 23 E., discharging from the Cedar Mountain <br />Formation, and in Sec, 29, T. 22 S., R. 23 E., discharging from the Brushy Basin Member of <br />the Morrison Formation ranged from 1,020 mglL to 1,470 mg/L. Sodium was the cation type <br />at both sites [Blanchard, 1990]. <br /> <br />, <br /> <br />27 <br />