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<br />Table 1. - PhY8ica~ characteM..8tic8 of a PYl'Oc"Lastic 80i~~ <br /> Onion Creek E:cpezti.menta~ Fore8t~ Ca~if. <br /> Soil depth Sand Sil t Clay Bulk density Porosity <br />- in percent <br />0- 81 0 - 3.2 54.6 27.4 18.0 1.28 51.7 <br />81- 150 3.2- 5.9 54.6 27.4 18.0 1.12 57.7 <br />310- 460 12.2- 18.1 49.6 30.4 20.0 1.11 58.1 <br />460- 610 18.1- 24.0 51.6 27.4 21.0 1.16 56.2 <br />840- 990 33.1- 39.0 47.6 30.4 22.0 1.14 57.0 <br />1140-1300 44.9- 51.2 48.1 29.4 22.0 1.30 50.9 <br />1450-1600 57.1- 63.0 45.6 29.4 25.0 1.39 47.5 <br />1750-1910 68.9- 75.2 43.6 34.4 22.0 1.39 47.5 <br />1800-2210 70.9- 87.0 49.0 30.0 21.0 1.11 58.0 <br />2360-2510 92~9- 98.8 54.6 28.4 17.0 1.27 51.7 <br />2670-2820 105.1-111.0 57.0 27.0 16.0 1.02 61.5 <br />2970- 3120 117.0-122.8 46.6 33.4 20.0 1.12 57.7 <br />3120-4060 122.8-159.8 46.7 33.3 20.0 1.11 58.1 <br /> <br />water at other levels. Tracers were injected at several levels in <br /> <br />the soil at a time when 51 _ (2 in) snowmelt water per day were <br />being added to the soil and the water table stood at 610 mm (24 in) <br />depth from the soil surface. Movement rates of 5.2 to 7.3 m (17 to <br />24 ft) per 24 hours were recorded. <br /> <br />These and other studies indicate that higher flow velocities are <br /> <br />associated with higher wate~ tables. This seems reasonable since <br /> <br />higher water tables will have a greater hydraulic head at any point <br />downslope because of the water held in the soils on the slopes above. <br /> <br />During and shortly after snowmelt, water mvement in these soils <br /> <br />14 <br />