Geological Survey Circular, Bände 20-24Geological Survey, 1949 |
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Häufige Begriffe und Wortgruppen
12.--Logs of auger auger test holes--Continued Bureau of Reclamation calcium carbonate Clay clayey County--Continued Creek dark brownish gray Date Date level Date level level Dawson County depth to water Drainage feet below land-surface Geological Survey grading downward grains Grand Island Ground altitude ground waters ground-water Hall County heavy minerals Hole in turbine Irrigation District July 11 June Lake land-surface datum--Continued level level level light brown light brownish gray light gray light pinkish limestone Loam Loup River lower Platte River medium brownish gray medium to coarse North Platte Norton County Ogallala formation outcrop Phillips County Platte River Valley Pleistocene pump quartzite samples sandy scattered pebbles Sept shale Silt silty Smoky Hill chalk Storage records Table 11.--Water-level measurements terrace deposits thickness Top of pipe tourmaline turbine base U. S. Geol Water Date Date water level water supply water table
Beliebte Passagen
Seite 44 - ... the number of gallons of water a day, at 60° F., that is conducted laterally through each mile of the water-bearing bed under investigation (measured at right angles to the direction of flow) , for each foot of thickness of the bed, and for each foot per mile of hydraulic gradient (Meinzer's coefficient: see Stearns, 1927, p.
Seite 54 - The conductance varies with the concentration and degree of ionization of the different minerals in solution and with the temperature of the water.
Seite 58 - Nitrate in water may indicate previous contamination by sewage or other organic matter as it represents the final stage of oxidation in the nitrogen cycle. The quantities of nitrate usually present in surface waters...
Seite 58 - The reported quantity of dissolved solids- -the residue on evaporation -consists mainly of the dissolved mineral constituents in the water. It may also contain some organic matter and water of crystallization. Waters with less than 500 parts per million oí COMPOSITION OF SURFACE WATERS 15 dissolved solids are usually satisfactory for domestic and some industrial uses.
Seite 44 - Methods for determining permeability of water-bearing materials: US Geol. Survey Water-Supply Paper 887, pp.
Seite 58 - ... as dissolved solids (the residue on evaporation) consists mainly of the dissolved mineral constituents in the water. It may also contain some organic matter and water of crystallization. Waters with less than 500 parts per million of dissolved solids are usually satisfactory for domestic and most industrial uses. Waters with more than 1,000 parts per million of dissolved solids are likely to be unsuitable for most domestic and industrial uses.
Seite 59 - Hardness between 50 and 150 parts per million does not seriously interfere with the use of water for most purposes, but it does slightly increase the consumption of soap, and its removal by a softening process is profitable for laundries or other industries using large quantities of soap.