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albuminoid amount analyses artesian August average basin beds Blue clay bottom Branch bridge Canadian Canyon cent channel clay considerable contains County course cover Creek curves December deep deposits depth discharge east eastern effluent estimates experiments February feet filter flow formation Gage height gallons Geology given gravel greater hard inches increase irrigation January July June less lignite located lower March material matter maximum mean measurements miles miles south million mountains northern observations obtained occur organic oxygen period places Plains plant Potomac precipitation present probably pump record region removed River rocks sand sandstone second-feet September septic sewage shales shallow solids southern springs station stream supply surface tank Tertiary thick tion underground waters United valley varying velocity water resources western White
Seite 22 - Second-feet per square mile" is the average number of cubic feet of water flowing per second from each square mile of area drained, on the assumption that the run-off is distributed uniformly both as regards time and area. "Run-off in inches...
Seite 71 - ... publications of the United States Geological Survey consist of ( 1 ) Annual Reports, (2) Monographs, (3) Professional Papers, (4) Bulletins, (5) Mineral Resources, (6) Water-Supply and Irrigation Papers, (7) Topographic Atlas of United States — folios and separate sheets thereof, (8) Geologic Atlas of the United States — folios thereof. The classes numbered 2, 7, and 8 are sold at cost of publication; the others are distributed free.
Seite 24 - The right way to dispose of town sewage is to apply it continuously to land, and it is only by such application that the pollution of rivers can be avoided.
Seite 23 - Maximum" gives the mean flow for the day when the mean gage height was highest. As the gage height is the mean for the day, it does not indicate correctly the stage when the water surface was at crest height and the corresponding discharge was consequently larger than . given in the maximum column. Likewise, in the column headed "Minimum" the quantity given is the mean flow for the day when the mean gage height was lowest. The column headed "Mean" is the average flow in cubic feet for each second...