Legislative Document, Volume 14

Capa
J.B. Lyon Company, 1919

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Página 303 - 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 during the month. On this the computations for the remaining columns are based.
Página 303 - 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...
Página 303 - DEFINITION OF TERMS. . The volume of water flowing in a stream — ^the "run-off" or "discharge" — is expressed in various terms, each of which has become associated with a certain class of work. These terms may be divided into two groups — (1) those...
Página 303 - In the 39 miles between Belmont, in central Allegany county, and Portage, in southwestern Livingston county, the fall of the water-surface is 253 feet, an average of 6.4 feet per mile. At Portage the river plunges down in three magnificent falls and thence nearly to Mount Morris flows at the bottom of a deep gorge. From Mount Morris to Rochester the valley is broad and open and the stream is bordered by meadows subject to occasional overflow. At Rochester there is another abrupt descent over three...
Página 331 - ... mouth, Schoharie creek crosses successively the Devonian sedimentary rocks, chiefly of the Catskill, Oneonta, Ithaca and Hamilton formations. All of these may be considered fairly impervious and free from fissures. It then crosses belts of Silurian formations, including Helderberg, Salina, Xiagara and Medina sandstone and limestone.
Página 303 - Even though the monthly means for any station may represent with a high degree of accuracy the quantity of water flowing past the gage, the figures showing discharge per square mile and depth of run-off in inches may be subject to gross errors...
Página 303 - The principal sources of Hudson river lie in the wildest portion of the Adirondack mountains, in Essex county, northeastern New York. A number of branches, any one of which might possibly be considered the main stream, form its upper waters; but if the highest collected and permanent body of water be assumed as the true head, then the source of the Hudson becomes Lake Tear-of-the-Clouds...
Página 303 - Seasonal flow largely controlled by storage at Cranberry lake. Accuracy. — Stage-discharge relation practically permanent ; not affected by ice during year. Rating curve well defined between 20 and 1,200 second-feet.
Página 303 - States gallons per second; equals 448.8 gallons per minute; equals 646,317 gallons for one day. 1 second-foot for one year covers 1 square mile 1.131 feet or 13.572 inches deep. 1 second-foot for one year equals 31,536,000 cubic feet. 1 second-foot equals about 1 acre-inch per hour.
Página 303 - ... at the summit and has its axis parallel to the lake .at an average distance of three-fourths of a mile from it. The lake has a water-surface area of...

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