Gaging stations, by States, maintained during fiscal year 1905-6—Continued. The total number of river stations maintained in the fiscal year 1902-3 was 519; in 1903-4, 639; in 1904-5, 754; in 1905-6, 817. RIVER SURVEYS. Surveys to determine the slopes of streams were made during the year on the following-named rivers: Penobscot, Moose, and Androscoggin, in Maine; Roanoke, in Virginia; Black, Flambeau, and Wisconsin, in Wisconsin. SPECIAL INVESTIGATIONS. Investigations were conducted which led to reports on the following special problems: The flow of water over standard and broad-crested weirs; the use of turbines as water meters; the flow of water under an ice cover; unusual and excessive floods of the year. Progress was made in the investigation of the effect of forestation upon run-off and of the movement and control of the débris of hydraulic mining in the basin of Sacramento River. COOPERATION WITH STATES. Cooperative arrangements for hydrographic work were made with eight States. The State Survey Commission of Maine allotted $3,500; the forestry commission of New Hampshire, $300; the State of Wisconsin, $1,250; the State of California, $10,000; the State of Oregon, $2,500; the State geologist of Maryland, a sum sufficient to pay all gage readers in that State; and the State engineers of Nebraska and Nevada, each a sum sufficient to pay for the services of a hydrographer who devoted his time to stream gaging. PUBLICATIONS. The following water-supply papers were issued: 124. Report of progress of stream measurements for the calendar year 1904, pt. 1, Atlantic coast of New England drainage. 125. Report of progress of stream measurements for the calendar year 1904, pt. 2, Hudson, Passaic, Raritan, and Delaware River drainages. |