Favorable conditions for current-meter gaging stations. Unfavorable conditions for current-meter gaging stations.. Transmission of data to Washington office. Observer's gage-height books (form 9-175) Gage-height cards (form 9-176)....... Current-meter notebooks (form 9-198) Discharge measurement cards (form 9-221) ILLUSTRATIONS Page. PLATE I. A, Cable post and car; B, Boat station.... 12 II. A, Current-meter rating station at Denver, Colo.; B, Method of mak ing discharge measurement by wading.. III. Price electric current meters with buzzers.. 4. United States Geological Survey standard chain gage 7. A good station-rating curve FIG. 1. Cable station, car, gage, etc.. 2. Method of manipulating stay line from small cable.... 3. Method of attaching stay line to meter by use of pole. 5. Cross section of small Price meter.. 6. Weight vane of small Price meter.. 8. A poor station-rating curve 9. Cross section of Saline River at gaging station near Salina, Kans. 10. Vertical-velocity curve....... LETTER OF TRANSMITTAL. DEPARTMENT OF THE INTERIOR, UNITED STATES GEOLOGICAL SURVEY, HYDROGRAPHIC BRANCH, Washington, D. C., February 1, 1904. SIR: I have the honor to transmit herewith a manuscript entitled "Hydrographic Manual of the United States Geological Survey,” and to ask that it be published as a water-supply and irrigation paper. It gives instructions for field and office work relating to gaging of streams by the use of current meters. Instructions relative to gaging streams by the use of weirs and dams will be embodied in a future edition of this manual. This manuscript has been prepared by a committee composed of Messrs. Edward C. Murphy, John C. Hoyt, and George B. Hollister. They have endeavored to bring together all available information in regard to the methods of gaging streams which have been developed by the engineers and hydrographers of the United States Geological Survey, and in so doing have, as far as possible, consulted these men. The publication is intended mainly for those engaged in hydrographic investigations for the Geological Survey. It is believed, however, that engineers and others not connected with the Government service who are interested in hydraulic problems will find it of much assistance. It is hoped, also, that teachers of civil engineering will make use of it in their courses of instruction, so that young men who enter this branch of the Government service may be familiar with the stream-gaging methods herein set forth. Very respectfully, F. H. NEWELL, Chief Engineer. Director United States Geological Survey. Hon. CHARLES D. WALCOTT, 7 |