. Water Supply and Irrigation Papers of the United States Geological Survey . 4 5 6 7 *-hh- 8 ^A * 4 * u v H Si rJi * ».A * «■ *J « fi. PRICE PENTA-RECORDING CURRENT METERS. INTRODUCTION. 23 measurements before and after each flood the stations of this classgive nearly as good results as those of class 1. As it is seldom pos-sible to make measurements covering the time of change at floodstage, the assumption is often made that the curves before and afterthe flood converged to a common point at the highest gage heightrecorded during the flood. Hence the only uncertain period occursduring the fe
. Water Supply and Irrigation Papers of the United States Geological Survey . 4 5 6 7 *-hh- 8 ^A * 4 * u v H Si rJi * ».A * «■ *J « fi. PRICE PENTA-RECORDING CURRENT METERS. INTRODUCTION. 23 measurements before and after each flood the stations of this classgive nearly as good results as those of class 1. As it is seldom pos-sible to make measurements covering the time of change at floodstage, the assumption is often made that the curves before and afterthe flood converged to a common point at the highest gage heightrecorded during the flood. Hence the only uncertain period occursduring the few days of highest gage heights covering the period ofactual change in conditions of flow. For illustrative examples ofstations of this type see Water-Supply Paper 246. Class 3 includes most of the current-meter gaging stations main-tained by the United States Geological Survey. If sufficient meas-urements could be made at stations of this class results would beobtained nearly equaling those of class 1, but owing to the limitedfunds at the disposal of the Survey this is manifestly impossible,nor is it necessary for the uses to whi
Size: 1794px × 1392px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookidwatersupplyi, bookyear1910
