OCR Text |
Show ( -which which which ) the heights of the river 28 are ( obtained obtaiiied ) . In ( con con- con ) nection with the gauging station ( measurements measiireinents ) are made of the discharge . The discharge is measured by determining the width , the depth and the velocity . And knowing the width , depth , ( and aud ) the velocity the discharge in cubic feet per second is obtained . ( "When When When ) that is referred to a gauge height some sort of relation is obtained from which the daily flow throughout the year is maintained . The ( Geological Greological ) Survey ( main main- main ) tains gauging stations on all the rivers of the country . ( R . 147 . ) A recording instrument ( re- re ) cords the height of the water , the same as a ( tempera tempera- tempera ) ture graph ( might i-night inight ) record the temperature , through the ( twenty-four twentyfour twenty-foi-ir twentyfoiir ) hours throughout the year . ( R . 147-148 . ) The depth of the water is obtained by an engineer from the local district office by means of soundings at the gauging stations . A gauging station is a fixed point on a river , generally on a certain stretch of the river , where it can be reached by the engineer at any time of the year ; it should generally be near a habitation where the gauges can be watched and , , certain structures , ( either -either either ) a cableway or a bridge , have been built , from which the flow measurements can be taken . The measurements of the ( depths depths' depths ) can be made by soundings , and the measurements of the velocity are made with a current meter at the same time the soundings are made . It is a very technical operation to determine the flow of |