Q. Measurement of river water levels?

In designing bridges and other engineering structures on rivers, maximum discharge and highest flood level form essential data for design purposes. If the structure is meant for harnessing river water supplies, discharge and water level observations may be required to be made more often and in certain cases even daily. Various methods used in observation of water levels and measurement of discharge are described below, based primarily on the Indian Standards cited under reference. However , for making "short term" and "long term" measurement of discharge in accordance with Khosla Committee's recommendations, proposed Manual by R.D.S.O. for "Estimation of Design Discharge" may be referred. For methods of gauging, measuring rainfall and taking discharges on bridges nominated by R.D.S.O., instructions issued by R. D. S. O. may be followed.