Posted by Pandit Patil on 03 Dec 2013 at 11:45

Additional Chief Programme Coordinator

BAIF DEVELOPMENT RESEARCH FOUNDATION, PUNE

Hi this is Pandit Pandit from India and I am working in watershed development project. Recently we have undertaken a watershed of 1000 hector for development. We need to calculate the total runoff from this watershed as a part of water balance study. I am looking out for some good and reliable methods to estimate the total runoff from this area. The average rainfall of the region is 2500 mm and the soil is sandy loam to loam , with slope of 5 to 30 %..

Hope to get some good suggestions, thank you.

This is an excellent way for calculation the runoff, I know calculating runoff correctly is the key factor for the water balance study. I suggest you to read about HydroCAD and try to use it. The link for the calculator is http://www.hydrocad.net/runoff.htm

they use rational method, you must try.

2. Peak Discharge Method

3. Tabular Method (TR-55)

4. Unit Hydrograph Method

1. volumetric gauging

2.float gauging

3. impellor current meter

4. electromagnetic current meter

5. ultrasonic (doppler) flow meter

6. acoustic doppler current profiler (ADCP)

7. dilution gauging

But all these devices are used for a stream flow and must be available in market.