Weighing bucket rain gauge working | Diagram |

 Weighing bucket rain gauge

This gauge (Fig. 1.) has a system by which the rain that falls into a bucket set on a platform is weighed by a weighing device suitably attached to the platform. The increasing weight of rain water in the bucket moves the platform. This movement is suitably transmitted to a pen which makes a trace of accumulated amount of rainfall on a suitably graduated chart wrapped round a clock driven revolving drum. The rainfall record of this gauge is in the form of a mass curve of rainfall (Fig. 2.). The slope of this curve at any given time gives the intensity of rainfall at that time.

Fig 1. Weighing bucket rain gauge

 

Fig.2. Rainfall record of bucket rain gauge (mass curve of rainfall)