Following four types are the most widely used recording rain gauges: Type # 1. Symon’s Rain Gauge: The Indian Meteorological Department has adopted Symon's rain gauge (Fig. 2.3). A glass bottle and funnel with brass rim are put in a metallic cylinder such that the top of the cylinder is 30.5 cm above the ground level. Rain water falls into [...]
Hydrology is the science of water which deals with the spatial and temporal characteristics of the earth's water. In other words, hydrology is the study of water in all its phases, including the occurrence, movement, distribution, circulation, storage, exploration, development and management. The atmospheric air always contains moisture. Under favourable conditions, this moisture gets condensed and water drops are formed. [...]
Over a large area like watershed (or catchment) of a stream, there will be several such stations, and the average depth of rainfall over the entire area can be estimated by one of the following methods: 1. Arithmetic Mean Method: This is the simplest method in which average depth of rainfall is obtained by obtaining the sum of the depths [...]