Abstract
Precipitation or rainfall is the major factor which influences hydrological and agricultural activities of any region, but rainfall is highly dependent on atmospheric weather systems. The weather systems thus play a determinant role in the production of rainfall. Forecast of rainfall is of considerable importance to hydrologists and agriculturists for making operational decisions. As mentioned in Chapter 1 under the scope of hydrometeorology, rainfall forecast is an important input in river flow warning as well as in efficient operation of multipurpose dams. It is well known that rainfall forecast is intimately linked with the safety of dams. In the case of a heavy rainfall warning the magnitude of inflow is determined and the reservoir is operated to accommodate the incoming flood waters. Because rainfall is a highly variable weather element, one of the important aspects of rainfall forecast is to identify those physical or natural factors which have the largest influence over rainfall. If these factors that control the rainfall of any region are identified then they can be used to provide a forecast of the behavior of rainfall well in advance. For example, there is a relation between the pressure in South America and subsequent rainfall in India. If the pressure is unusually high in Argentina and Chile during March and April there is likely to be a heavy monsoon rainfall in India in the following months of July and August.
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Rakhecha, P.R., Singh, V.P. (2009). Foreshadowing Precipitation. In: Applied Hydrometeorology. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-9844-4_12
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DOI: https://doi.org/10.1007/978-1-4020-9844-4_12
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