Monsoon rainfall and its variability in Godavari river basin

Rainfall variability over a river basin has greater impact on the water res ource in that basin. With this in view, the variability of the monsoon rain fall over the Godavari river basin has been studied on different time scale s. As expected, the monsoon rainfall in Godavari basin is more variable (17 %) than the all-India monsoon rainfall (11%) during the period of study (19 51-90). Similarly, inter-annual variability of the monsoon rainfall on smal ler time scales is found to be still higher and increases while going on fr om seasonal to daily scales. An interesting observation is that the intra-s easonal variability of the monsoon rainfall has a significant negative rela tionship (CC = -0.53) with the total seasonal rainfall in the basin.