The decision whether to store or recharge water depends on rainfall pattern of a particular region. For example, In places like Kerala and Mizoram, rain falls throughout the year, barring a few dry periods. In such places, one can depend on a small domestic-sized water tank for storing rainwater, since the period between two spells of rain is short. On the other hands, in dry areas like Delhi, Rajasthan and Gujarat the total annual rainfall occurs only during 3 or 4 months of monsoon. The water collected during the monsoon has to be stored throughout the year; which means that huge volumes of storage containers would have to be provided. In regions like Delhi, it is more feasible to use rainwater to recharge groundwater aquifers rather than for storage.