GENERAL GEOLOGY

Detailed explanation-1: -Rivers that flow for only a short time after a rainstorm, and for the rest of time, usually most of the time, their beds are dry is called an ephemeral river.

Detailed explanation-2: -Episodic rivers: Rarely occurring rivers formed from runoff channels in very dry regions. Perennial rivers: Rivers that have a constant stream-flow throughout the year, usually located in more humid climates where rainfall exceeds evaporation rates.

Detailed explanation-3: -Flood caused due to overflow of river due to excessive rainfall which causes a river to exceed its capacity is called flood.

Detailed explanation-4: -A stream that has flowing water only during or for a short duration after precipitation events in a typical year.

Detailed explanation-5: -Seasonal rivers are the rivers which flow only in rainy seasons and remain dry mostly. Seasonal rivers of India are Godavari, Krishna, Cauvery of South India.