The Godavari River System:The Godavari River is the second-longest course in India with brownish water. The river is often referred to as the Dakshin (South) Ganga or Vriddhi (Old) Ganga. It is a seasonal river, dried during the summers, and widens during the monsoons. This river originates from Trimbakeshwar, near Nasik in Maharashtra.It flows southeast across south-central India through the states of Madhya Pradesh, Telangana, Andhra Pradesh, and Orissa, and drains into the Bay of Bengal.The river forms a fertile delta at Rajahmundry.The banks of this river have many pilgrimage sites, Nasik(MH), Bhadrachalam(TS), and Trimbak. Some of its tributaries include Pranahita (Combination of Penuganga and Warda), Indravati River, Bindusara, Sabari, and Manjira.

Asia’s largest rail-cum-road bridge which links Kovvur and Rajahmundry is located on the river Godavari.

The Krishna River System:-Krishna is one of the longest rivers of India, which originates from Mahabaleshwar in Maharashtra. It flows through Sangli and drains the sea in the Bay of Bengal. The river flows through the states of Maharashtra, Karnataka, Telangana and Andhra Pradesh.Tungabhadra River is the main tributary which itself is formed by the Tunga and Bhadra rivers that originate in the Western Ghats. Dudhganga Rivers, Koyna, Bhima, Mallaprabha, Dindi, Ghataprabha, Warna, Yerla, and Music are some of the other tributaries.

The Cauvery River System:- The Cauvery is also known as Ganga of South India “Dakshin Bharat ki Ganga”. It originates from Talakaveri located in the Western Ghats.It is a famous pilgrimage and tourist place in the Kodagu district of Karnataka.The headwaters of the river are in the Western Ghats range of Karnataka state, and from Karnataka through Tamil Nadu. The river drains into the Bay of Bengal. The river supports irrigation for agriculture and is considered as a means of support of the ancient kingdoms and modern cities of South India.The river has many tributaries called Arkavathy, Shimsha, Hemavati, Kapila, Shimsha, Honnuhole, Amaravati, Lakshmana Kabini, Lokapavani, Bhavani, Noyyal, and Tirtha.

The Mahanadi River System:-The Mahanadi originates from the Satpura Range of central India and it is a river in eastern India.It flows east to the Bay of Bengal. The river drains the state of Maharashtra, Chhattisgarh, Jharkhand, and Orissa. The largest dam, the Hirakud Dam, is built on the river.

Small river system

Gujarat:

• The Shetruniji – It rises near Dalkahwa in Amreli district.
• The Bhadra – It originates near Aniali village in Rajkot district.
• The Dhadhar rises near Ghantar village in Panchmahal district.
• Sabarmati
• Mahi

Maharashtra:

• The Vaitarna rises from the Trimbak hills in Nasik district
• The Kalinadi rises from Belgaum district and falls in the Karwar Bay.
• The source of Bedti river lies in Hubli Dharwar and traverses a course of 161 km.
• The Sharavati is another important river in Karnataka flowing towards the west. The Sharavati originates in Shimoga district of Karnataka and drains a catchment area of 2,209 sq. km. The famous Jog or Gersoppa Falls (289m) made by Sharavati river are the highest untiered waterfalls in India.

Goa:

• Mandovi
• Juari

Kerala:

• Bharathapuzha – It is the largest river of Kerala. It is also known as Ponnani. It originates from Annamalai hills and flows into the Arabian Sea at a place called Ponnani.
• The Periyar – It is the longest and the second largest river of Kerala. [Largeness of a river is related to its basin size and the volume of water flowing in the river. At the same time when we say that a river is the longest, it means that we are referring to its geographical length]
• The Pamba river – It falls in the Vembanad lake.