 The Tapi basin extends to the total area of 65, 145 sq km, which is approximately 2.0% of the total geographical area of India.The main tributaries of the Tapi river are Purna, The Girna, The Panjhra, The Vaghur, the Bori and the Aner.According to the legends, Tapi river also known as Tapti, is the daughter of Surya (the Sun God).