The Ukai Dam, the largest reservoir of Gujarat, is built on the river:

The Ukai Dam is built across the Tapi (Tapti) river near the village of Ukai in the Tapi district of Gujarat, about 100 km from Surat.

Key facts:

• It is an earth-fill and masonry dam, about 4.9 km long and 80.7 metres high.
• Construction was completed in 1972.
• Its reservoir, the Vallabh Sagar, is the largest reservoir in Gujarat by storage capacity.
• The project provides irrigation, hydroelectric power (about 850 MW, including a hydro station) and flood control.
• It supplies water to the Ukai Thermal Power Station and to the city of Surat.

Floods in Surat:

• Surat lies on the Tapi near its mouth and has suffered serious floods.
• In August 2006, heavy rains in the catchment forced authorities to release a large volume of water from the Ukai Dam, which flooded most of Surat and caused major damage.
• After this, better flood forecasting and dam management systems were introduced.

About the Tapi river:

• It rises at Multai in the Betul district of Madhya Pradesh, in the Satpura Range.
• It flows westward through Madhya Pradesh, Maharashtra and Gujarat, about 724 km, and enters the Gulf of Khambhat near Surat.
• It flows through a rift valley, parallel to the Narmada.
• Its main tributaries include the Purna, Girna, Panjhra and Waghur.

Other dams of Gujarat:

Sardar Sarovar (Narmada), Dharoi (Sabarmati), Dantiwada (Banas) and Shetrunji.

Why not the other options?

• ✗The Narmada has the Sardar Sarovar Dam in Gujarat.
• ✗The Sabarmati has the Dharoi Dam.
• ✗The Banas has the Dantiwada Dam in Gujarat.