The largest river of all the west flowing rivers of the peninsular India is:

West Flowing Rivers of The Peninsular India

The west flowing rivers of the Peninsular India are fewer and smaller as compared to their east flowing counterparts.

The two major west flowing rivers are the Narmada and the Tapti.

This exceptional behavior is because these rivers didn̢۪t form valleys and instead they flow through faults (linear rift, rift valley, trough) created due to the bending of the northern peninsula during the formation process of Himalayas.

These faults run parallel to the Vindhyas and the Satpuras.

The Sabarmati, Mahi and Luni are other rivers of the Peninsular India which flow westwards.

Hundreds of small streams originating in the Western Ghats flow swiftly westwards and join the Arabian Sea.

It is interesting to note that the Peninsular rivers which fall into the Arabian Sea do not form deltas, but only estuaries. {Fluvial Depositional Landforms}

This is due to the fact that the west flowing rivers, especially the Narmada and the Tapi flow through hard rocks and hence do not carry any good amount of silt.

Moreover, the tributaries of these rivers are very small and hence they don̢۪t contribute any silt.

Hence these rivers are not able to form distributaries or a delta before they enter the sea.

Narmada River

Narmada is the largest west flowing river of the peninsular India.

Narmada flows westwards through a rift valley between the Vindhyan Range on the north and the Satpura Range on the south.
It rises from Maikala range near Amarkantak in Madhya Pradesh, at an elevation of about 1057 m.

Narmada basin extends over states of Madhya Pradesh, Gujarat, Maharashtra and Chhattisgarh having an area ~1 Lakh Sq.km.

It is bounded by the Vindhyas on the north, Maikala range on the east, Satpuras on the south and by the Arabian Sea on the west.

Its total length from its source in Amarkantak to its estuary in the Gulf of Khambhat is 1,310 km.

The hilly regions are in the upper part of the basin, and lower middle reaches are broad and fertile areas well suited for cultivation.
Jabalpur is the only important urban centre in the basin.

The river slopes down near Jabalpur where it cascades (a small waterfall, especially one in a series) 15 m into a gorge to form the Dhuan Dhar (Cloud of Mist) Falls.

Since the gorge is composed of marble, it is popularly known as the Marble Rocks.

It makes two waterfalls of 12 m each at Mandhar and Dardi. Near Maheshwar the river again descends from another small fall of 8 m, known as the Sahasradhara Falls.

There are several islands in the estuary of the Narmada of which Aliabet is the largest.

The Narmada is navigable upto 112 km from its mouth.