These Indian Rivers Vanish for Months: Here’s Why They Return Only In Monsoon

By late May, the bed of the Vedavathi River in parts of central Karnataka lies bare.

People walk across it on foot. Cattle graze where water flowed just months earlier. In nearby weekly markets, traders speak of rain as something everyone is waiting for.

Then the southwest monsoon arrives.

Rainwater rushes down from the hills and, within days, the dry channel begins to flow again.

Farmers gather along its banks to judge how much water has come. Seed sellers report brisk business. Fishing nets, packed away through summer, return to use.

Across India’s peninsular belt, this cycle repeats itself every year.

Some rivers are not meant to flow throughout the year. They return with the rains and fade when the monsoon leaves.

The rivers that follow rain

Geographers call them seasonal or ephemeral rivers.

Unlike glacier-fed rivers such as the Ganga, Beas and Ravi, which receive water from snowmelt and groundwater through the year, seasonal rivers depend almost entirely on rainfall.

That is why many rivers in peninsular India behave differently.

Take the Luni River, which rises in the Aravalli hills and flows through western Rajasthan. For much of the year, large stretches of its channel remain dry. It comes alive mainly during the monsoon.

Or consider the Banas River, the largest tributary of the Chambal, whose smaller feeder streams swell only when the rains arrive.

In Karnataka, tributaries of the Tungabhadra, such as the Vedavathi, follow the same pattern.

Their source is not glaciers or permanent lakes.

It is the sky.

Why they stop flowing

The answer lies beneath the riverbed.

A river can flow year-round only if its channel intersects the groundwater table — the underground layer where water is stored.

In perennial rivers, groundwater continues feeding the channel even when there is no rain.

In seasonal rivers, the groundwater lies much deeper.

Once the rains stop, surface runoff disappears and there is no underground supply to keep the water moving.

This is common across the Deccan Plateau, where rivers such as the Palar in Tamil Nadu and parts of the Pennar basin often run low or dry outside the monsoon season.

Their flow depends on what falls from above, not what rises from below.

The role of rock

Much of southern and central India sits on hard basalt and granite formations. These rocks do not absorb rainwater deeply or quickly. During heavy rainfall, water runs off rapidly across the surface.

That is why rivers such as the Sabarmati in Gujarat, or tributaries feeding the Mahanadi, can experience sudden surges during the monsoon.

But the same landscape stores less water underground.

The result is a short but intense period of flow — one that shapes how communities live and farm.

When the river comes back

In Rajasthan, the monsoon transforms the Luni basin. Dry scrublands turn green. Farming begins in floodplains. Local markets fill with bajra, cluster beans and fodder crops.

In Rayalaseema, where the Pennar and its smaller streams shape agricultural cycles, the first rains often determine whether groundnut sowing can begin.

In Tamil Nadu, villages along the Palar wait for recharge. When the river carries rainwater, nearby shallow wells refill more quickly.

Seasonal rivers may flow for only a few months, but they influence everything around them.

They shape the calendars of farmers, fishers and traders.

Not lesser, just different

India’s rivers tell two different stories.

The north is home to perennial rivers such as the Ganga, Jhelum and Sutlej, fed by glaciers and snowfields. Much of the south and west depends on rain-fed systems shaped by the monsoon and the geology beneath them.

Seasonal rivers cannot provide year-round irrigation or drinking water on their own. Communities have long responded by building tanks, stepwells and reservoirs to store the water these rivers bring for a brief period.

But these rivers carry an important lesson.

A river may disappear from sight for months. Yet when the clouds gather and the rains return, it finds its way back — and with it comes the life that depends on it.

Sources:

‘Revival of non-monsoon flows in rivers’: by K G Vyas, Published on 24 February 2020

‘Punjab is a land of rivers. But the floods of this year are not purely natural events’: by Gurinder Kaur, Published on 5 September 2025

‘Barriers in Protecting and Restoring Seasonal Rivers in Gujarat: A Planning Perspective’:  by By Elets News Network, Published on 22 November 2023

Disclaimer : This story is auto aggregated by a computer programme and has not been created or edited by DOWNTHENEWS. Publisher: thebetterindia.com