Context:
More than 300 trekkers were rescued in a 7-hour operation near the Kalu River in the Malshej Ghat area after heavy rains caused a sudden rise in water levels. The incident highlighted gaps in safety measures within eco-tourism zones.

About the Kalu River

What is the Kalu River?
The Kalu River is a monsoon-fed river that originates in the Kalsubai–Harishchandragad Wildlife Sanctuary, flowing through the Sahyadri mountain ranges before eventually merging with the Ulhas River.

Origin and Course:

• Source: The river begins at Tolar Khind (Pass) near Harishchandragad Peak, close to the Pimpalgaon Joga Dam in Pune district.
• Flow: It moves westward, creating the scenic Kalu Falls near Savarne–Malshej Ghat and passing through Khireshwar village.
• Confluence: The river meets the Doifodi at Saralgaon and later joins the Bhatsa River near Ambivali.
• Mouth: It finally merges into the Ulhas River near Atali village, which drains into Vasai Bay of the Arabian Sea.
• Drainage System: Part of the west-flowing Konkan drainage basin.

Key Features:

• Geological Transition: The river cascades down from the Deccan Plateau to the Konkan region, forming impressive waterfalls like the 1,200-foot-high Kalu Falls.
• Ecological Significance: Flows through rich forests within the Kalsubai–Harishchandragad Sanctuary, home to wildlife such as leopards, snakes, and unique plant species.
• Water Flow Diversion: Experts suggest that the Kalu River diverts flows from the upper Mula River, which may reduce water availability in Ahmednagar and Marathwada regions.
• Tourism: Its natural beauty attracts many visitors, but the rugged terrain, sudden flash floods, and slippery paths make the area risky for trekkers.
• Socio-Hydrological Impact: Despite heavy rainfall in the region, much of Konkan’s excess water drains unused into the sea, underscoring the need for better water management and diversion infrastructure.

Source: Free Press Journal