Water Levels Surge at Rajasthan Bisalpur Dam as Triveni River Inflow Offers Relief to Jaipur, Ajmer, and Tonk

Following heavy rainfall in Chittorgarh, Rajsamand, and Bhilwara, the Triveni River gauge touched 3.70 meters, boosting Bisalpur Dam's water level by over 25 centimeters in 48 hours.

Fresh water inflows into Rajasthan's major reservoir, Bisalpur Dam, have rekindled hopes for sustained drinking water supplies across the state. Incessant heavy rainfall across key catchment districts including Chittorgarh, Rajsamand, and Bhilwara has triggered a heavy surge in the Triveni River. The river is currently flowing at a gauge level of 3.70 meters, pushing a massive volume of water into the reservoir. As a direct result, the water level at Bisalpur Dam has risen by over 25 centimeters in the span of just 48 hours, bringing immense relief to municipal supply networks.

Current Storage Metrics and Capacity Breakdown
Bisalpur Dam has an official maximum storage capacity of 315.50 RL meters. Official data recorded through Thursday evening indicates that the reservoir's water elevation reached 313.82 RL meters. This places the current water level exactly 1.68 meters below its maximum threshold. Consequently, the reservoir is currently filled to approximately 70 percent of its total volume. With the Triveni River maintaining a strong steady discharge into the basin, hydrologists expect the storage volume to expand further over the coming days.

Monsoon Delays and August Overflow Outlook
The monsoon season began on a sluggish note across primary catchment territories such as Bhilwara, Rajsamand, Udaipur, and Bengu, where early seasonal rainfall remained below average. This weak start resulted in a very gradual inflow during the initial phase of the rainy season. With approximately 74 days of the monsoon season already elapsed, only around 35 days remain in the active window. Weather department forecasts project relatively weak monsoonal activity over the next two weeks. Furthermore, the dam still requires an estimated 300 MQM of additional water to spill over. Given these conditions, full capacity overflow before the end of August remains unlikely.

Overflow Legacy: 8 Spills Since 1996
Constructed in 1996, Bisalpur Dam carries a notable operational history, having reached full capacity and spilled over on eight distinct occasions. The dam gates were opened for the first time in 2004. Subsequent overflow events were recorded in 2006, 2014, twice in 2016, 2022, and most recently in 2024. Historical records reveal that August accounts for the vast majority of spill events, with gates opened six times during that month, compared to once in September and once in July. In 2024, early heavy downpours forced the gates to open in July, presenting a stark contrast to the current season's slower accumulation.

Lifeline for 1 Crore Residents in Jaipur, Ajmer, and Tonk
Bisalpur Dam functions as the primary drinking water lifeline for urban and rural populations across Jaipur, Ajmer, and Tonk districts. The facility supplies approximately 1,100 MLD of treated water daily to meet the essential needs of nearly 1 crore people. Current storage levels guarantee an uninterrupted drinking water supply for approximately one full year. The ongoing influx from the Triveni River further strengthens regional water security for the upcoming months.

What this means for you
Across Rajasthan: Heavy rainfall in catchment areas has strengthened water storage across key state reservoirs.

In Jaipur, Ajmer, and Tonk: The rising water level at Bisalpur Dam secures drinking water supplies for nearly 1 crore residents for the next year.

Questions & Answers

1. What is the current water level at Bisalpur Dam?
As of Thursday evening, the water level at Bisalpur Dam reached 313.82 RL meters, which is 1.68 meters below its full capacity of 315.50 RL meters.

2. Why is the Triveni River inflow crucial for Bisalpur Dam?
The Triveni River is the primary inflow source for Bisalpur Dam. With the river gauge reaching 3.70 meters, the dam's water level rose by over 25 centimeters in 48 hours.

3. Which cities depend on Bisalpur Dam for drinking water?
Bisalpur Dam supplies nearly 1,100 MLD of treated water daily to meet the drinking water needs of around 1 crore residents in Jaipur, Ajmer, and Tonk.

4. How many times has Bisalpur Dam overflowed since its construction?
Constructed in 1996, the dam gates have been opened 8 times in its history, with August witnessing 6 of those overflow instances.

5. Is Bisalpur Dam expected to overflow by the end of August?
The dam requires roughly 300 MQM more water to overflow, making full capacity by late August unlikely due to forecasted weak monsoonal activity over the next two weeks.

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