Water level

Leh, India Apr 12, 2021 ALN: The water levels in the Periyar and Vaigai dams are currently a matter of concern for local authorities and residents alike, as both dams are significantly below their permissible limits. The Periyar dam, which is one of the largest reservoirs in the region, currently stands at a water level of 126.30 feet. This is notably lower than the permissible level of 142 feet, indicating a shortage of water that may impact agricultural activities, drinking water supply, and hydroelectric power generation.

The Periyar dam, located in the Western Ghats of Tamil Nadu, serves as a critical water source for various purposes, including irrigation, drinking water supply, and electricity generation. It is part of the Periyar River system, which is fed by monsoon rains and tributaries from the surrounding hills. However, the current water level indicates a significant shortfall, raising alarms about the sustainability of water resources in the region.

In addition to the low water level, the Periyar dam is experiencing a complete lack of inflow, which means that no additional water is entering the reservoir from upstream sources. The dam is currently discharging water at a rate of 100 cusecs, which further exacerbates the situation as the outflow continues without any replenishment. The combined storage in the Periyar dam has been reported to be 6,296 million cubic feet (mcft), which raises serious concerns regarding the availability of water, especially as the region prepares for the upcoming dry months.

Meanwhile, the Vaigai dam is also facing challenges with its current water level recorded at 63.62 feet, which is below the permissible level of 71 feet. Unlike the Periyar dam, the Vaigai dam is experiencing a slight inflow of five cusecs, although it is discharging water at a much higher rate of 72 cusecs. This imbalance between inflow and outflow indicates that the Vaigai dam is also at risk of reaching critically low levels if the situation does not improve. The Vaigai river, which is fed by the Vaigai dam, is crucial for irrigation in the surrounding agricultural areas, further emphasizing the need for immediate attention to this issue.

Recent Rainfall Data

In an effort to understand the broader context of these water levels, it is important to look at recent rainfall data across various locations in the region. Over the past 24 hours, rainfall measurements have been recorded as follows:

• Viraganoor: 38 mm
• Kallandhiri: 12 mm
• Andipatti: 9.8 mm
• Kodaikanal: 9.6 mm
• Manjalar dam: 7 mm
• Gudalur: 5.2 mm
• Periyar dam: 4.4 mm
• Sothuparai dam: 4 mm
• Thekkadi: 3.2 mm
• Madurai: 3 mm
• Shanmuganathi dam: 2.3 mm

While it is evident that some areas have received substantial precipitation, the overall impact on the water levels in both the Periyar and Vaigai dams has been minimal. This suggests that the rainfall may not have been sufficient to significantly replenish the reservoirs or that the timing and distribution of the rainfall were not conducive to increasing inflow into the dams. The region's topography and the nature of the rainfall—whether it was steady and prolonged or intense but brief—can greatly affect how much water is absorbed into the ground and reaches the reservoirs.

The lack of substantial inflow into the dams is particularly alarming as it can lead to a series of implications for the region. Water scarcity can severely affect agricultural productivity, especially in a primarily agrarian economy where farmers depend heavily on irrigation systems fed by these dams. The agricultural sector in Tamil Nadu relies on these water bodies for irrigation, especially during the dry season when rainfall is scarce. The looming water shortage may compel farmers to reduce their cultivated area or shift to less water-intensive crops, potentially affecting food security and local economies.

Additionally, the diminished water levels can impact the local ecosystem, leading to adverse effects on wildlife and plant life that rely on stable water sources. Aquatic ecosystems in and around the dams may suffer from reduced habitat availability, which can lead to declines in fish populations and other wildlife that depend on these water bodies for survival. Such ecological impacts can have far-reaching consequences, including disruptions to local fishing industries and biodiversity loss.

Furthermore, the energy sector may also feel the repercussions of low water levels in the dams. The Periyar dam, in particular, is known for its hydroelectric power generation capabilities. Reduced water availability can lead to lower electricity generation, potentially resulting in power shortages for local residents and industries. This could subsequently affect economic activities and overall quality of life in the region. With rising energy demands, especially during peak seasons, the reliance on hydroelectric power makes the situation even more critical.

Conclusion

The current water levels in both the Periyar and Vaigai dams are concerning, particularly given the nil inflow reported. The rainfall data, while showing some localized precipitation, has not been sufficient to alleviate the water scarcity issues facing these vital reservoirs. Continued monitoring of rainfall and water levels will be essential to manage water resources effectively in the region. Local authorities may need to implement water conservation measures and consider alternative water sourcing strategies to mitigate the impact of these low water levels on agriculture, drinking water supply, and energy generation.

As the region progresses into the dry months, proactive measures will be crucial in ensuring that water resources are utilized efficiently and that the community is prepared to face the challenges posed by potential water scarcity. Engaging with local farmers, educating the public on water conservation practices, and investing in sustainable water management solutions will be key components in addressing the ongoing water crisis and safeguarding the region’s water future. Collaboration between government bodies, non-governmental organizations, and local communities will be essential in formulating effective strategies to combat water scarcity and ensure the resilience of both the agricultural sector and local ecosystems in the face of changing climatic conditions.