Krishna Raj Sagara also known as KRS is lake and dam. It is located in Karnataka, India. The dam has spanning over 8500 acres. The dam is built across the River Kaveri, one of the major rivers in South India, and has been a critical source of water for agricultural and domestic purposes in the region.

The idea of constructing a dam across the River Kaveri was conceptualized in the early 20th century. The main objectives behind the project were to create a steady water supply for irrigation and drinking water and to mitigate the problem of water scarcity during dry periods. The proposal gained momentum, and in 1911, Sir M. Visvesvaraya, the then Diwan of the princely state of Mysore, submitted a detailed plan for the construction of the dam. However, it was not until 1924 that the foundation stone was laid.

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The construction of Krishna Raja Sagara dam began in 1924 and was completed in 1931. The dam was named after Krishnaraja Wadiyar IV, the then ruler of Mysore, who played a crucial role in supporting and funding the project. The dam is an example of exemplary engineering and architectural brilliance of its time.

The dam's construction involved the use of concrete and stone masonry, and it stands at an impressive height of around 49 meters (160 feet) and has a length of approximately 1,854 meters (6,083 feet). The dam has a total of 48 automatic crest gates that control the water flow and help regulate the reservoir's water levels. The reservoir has a total storage capacity of around 49,000 million cubic feet (mcft) of water.

Krishna Raja Sagara plays a vital role in meeting the irrigation needs of the region. The water from the reservoir is channeled through an intricate network of canals and distributaries, which serve as a lifeline for agriculture in the region. The fertile lands surrounding the reservoir benefit from a well-managed supply of water, allowing farmers to cultivate multiple crops throughout the year. As a result, the region has witnessed significant agricultural growth and economic development.

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Furthermore, the reservoir serves as a significant source of drinking water supply for the cities and towns in the Mandya and Mysore districts. It helps meet the domestic water requirements of the urban population and has contributed to the growth of these areas. Additionally, the reservoir also supports industries by providing a reliable water source for various industrial processes.

The construction of the Krishna Raja Sagara dam had a significant impact on the surrounding environment. While it brought prosperity to the region, it also led to the submergence of several villages and agricultural lands. The displacement of people from their ancestral lands had social and economic repercussions. The reservoir also affected the natural ecology of the region, leading to changes in the habitat and impacting local flora and fauna.

Efforts were made to address these issues, including rehabilitation and resettlement of displaced communities, and initiatives to protect and conserve the local environment. Despite these efforts, the ecological balance was altered to some extent.

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Krishna Raja Sagara has become a popular tourist destination over the years. The lush greenery surrounding the reservoir, especially during the monsoon season, attracts visitors from far and wide. Boating facilities are available, and tourists can take leisurely rides to enjoy the scenic beauty of the area. The dam also offers a picturesque view, attracting nature enthusiasts and photographers.

Krishna Raja Sagara stands as a testament to human ingenuity and engineering capabilities. Its construction has been a boon for agriculture and urban development in the region, ensuring a stable water supply for irrigation and domestic purposes. While its impact on the environment and displacement of communities cannot be overlooked, efforts have been made to mitigate the negative consequences.

 Krishna Raja Sagara remains an essential water resource for the state of Karnataka and a source of pride for the people, as it continues to support the livelihoods of millions while also offering a serene and picturesque destination for tourists and nature lovers alike.

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