Water is essential for sustenance of all forms of life on earth. It is not evenly distributed all over the world and even its availability at the same locations is not uniform over the year. The River valley projects which are constructed to meet several objectives simultaneously or tackle various problems associated with river valleys in an integrated manner. The basic motive behind the construction of multipurpose river valley projects in India is to meet the critical requirements of irrigation for agriculture, electricity for industries and flood control. The Projects related to the rivers flowing towards the west draining into the Arabian Sea are discussed below:
• The Narmada Valley Project: This project benefits Maharashtra, Madhya Pradesh, Gujarat and Rajasthan. It consists of 29 major and 3,000 small dams. Of these, the Narmada Sagar Dam of Madhya Pradesh and the Sardar Sarovar Dam are most important.
• The Ukai Project: The Ukai power project of Gujarat equipped with power generating sets manufactured by Bharat Heavy Electricals Limited was inaugurated on October 12, 1977. It has added 540,000 KW of installed capacity to the State’s existing power network.
• The Kakrapar Project: It is situated on the Tapti near Kakrapara, 80 km upstream of Surat. The project is financed by the Gujarat Government.
• The Mahi Project: A dam has been built on the river Mahi in Madhya Pradesh under this project. The reservoir behind this dam has been named the Jamanlal Bajaj Sagar.
• The Sharavati Hydel Power Project: Located about 400 km from Bangalore near the Gersoppa falls, the Sharavati Project is one of the world’s major power projects, built by Indian engineers with American collaboration.
• The Kalindi Project: This is constructed on the river Kalindi in Karnataka.
• The Idukki Project: It is Kerala’s largest hydel power project on the river Periyar in Idukki district in Kerala.
• The Sabagiri Project: It is constructed on the river Pamba, Kerala.
• The Parimabakulam Aliyar Project: It is a joint venture of Tamil Nadu and Kerala States. It envisages construction of seven inter-connected reservoirs by harnessing rivers including two major rivers viz., Parambikulam on the western slopes of Annamalai Hills and Aliyar on the eastern slopes.
• The Pallivasal Project: It is constructed on the river Madirapuzha, Kerala.
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