Explanation: The Periyar River is the largest river in the state of Kerala, India. It is a significant waterway that plays a crucial role in the geography, economy, and ecology of the region. The river originates from the Anamudi peak in the Western Ghats, which is the highest peak in South India. The Periyar River flows through several districts, including Idukki, Ernakulam, and Thrissur, before finally draining into the Laccadive Sea.
The Periyar River is approximately 244 kilometers long, making it the longest river in Kerala. It is a vital source of water for irrigation, drinking, and hydroelectric power generation. The river basin is home to diverse flora and fauna, including several endangered species. The Periyar River is also an important site for tourism, with the Periyar Wildlife Sanctuary and the Periyar Lake being popular attractions.
In contrast, the other rivers mentioned in the options are also significant but are shorter in length. The Neyyar River, which is about 56 kilometers long, flows through the districts of Thiruvananthapuram and Kollam. The Pamba River, approximately 175 kilometers long, flows through Idukki and Pathanamthitta districts. The Chaliyar River, about 169 kilometers long, flows through Malappuram and Kozhikode districts.
Understanding the major rivers of Kerala is essential for comprehending the state's geography, hydrology, and environmental management. The Periyar River, being the longest, holds a special place in the context of Kerala's rivers and is a key focus in studies related to the state's natural resources and ecological systems.