Karnataka Chief Minister announces funds for Mekedatu project in next budget

The Mekedatu project highlights the persistent challenges of inter-state river water disputes in India's federal structure. Under the Constitution of India, water is a State subject (State List, Entry 17), but the regulation and development of inter-state rivers and river valleys fall under the Union's purview (Union List, Entry 56) when Parliament declares it expedient in the public interest. Article 262 empowers Parliament to adjudicate such disputes, leading to the Inter-State River Water Disputes Act, 1956. The ongoing friction between Karnataka and Tamil Nadu over the Cauvery river underscores the limitations of the tribunal mechanism and the complexities of equitable water sharing, especially during deficit years. UPSC candidates should analyze the need for more cooperative federalism mechanisms, such as effective river basin organizations, to manage shared resources sustainably and preempt protracted legal battles.

The Cauvery river basin is a critical geographical and hydrological unit in southern India. Originating in Talakaveri in Karnataka, it flows through Tamil Nadu before emptying into the Bay of Bengal, supporting millions of livelihoods and extensive agriculture in both states. The proposed Mekedatu project aims to serve as a balancing reservoir to regulate water release to Tamil Nadu and provide drinking water to Bengaluru. However, downstream states often argue that such upper riparian infrastructure alters the natural flow regime, potentially violating their established usage rights. Furthermore, the article mentions the need for desilting reservoirs like Krishna Raja Sagar (KRS) and Tungabhadra. Siltation significantly reduces the storage capacity of dams, exacerbating water scarcity during droughts. Understanding the hydrology of the Cauvery basin, the impact of dams on river ecology, and the geographical principles of watershed management is essential for UPSC geography and environment sections.

The construction of large reservoirs like the proposed Mekedatu project involves substantial environmental trade-offs. The article notes the planned submergence of 5,000 hectares of forest land. This triggers the need for Compensatory Afforestation (CA) under the Forest (Conservation) Act, 1980, managed by the Compensatory Afforestation Fund Management and Planning Authority (CAMPA). CA mandates planting trees on alternative non-forest land to offset the loss of natural forest ecosystems. However, ecological studies frequently highlight that newly planted areas cannot readily replicate the biodiversity, carbon sequestration capacity, and ecological services of mature natural forests. The project will require rigorous scrutiny through the Environmental Impact Assessment (EIA) process to evaluate its impact on local flora and fauna, potential habitat fragmentation, and the displacement of communities. UPSC aspirants must balance the developmental need for water security with the imperatives of environmental conservation and sustainable development.