Report filed on behalf of Greater Chennai Corporation regarding pollution of Adyar estuary. Under the Chennai Rivers Restoration Trust (CRRT) project of eco restoration of Cooum river, construction of compound wall, boundary fence of the Cooum river have been taken up for a length of 23.92 km for preventing encroachments and preventing dumping of garbage and solid wastes. So far 20.54 km length of compound wall has been completed.

Order of the National Green Tribunal (Southern Zone, Chennai) in the matter of Kannappan Vs The Tamil Nadu Coastal Zone Management Authority & Others dated 28/04/2023.

Tamil Nadu Tourism Development Corporation was directed by the National Green Tribunal (NGT) to remove the constructions put by them without any clearance from Mudaliyarkuppam village, Cheyyur taluk, Chengalpattu district of Tamil Nadu. The constructions included toilets, compound walls along the banks of the Tazhuthali Kuppam estuary in the area between the water body and the sea.

Interacting storm surges and high water runoff can cause compound flooding (CF) in low-lying coasts and river estuaries. The large-scale CF hazard has been typically studied using proxies such as the concurrence of storm surge extremes either with precipitation or with river discharge extremes. Here the impact of the choice of such proxies is addressed employing state-of-the-art global datasets.

The Cretaceous greenhouse climate was accompanied by major changes in Earth’s hydrological cycle, but seasonally resolved hydroclimatic reconstructions for this anomalously warm period are rare. We measured the δ18O and CO2 clumped isotope Δ47 of the seasonal growth bands in carbonate shells of the mollusc Villorita cyprinoides (Black Clam) growing in the Cochin estuary, in southern India.

Original Source

We used a first-of-its-kind comprehensive scenario approach to evaluate both the vertical and horizontal response of tidal wetlands to projected changes in the rate of sea-level rise (SLR) across 14 estuaries along the Pacific coast of the continental United States. Throughout the U.S. Pacific region, we found that tidal wetlands are highly vulnerable to end-of-century submergence, with resulting extensive loss of habitat. Using higher-range SLR scenarios, all high and middle marsh habitats were lost, with 83% of current tidal wetlands transitioning to unvegetated habitats by 2110.

Order of the National Green Tribunal (Western Zone Bench, Pune) in the matter of Roshni B. Patel Vrs. Union of India & Others regarding construction of bridge over Tena Creek without CRZ clearance, Gujarat, 19/09/2017.

Physical forcing of cyclonic phenomenon on water quality often exerts stress on marine and estuarine ecosystems due to their unpredictability. The post-cyclonic changes in phytoplankton biomass have been reported in the Bay of Bengal. In addition, cyclones also intensify physical processes resulting in entrainment of nutrient-rich water from deeper depths into surface leading to regional phytoplankton blooms.

Original Source

Order of the National Green Tribunal (Western Zone Bench, Pune) in the matter of Roshni B. Patel Vs Union of India & Others dated 04/09/2017 regarding the construction of the bridge over the Tena creek and road in the intertidal zone without obtaining prior CRZ Clearance from the Gujarat coastal zone management authority. Committee constituted to look into the environmental damage done and steps for remediation.

Regulating fluvial systems by dams, barrages and construction of inter-basin link canals, has severe impacts on fish populations across the world’s rivers. In India, all major fluvial systems are interrupted by a series of barriers. This includes small weirs to large dams and salt-water barriers preventing saline incursion to the estuarine lakes.

Original Source

The phenomenon of low dissolved oxygen (known as hypoxia) in coastal ocean system is closely related to a combination of anthropogenic and natural factors. Marine hypoxic occurs in the Yangtze Estuary, China with high frequency and long persistence. It’s known that it related primarily to organic and nutrient enrichment influenced by river discharges and physical factors, such as water mixing. In this paper, a three-dimensional hydrodynamic model was coupled to a biological model to simulate and analyze the ecological system of the East China Sea.

Pages