The fossil diatoms and geochemistry of the lake water and sediments of Ambazari Lake, Nagpur were studied. The diatoms assemblages with the characteristics of different salinity regimes and pH have been identified
and grouped from the bottom (unit I) to the top (unit III) of the core. Units I

A number of hydel projects and other schemes diverting water in the Ganga

Great effort continues to focus on ecosystem restoration and reduction of nutrient inputs thought to be responsible, in part, for declines in estuary habitats worldwide. The ability of environmental policy to address restoration is limited, in part, by uncertainty in the relationships between costly restoration and benefits.

Water erosion caused by accelerated anthropogenic activities has been perceived as the major source of sediment flow in Himalayan catchments. Keeping this in view, the sediment flux data measured at the outlet
of the Sainj and the Tirthan watersheds in the Lesser Himalayan region was analysed.

Sedimentological and stable isotopic characteristics of sediments have been studied in a core from the south-eastern Arabian Sea containing records of the past 70 ka.

There is urgent need for publicly known norms of transparency and accountability in operation of reservoirs that are like time bombs that can explode multiple times. Bhakra exploded in 1988, Ukai in Gujarat did in Aug 2006, Hirakud did in Sep 2008, Srisailam, Tungabhadra, Upper Krishna and Damodar dams did in Sep 2009. The wrong operation of Bhakra, Pong and Tehri reservoirs in 2010 lead to avoidable floods in the downstream areas.

The annual burial of organic carbon in lakes and reservoirs exceeds that of ocean sediments, but inland waters are components of the global carbon cycle that receive only limited attention. Here the authors find that the mineralization of organic carbon in lake sediments exhibits a strong positive relationship with temperature, suggesting that warmer water temperatures lead to more mineralization and less organic carbon burial.

Each year, ocean sediments produce a quantity of methane equivalent to about half of the methane emitted to the atmosphere from all natural sources (1). Very little of the methane produced below the sea floor, however, reaches the ocean or the atmosphere; most is consumed by anaerobic microorganisms as it diffuses up through oxygen-poor (anoxic) sediments.

Emissions of African dust increased sharply in the early 1970s, but the human contribution to land degradation and dust mobilization remains poorly understood. Now, a 3,200-year record of dust deposition off northwest Africa has been constructed.

Climate change will affect water supplies in south Asia, where high-intensity floods and droughts are expected in the future. Increasing water storage is a key adaptation strategy, and the experience of irrigation tanks illustrates both the potential and challenges of this adaptation response.

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