The lower Varuna River basin in Varanasi district situated in the central Ganga plain is a highly productive agricultural area, and is also one of the fast growing urban areas in India. The agricultural and urbanization activities have a lot of impact on the groundwater quality of the study area. The river basin is underlain by Quaternary alluvial sediments consisting of clay, silt, sand and gravel of various grades.

At geological time scales, the role of continental erosion in the organic carbon (OC) cycle is determined by the balance between recent OC burial and petrogenic OC oxidation. Evaluating its net effect on the concentration of carbon dioxide and dioxygen in the atmosphere requires the fate of petrogenic OC to be assessed.

Nourisher of an ancient civilization, the Ganga could be gasping for its survival. Every few kilometres the water of its tributaries will be diverted to produce power. While there may not be enough flow to run the turbines, there

Ganga is one of the largest rivers of the world which supports millions of population on its banks. It is a tectonically controlled Himalayan river which also creates havoc due to perennial floods every year. Like most large river systems, it also shifts its course in the Gangetic plains in space and time.

Ganga Express Way is a project of the Uttar Pradesh Government. According to this, an eight-lane road is to be constructed along the left side of the River Ganga, between Noida and Ballia. This correspondence deals with a critical analysis of the project in amalgamation with environmental concerns. (Correspondence)

Rice-wheat is a major crop rotation in the Indo-Gangetic region. Tillage is one of the major crop production operations and is an important contributor to the total cost of production. It is a common observation that direct tilling of any crop into combine-harvested rice stubbles from a reasonable rice yield is not possible without any prior burning or removal of straw.

The Krishni–Yamuna interstream area is a micro-watershed in the Central Ganga Plain and a highly fertile track of Western Uttar Pradesh. The Sugarcane and wheat are the major crops of the area. Aquifers of Quaternary age form the major source of Irrigation and municipal water supplies. A detailed hydrogeological investigation was carried out in the study area with an objective to assess aquifer framework, groundwater quality and its resource potential.

For drylands with low inherent levels of biological productivity, coping with climate change presents particular problems. The world’s drylands cover over 40 % of the global terrestrial area and house more than 2 billion inhabitants MEA, (2005). The world’s poorest people live in these areas and they will be hit hardest by the adverse effects of climate change. The effects will manifest themselves not through increased temperatures per se but rather via changes in hydrological cycles characterised by both increased droughts and paradoxically, increased risks of flooding.