Sedimentation

Order of the National Green Tribunal regarding waste disposal in Ghazipur drain, Delhi, 28/05/2025

Order of the National Green Tribunal in the matter of Residents Welfare Association Savita Vihar Vs Irrigation & Flood Control Department & Others dated 28/05/2025. The applicant raised the grievance against throwing of construction debris and sewage obstruction in the Ghazipur drain. According to the applicant this drain flows behind …

Climate change and water supplies: Options for sustaining tank irrigation potential in India

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. Although there are over 2,08,000 tanks in …

Ganga changes course in Haridwar

The Ganga in Haridwar district has shifted 500 metres from its course over the past four decades, shows a study by the Uttarakhand Space Application Centre (usac). The state government agency said erosion of the river banks maybe speeding change of course. “Half a kilometre in 36 years can be …

Probable role of sediments in blinding the rupture lessons from the 2004 SumatraAndaman earthquake

Several evidences show that during the 2004 Sumatra Andaman earthquake, the rupture in the Andaman region did not extend up to the trench. Consistent with the earthquake processes at several subduction zones of the world,

Notification on Sasthamcotta lake

Whereas Sasthamcotta lake in Kunnathoor Taluk of Kollam district is the largest fresh water lake of Kerala, source of water supply to Kollam Municipal Corporation and suburbs and is a Ramsar site deserving to be protected from pollution, sedimentation and encroachment; whereas the lake is subjected to pollution of anthropogenic …

Granularity and textural analysis as a proxy for extreme wave events in southeast coast of India

Extreme wave events of 1000 and 1500 years (radiocarbon ages) have been recently reported in Mahabalipuram region, southeast coast of India. Subsequently, we carried out extensive sedimentological analysis in regions covering a total lateral coverage of 12 km with a new archeological site as the central portion of the study …

Environmental monitoring programme on water quality 2010

Water has an overwhelming impact on all aspects of Kerala's life. Being one of the most densely populated states, a balanced use of water, without jeopardizing long-term sustainability is imperative. Monitoring qualitative changes and identifying factors leading to such changes thus becomes extremely important. Science and technology plays an important …

20 months of despair

Victims of the 2008 Kosi flood in Bihar are awaiting compensation. They cannot farm because their land is full of fine silt. Officials in the flood-affected districts say villagers complain because they don’t understand the formalities—they need to furnish a first information report (fir) and death certificate to claim compensation. …

Long-term stability of global erosion rates and weathering during late-Cenozoic cooling

Reports that the geological record of erosion indicates a fourfold increase in global sedimentation rates during the past 5 million years merited a global explanation. Explanations offered include an increased rate of mountain formation and global cooling. Now Jane Willenbring and Friedhelm von Blanckenburg reanalyse original data sets and use …

Climatology of the Eastern Arabian Sea during the last glacial cycle reconstructed from paired measurement of foraminiferal

Paired measurements of Mg/Ca and ?18O of Globigerenoides sacculifer from an Eastern Arabian Sea (EAS) sediment core indicate that sea-surface temperature (SST) varied within 2

New life for the Dead Sea?

A conduit from the Red Sea could restore the disappearing Dead Sea and slake the region

Phosphate oxygen isotopic evidence for a temperate and biologically active Archaean ocean

It had been thought that ocean temperatures during the early Archaean (around 3.5 billion years ago) were between 55 and 85

Silent streams

Freshwater animals are vanishing faster than those on land or at sea. But captive-breeding programs hold out hope.

The Nile delta's sinking future

As Egypt celebrates the 50th anniversary of the start of the construction of the Aswan High Dam, some scientists say that this wonder of engineering is contributing to an environmental catastrophe that could force millions of its citizens to abandon the lush, fertile delta. The worst of these is coastal …

Clearing the waters: a focus on water quality solutions

This report from the United Nations Environment Programme addresses the urgency of controlling pollution and preserving water quality around the world. Uses case studies to illustrate both problems and solutions and details key recommendations to improve and protect water quality for the international community, national governments, communities and households. The …

Using fallout 210Pb measurements to estimate sedimentation rate in Lam Phra Phloeng dam, Thailand

The Lam Phra Phloeng dam was constructed in 1963 and is located in the Nakhon Ratchasima province. The dam has severely reduced water level caused by deforestation and agriculture at the upper land. Sediment cores were collected using a gravity corer. The 210 Pb activities were measured using alpha and …

Comparative assessment of micro-watershed silt load with morphological parameters to evaluate soil conservation strategies

The comparative assessment of morphologic runoff and annual silt load from micro-watersheds can help in establishing relationships between these parameters with objectives of controlling runoff, conservation of soil, reduction of reservoir silt load and enhanced groundwater resources in the micro-watersheds. The automated watershed delineation technique using the filled digital elevation …

Sedimental attraction

Deltas around the world are either eroding or have stopped progressing. Climate change, sea level rise, flood management measures take the blame. Since a delta is formed where a river meets a standing body of water, there is talk about diverting more water and sediments into the bay to save …

Probable agricultural biodiversity heritage sites in India: The Brahmaputra Valley Region

The Brahmaputra Valley region has a unique landscape, with the Brahmaputra River and other rivulets running between the parallel hill ranges. The valley gets flooded during the monsoons, which deposit a large amount of silt and debris on the riverbeds. The local communities have developed systems to take advantage of …

Glaciers as a source of ancient and labile organic matter to the marine environment

Coastal ecosystems are sensitive to changes in the quantity and lability of terrigenous dissolved organic matter (DOM) delivered by rivers. The lability of DOM is thought to decrease with age, but this view stems from work in watersheds where terrestrial plant and soil sources dominate streamwater DOM. Here, glaciated watersheds …

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