Sediment Transport

Judgment of the National Green Tribunal regarding plywood factories operating in Yamuna Nagar, Haryana, 27/05/2025

Judgment of the National Green Tribunal, May 27, 2025 in the matter of Sumit Saini Vs Shree Ram Steel Industries & Others. Sumit Saini, resident of village Damla, District Yamuna Nagar, Haryana had sent a letter petition dated May 14, 2022 to the NGT. The application said that around 25 …

Desilted sand may turn dearer

PALAKKAD: As the sand from the Malampuzha and Chulliyar dams were quoted at Rs 2,300 per cubic metre by the highest bidder, the public at large will in effect be denied sand at reasonable price. There was also a possibility of increasing price of sand from the Bharathapuzha in the …

States dams have 37 lakh truckloads of sand!

THRISSUR: A study conducted by the Kerala Engineering Research Institute (KERI), Peechi, in 12 large and minor reservoirs in the state by using the modern Integrated Bathymetric System, has found huge accumulation of sediments, mainly consisting of sand, clay and silt, in these dams. KERI director K Kochappan told Express …

Application of numerical modelling for morphological changes in a high-energy beach during the south-west monsoon

Study of beach morphological changes during monsoon and development of capabilities towards its prediction is of vital importance in coastal zone management. A study of the beach erosion/accretion processes during south-west monsoon and its numerical modelling is attempted in this communication for a micro-tidal and high-energy beach. Comprehensive hydrodynamic and …

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 …

Siltation im Kaptai reservoir of Chittagong hill tract Bangladesh

To measure impact of ecological change in Chittagon Hill Tracts after the installation od dam Kaptai in 1955 on siltation, Bangladesh Water Development Board has conducted siltation study several times from 1978. In 1983 and 2001 more comprehensive survey was done on 67 cross sections, repeating 42 cross sections of …

Himalayan glaciers: a state-of-art review of glacial studies, glacial retreat and climate change

This paper on the state of Himalayan Glaciers by V K Raina, ex Deputy Director of GSI presents a historical review of the research to date spanning more than fifty years, and claims that it is premature to accept that Himalayan glaciers are retreating abnormally because of global warming. Monitoring …

Some common fallacies about floods and flood management

Floods are an endemic problem in India. Every major flood event is immediately followed by a flood of a different kind

Sinking deltas due to human activities

Many of the world's largest deltas are densely populated and heavily farmed. Yet many of their inhabitants are becoming increasingly vulnerable to flooding and conversions of their land to open ocean. The vulnerability is a result of sediment compaction from the removal of oil, gas and water from the delta's …

The Great avulsion of Kosi on 18 August 2008

The 18 August 2008 avulsion of the Kosi River draining the parts of north Bihar in eastern India may well be regarded as one of the greatest avulsions in a large river in recent years. The Kosi River shifted by ~120 km eastward, triggered by the breach of the eastern …

A sustainable engineering disaster

Dinesh Kumar Mishra looks back at the history of floods in North Bihar and wonders what this year has in store Had the Kosi river not breached its eastern embankment at Kusaha last year, 2008 would have gone down as a drought year in North Bihar. The rains were scanty …

A new scheme for large-scale natural water storage in the floodplains: the Delhi Yamuna floodplains as a case study

The top layer of accumulated sand washed down by floods over millions of years, makes river floodplains into giant aquifers. We propose a scheme for the natural storage of excess monsoon river-water discharge in the extensive and deep sand top layer of the floodplain of the river. The excess monsoon …

Hypsometry and erosion proneness: a case study in the lesser Himalayan watersheds

Assessment of erosion status of watersheds is an essential prerequisite for Integrated Watershed Management (IWM). It not only assists in identifying the suitable soil and water conservation measures to arrest erosion and conserve water but also helps in devising best management practices (BMPs) to enhance biomass production in watersheds. The …

Land degradation mapping in the upper catchment of river Tons

A study on land degradation in the upper catchment of river Tons, a tributary of Yamuna river, in Uttarkashi district of the Uttarakhand state, was carried out using on-screen visual interpretation of IRS LISS-III + PAN merged data. The study area, which is largely mountainous, includes Govind Wildlife Sanctuary and …

Wet and wonderful: The world’s largest wetlands are conservation priorities

Wetlands perform many essential ecosystem services—carbon storage, flood control, maintenance of biodiversity, fish production, and aquifer recharge, among others—services that have increasingly important global consequences. Like biodiversity hotspots and frontier forests, the world’s largest wetlands are now mapped and described by an international team of scientists, highlighting their conservation importance …

The 18 August 2008 Kosi river breach: an evaluation

In the Himalayan terrain, the Kosi river is formed by the confluence of seven smaller streams, viz. Indravati, Sun Kosi, Tama Kosi, Likhu Kosi, Dudh Kosi, Arun Kosi and Tamar Kosi at different places in China, Tibet and Nepal, before its entry into the Indian state of Bihar. The Kosi …

Recycling of graphite during Himalayan erosion: A geological stabilization of carbon in the crust

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 …

Engineered flood

Not excess water, but neglected embankment caused the flood India has blamed the previous seven breaches on the Kosi embankment on Nepal releasing water from the barrage at Bhimnagar, even though Nepal has no control over the sluice gates. All the earlier breaches had occurred downstream of the barrage. But …

That sinking feeling

A baffled Bihar is struggling to provide food and shelter to three million people rendered homeless by a flood that swept through five districts. The Down To Earth team travels across the areas inundated by the Kosi in Bihar and Nepal to grasp the impact and concludes that the flood …

Taming the Kosi river

Kosi, the river of sorrow of Bihar, is in the news. The news is really bad. As long expected by the professinals, embankment has breached. Fifty thousand persons in Nepal and 2.5 million in Bihar are experiencing the fury of the Kosi flood. Embankments are no solution to the flood …

  1. 1
  2. 2
  3. 3
  4. 4

IEP child categories loading...