Hydrology

Order of the National Green Tribunal regarding floating hotel in Tehri Lake, 10/02/2025

Order of the National Green Tribunal in the matter of News item titled "Uttarakhand HC License expired why is floating hotel running?" appearing in the Times of India dated 07.01.2024. The MA was registered on the basis of the report dated June 14, 2024 filed by the National Mission for …

Why do Gangetic rivers aggrade or degrade?

The rivers draining the Gangetic plains exhibit remarkable geomorphic diversity, and this has consequently characterized the rivers to be dominantly aggradational in the Eastern Gangetic Plains (EGP) and degradational in the Western Gangetic Plains. We suggest that steam power and sediment supply are the two main fluvial parameters which govern …

Climate change impacts on water resources in India

Water is important for economic development, and many parts of India already face issues of water scarcity. This study predicts that intensity of rainfall will increase under climate change. Issues such as water scarcity may also become more prevalent. The marked rise in precipitation intensity and variability in extremes will …

Atmospheric brown clouds: Impacts on South Asian climate and hydrological cycle

South Asian emissions of fossil fuel SO2 and black carbon increased 6-fold since 1930, resulting in large atmospheric concentrations of black carbon and other aerosols. This period also witnessed strong negative trends of surface solar radiation, surface evaporation, and summer monsoon rainfall. These changes over India were accompanied by an …

Atmospheric brown clouds: Impacts on South Asian climate and hydrological cycle

South Asian emissions of fossil fuel SO2 and black carbon increased 6-fold since 1930, resulting in large atmospheric concentrations of black carbon and other aerosols. This period also witnessed strong negative trends of surface solar radiation, surface evaporation, and summer monsoon rainfall. These changes over India were accompanied by an …

Hydrological impact study of Tipaimukh dam of India on Bangladesh

The main objective of this study can be asserted as to assess the probable impacts, which are likely to be happened due to the operation of proposed Tipaimukh Hydro Electric Dam (Multipurpose) Project of India by storing, regulating, withdrawal or diversion of the Barak River flow on the northeast region …

Can payments for environmental services help reduce poverty? An exploration of the issues and the evidence to date from Latin America

This paper examines the main ways in which Payments for Environmental Services (PES) might affect poverty. PES may reduce poverty mainly by making payments to poor natural resource managers in upper watersheds. The extent of the impact depends on how many PES participants are in fact poor, on the poor’s …

Impact of soil and water conservation measures on hydrology of micro watersheds in Madhya Pradesh

Soil and water conservation measures are meant to reduce soil erosion and utilize rainwater. The measures include construction of contour bunds, contour trenches, graded terraces, check dams, dugout ponds, open wells, and similar other works. Some of the works done by the agencies of the Madhya Pradesh Govt. are analyzed …

Runoff variation due to landuse change in small watersheds of Western Ghats

Western Ghats form the catchment of all the 44 rivers that sustain the agroeconomy of Kerala. A study was conducted to assess the effect of land use on runoff from small watersheds of Western Ghats. Three small mono-culture watersheds, planted with cashew, coffee, tea and one small watershed with dense …

Hydrology and sediment loading of Hokersar wetland sanctuary in the Kashmir Himalaya, India

Hydrological characteristics and sedimentation loading in Hokersar wetland of Kashmir Himalaya was monitored from November 2000 to october 2001. The compound water budget showed a substantial (91 percent) input from various surface inflows and just 9 per cent through precipitation. Major water discharge (67 per cent) occurs through surface outlets, …

Dams in the north east will also ruin livelihoods

After neglecting the north-east for years, Delhi now feels the need to initiate "developmental' activities in the region. There is good reason. Indo-Chinese ties are improving. Moreover, a sub-regional economic grouping

Evaluation of geomorphic control on flood hazard through Geomorphic Instantaneous Unit Hydrograph

Flood hazard in a basin depends upon the hydrological response of the upstream basin area. The upstream basin area may produce different amounts of run-off for a given rainfall based on its hydrologic response. The present communication shows the importance of drainage network characteristics in understanding the hydrologic response of …

Geomorphological manifestations of the flood hazard: A remote sensing based approach

Flood hazard is one of the most severe problems in the Himalayan river basins. Although floods are essentially hydrological phenomenon, the uneven distribution of floods in the river basin highlights the control of geomorphological and geological factors. A proper understanding of these factors is critical for a successful flood management …

The Northeast`s power burden

on august 30, while inaugurating a hydropower project at Omkareswar in Madhya Pradesh, Prime Minister (pm) Atal Bihari Vajpayee declared that every village in the country would be electrified by 2007 and every house illuminated by 2012. The announcement

River systems in the Gangetic plains and their comparison with the Siwaliks: A review

The Indo-Gangetic plains are drained by several fan and interfan rivers fringing the margin of the outer Himalaya. These fan and interfan river systems are distinctly different from each other in terms of hydrology and sediment transport and generate typical alluvial architecture below the plains. The Siwalik sequences stretching all …

A watershed plan

Recurrent droughts and floods coupled with mass poverty, chronic unemployment and pervasive malnutrition are the major challenges before India. The Union government usually responds by complaining about truant rains and doles out funds in an arbitrary manner. As an alternative, I propose a nationwide watershed development programme through the statutory …

Churning issue

the Supreme Court (sc) has asked the Union government to consider linking the country's rivers within 10 years, advancing the government's own deadline. Earlier, the Union ministry of water resources had filed an affidavit stating that this project, which it claimed would control flood and drought conditions, would be completed …

Scrutinising disasters

Flood Studies in India brings to fore several aspects of this natural disaster that are not yet conventional wisdom in policy circles. The book looks at floods from a variety of expertise areas, such as civil engineering, meteorology, hydrology, remote sensing, geomorphology and geography - the only way to do …

Increasing risk of great floods in a changing climate

Radiative effects of anthropogenic changes in atmospheric composition are expected to cause climate changes, in particular an intensification of the global water cycle with a consequent increase in flood risk. But the detection of anthropogenically forced changes in flooding is difficult because of the substantial natural variability, the dependence of …

Watered down

aerosols may be the culprits weakening the Earth's water cycle by reducing rainfall. This was discovered during a study conducted by researchers at the Scripps Institution of Oceanography, University of California, San Diego, usa. According to the researchers, the tiny aerosols that are primarily made up of black carbon could …

Aerosols, climate, and the hydrological cycle

Human activities are releasing tiny particles (aerosols) into the atmosphere. These human-made aerosols enhance scattering and absorption of solar radiation. They also produce brighter clouds that are less efficient at releasing precipitation. These in turn lead to large reductions in the amount of solar irradiance reaching Earth's surface, a corresponding …

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