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 …

Projected increase in hydropower production in India under climate change

Hydropower is a valuable renewable energy resource in India, which can help in climate change mitigation and meet the increasing energy demands. However, the crucial role of climate change on hydropower production in India remains unexplored. Here using the observations and model simulations, we show that seven large hydropower projects …

Groundwater depletion causing reduction of baseflow triggering Ganges river summer drying

In summer (pre-monsoon) of recent years, low water level among the last few decades, has been observed in several lower Indian reaches of the Ganges (or Ganga) river (with estimated river water level depletion rates at the range of −0.5 to −38.1 cm/year between summers of 1999 and 2013 in …

Future climate and runoff projections across South Asia from CMIP5 global climate models and hydrological modelling

This paper presents future climate and runoff projections for the South Asia region under the RCP8.5 scenario with climate change informed by 42 CMIP5 GCMs. Runoff is projected for 0.5° grids using hydrological models with future climate inputs obtained by empirically scaling the historical climate series. Original Source

Hydrological impacts of moderate and high-end climate change across European river basins

To provide a picture of hydrological impact of climate change across different climatic zones in Europe, this study considers eight river basins: Tagus in Iberian Peninsula; Emån and Lule in Scandinavia; Rhine, Danube and Teteriv in Central and Eastern Europe; Tay on the island of Great Britain and Northern Dvina …

Water for productive and multifunctional landscapes

The SIWI/SWH Cluster Group on Water in the Landscape has examined how hydrology affects the productivity of landscapes, and what hydrological aspects need to be considered when restoring landscapes for sustainable production. In this report the cluster group identifies key aspects of successful landscape management that can contribute to achieving …

District-level assessment of the ecohydrological resilience to hydroclimatic disturbances and its controlling factors in India

The carbon and water cycles play an important role in ecosystem functioning and are linked to each other through different physical and biological processes. The hydroclimatic disturbances such as droughts affect both hydrological as well as the ecological processes. Increasing hydroclimatic disturbances under climate change will adversely affect the ecohydrological …

UNESCO and AfDB supports BIOPALT project, safeguards natural resources

The stakeholders and partners of the project BIOsphere and Heritage of Lake Chad (BIOPALT) met in N'Djamena from 28 to 31 May 2018 to discuss their collaboration for the implementation of the project. Launched on 28 February 2018, the BIOPALT project aims to strengthen the capacity of the member states …

Rainfall seasonality on the Indian subcontinent during the Cretaceous greenhouse

The Cretaceous greenhouse climate was accompanied by major changes in Earth’s hydrological cycle, but seasonally resolved hydroclimatic reconstructions for this anomalously warm period are rare. We measured the δ18O and CO2 clumped isotope Δ47 of the seasonal growth bands in carbonate shells of the mollusc Villorita cyprinoides (Black Clam) growing …

NGT intervention sought to save dried up Narmada

Bharuch/Surat: Environment and citizens groups in Bharuch have knocked the doors of the National Green Tribunal (NGT) seeking urgent directions for release of adequate water from the Sardar Sarovar dam into downstream of Narmada in wake of the rapidly drying up riverbed that could potentially result in an ecological disaster. …

Emerging trends in global freshwater availability

Freshwater availability is changing worldwide. Here we quantify 34 trends in terrestrial water storage observed by the Gravity Recovery and Climate Experiment (GRACE) satellites during 2002–2016 and categorize their drivers as natural interannual variability, unsustainable groundwater consumption, climate change or combinations thereof. Several of these trends had been lacking thorough …

Forest response to rising CO2 drives zonally asymmetric rainfall change over tropical land

Understanding how anthropogenic CO2 emissions will influence future precipitation is critical for sustainably managing ecosystems, particularly for drought-sensitive tropical forests. Although tropical precipitation change remains uncertain, nearly all models from the Coupled Model Intercomparison Project Phase 5 predict a strengthening zonal precipitation asymmetry by 2100, with relative increases over Asian …

Projected changes in precipitation, temperature, and drought across California’s hydrologic regions in the 21st century

This study investigated potential changes in future precipitation, temperature, and drought across 10 hydrologic regions in California. The latest climate model projections on these variables through 2099 representing the current state of the climate science were applied for this purpose. Changes were explored in terms of differences from a historical …

Push for study on hydel project

Guwahati: The standing committee of the National Board for Wildlife (NBWL) has called for initiating a comprehensive study on the hydrology and ecology of the Demwe hydel power project in Arunachal Pradesh before it can be given final clearance. The decision was taken at the 48th meeting of the standing …

Study on the driving mechanism of hydrologic drought In Karst Basin based on landform index: A case study of Guizhou, China

In recent years, hydrological droughts in the Karst Basins have become more frequent and have caused serious ecological and environmental problems. This paper took the karst drainage basin of Guizhou, China as the study area to analyze the geomorphologic distribution and the temporal-spatial variations of hydrological droughts. Original Source

Guildelines for preparation of DPR for flood management works

These guidelines for preparation of Detailed project report for flood management works primarily deals with structural part of flood management. These guidelines deliberated on the outlines of the detailed project report for flood management works for timely appraisal and clearance to provide relief to the flood affected people.

Numerical groundwater flow modeling of Kohat basin : An example from Himalayan fold and thrust belt Pakistan

The present and future groundwater availability and exploitation were evaluated for an intermountain basin (Kohat Sub basin) of Northwest Himalayan Fold & thrust belt Pakistan by developing a 3D numerical groundwater flow model. The groundwater models attempt to represent an actual groundwater system with a mathematical counterpart. The conventional groundwater …

Predicting urban reservoir levels using statistical learning techniques

Urban water supplies are critical to the growth of the city and the wellbeing of its citizens. However, these supplies can be vulnerable to hydrological extremes, such as droughts and floods, especially if they are the main source of water for the city. Maintaining these supplies and preparing for future …

Using a hydrological model to simulate the performance and estimate the runoff coefficient of green roofs in semiarid climates

Green roofs offer a series of benefits to buildings and to the urban environment. Their use in dry climates requires optimizing the choice of their components (i.e., vegetation, substrate and drainage layer) for the specific local climatic conditions, in order to minimize irrigations needs while preserving the attributes of the …

Resilient governance of water regimes in variable climates: Lessons from California’s hydro-ecological zones

Highly variable water regimes, such as California’s, contain distinctive problems in the pursuit of secure timing, quantities and distributions of highly variable flows. Their formal and informal systems of water control must adapt rapidly to forceful and unpredictable swings on which the survival of diversified ecosystems, expansive settlement patterns and …

Modelling vadose zone processes for assessing groundwater recharge in semi-arid region

Normally groundwater recharge is estimated using methods based on water balance, water table fluctuations, fixed factor of annual rainfall and tracer movement. In many of these methods water stored in the vadose zone and evapotranspiration are not accounted properly. These factors control groundwater recharge to a large extent, particularly in …

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