NASA study warns of freshwater decline in India
Washington, May 18: Availability of freshwater has declined in the northern and eastern parts of India, says a new study that combined an array of NASA satellite observations of Earth with data on human activities to map locations where freshwater is changing around the globe.
The study, published in the journal Nature, found that Earth's wetland areas are getting more wet and dry areas are getting drier due to a variety of factors, including human water management, climate change and natural cycles.
Areas in northern and eastern India, the Middle East, California and Australia are among the hotspots where overuse of water resources has caused a serious decline in the availability of freshwater, and without corrective actions by the governments to preserve water, the situation is likely to worsen in these areas, the Guardian reported this week citing the study.
The first-of-its-kind study used 14 years of observations from the US/German-led Gravity Recovery and Climate Experiment (GRACE) spacecraft mission to track global trends in freshwater in 34 regions around the world.
"This is the first time that we've used observations from multiple satellites in a thorough assessment of how freshwater availability is changing, everywhere on Earth," said Matt Rodell of NASA's Goddard Space Flight Center in Greenbelt, Maryland,
"A key goal was to distinguish shifts in terrestrial water storage caused by natural variability - wet periods and dry periods associated with El Nino and La Nina, for example - from trends related to climate change or human impacts, like pumping groundwater out of an aquifer faster than it is replenished," Rodell added.
Freshwater is found in lakes, rivers, soil, snow, groundwater and ice. Freshwater loss from the ice sheets at the poles - attributed to climate change - has implications for sea level rise.
On land, freshwater is one of the most essential of Earth's resources, for drinking water and agriculture.
The researchers found that while some regions' water supplies are relatively stable, others experienced increases or decreases.
"What we are witnessing is major hydrologic change," said co-author Jay Famiglietti of NASA's Jet Propulsion Laboratory (JPL) in Pasadena, California.
"We see a distinctive pattern of the wet land areas of the world getting wetter - those are the high latitudes and the tropics - and the dry areas in between getting dryer. Embedded within the dry areas we see multiple hotspots resulting from groundwater depletion," Famiglietti warned.
Famiglietti noted that while water loss in some regions, like the melting ice sheets and alpine glaciers, is clearly driven by warming climate, it will require more time and data to determine the driving forces behind other patterns of freshwater change.
However, the GRACE satellite observations alone couldn't tell the researchers what was causing the apparent trends.
"We examined information on precipitation, agriculture and groundwater pumping to find a possible explanation for the trends estimated from GRACE," said co-author Hiroko Beaudoing of Goddard and the University of Maryland in College Park.
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Karnataka Maritime Board announces plans for Mangaluru Water Metro Project
Mangaluru (Karnataka), Nov 4: After being endowed with multi connectivity facilities like three national highways, port and airport, Mangaluru city is now looking at a significant move towards sustainable urban mobility as the Karnataka Maritime Board (KMB) has announced plans for the Mangaluru Water Metro Project (MWMP), officials said on Monday.
This ambitious initiative aims to transform public transportation in the state, utilising National Waterways to connect areas along the Nethravathi (NW-74) and Gurupura (NW-43) rivers, they said.
Set to become India's second-largest water transport system after Kochi, the project promises an eco-friendly, economical and efficient mode of travel, the officials said.
According to officials, the MWMP will connect isolated communities from Bajal to Maravoor, enhancing accessibility and promoting the holistic development of these regions. The initiative is expected to boost local livelihoods and improve the standard of living through integrated transport networks.
According to the project report available with PTI, the MWMP will be rolled out in phases, with the initial stretch covering 30 kilometres along the Nethravathi and Gurupura river backwaters.
The priority route, beginning at Bajal on the Nethravathi and extending to the Maravoor Bridge on the Gurupura, will feature around 17 modern Metro stations.
Key locations such as Someshwara Temple, Ullal and the New Mangalore Port are included in the proposed route. State-of-the-art electric and diesel catamaran boats will be deployed, equipped with essential amenities to ensure a high standard of comfort and operational efficiency.
A comprehensive Feasibility Report (FR) will assess the project's viability, presenting a detailed cost-benefit analysis, market potential, operational strategies and environmental considerations.
"The report will objectively evaluate the project's merits and challenges, providing crucial information for decision-makers, stakeholders and investors," they said.
Officials in the port and fisheries subdivision told PTI that key areas of analysis has been based on assessing the potential to decongest old port areas, exploring the feasibility of cargo movement using Roll-on/Roll-off (Ro-Ro) water metros, examining water level variations influenced by tidal flows, integration with feeder services to ensure seamless last-mile connectivity, demand forecasts over a 25-year period, based on extensive socio-economic research of usage and utility of the MWMP.
The project's Terms of Reference (ToR) emphasise sustainable development, involving thorough site identification, user demand assessments and environmental impact studies. Comprehensive surveys such as LIDAR mapping, bathymetric studies and topographical analysis will ensure accurate planning and implementation, the officials told.
Furthermore, technical collaborations with national institutes of repute will support studies on wave tranquillity, vessel height clearance and infrastructure recommendations for jetties and repair facilities, they said.
A detailed environmental monitoring programme will assess air and water quality, noise levels and aquatic biodiversity in line with Ministry of Environment, Forest, and Climate Change (MOEF&CC) guidelines, the officials added.
The officials of the Maritime Board said the MWMP promises significant economic and environmental benefits, from easing traffic congestion to reducing air pollution. The project will also explore non-fare revenue streams and develop models to ensure financial sustainability.
A socio-economic impact assessment will measure the project's contribution to regional development, backed by projected revenue from passenger fares and ancillary services, a senior official said.
The Board also aims at championing cleaner and greener transportation and to set a precedent for sustainable urban mobility, positioning Mangaluru as a progressive city that leverages its waterways, he added.
