Current Dams News and Events

Current Dams News and Events, Dams News Articles.
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A groundbreaking solution? Polymers can protect buildings from large fault ruptures
University of Technology Sydney researchers have developed a solution to protect buildings sitting on deep foundations from earthquakes resulting in surface fault ruptures. Their findings show a composite foundation system using inexpensive polymer materials can significantly improve the safety of infrastructure and substantially decrease fatality and damage due to large ground deformations. (2021-02-15)

Flooding in the Columbia River basin expected to increase under climate change
The Columbia River basin will see an increase in flooding over the next 50 years as a result of climate change, (2021-02-10)

In Brazil, many smaller dams disrupt fish more than large hydropower projects
A new paper published Jan. 11 in Nature Sustainability quantifies the tradeoffs between hydroelectric generation capacity and the impacts on river connectivity for thousands of current and projected future dams across Brazil. The findings confirm that small hydropower plants are far more responsible for river fragmentation than their larger counterparts due to their prevalence and distribution. (2021-01-27)

Study finds shorter radiation regimen safe, effective for men with advanced prostate cancer
UCLA researchers found shortening a traditional 45-day course of radiation to a five-day course delivered in larger doses is safe and as effective as conventional radiation for men with high-risk forms of prostate cancer. (2021-01-25)

Role of dams in reducing global flood exposure under climate change
A new collaborative study led by researchers at the National Institute for Environmental Studies, the University of Tokyo, and Michigan State University exposes the role of dams for mitigating flood risk under climate change. Flood is amongst the costliest natural disasters. Globally, flood risk is projected to increase in the future, driven by climate change and population growth. The role of dams in flood mitigation, previously unaccounted for, was found to decrease by approximately 15% the number of people globally exposed to historical once-in-100-year floods, downstream of dams during the 21st century. (2021-01-22)

Ageing dams pose growing threat: UN
By 2050, most people on Earth will live downstream of tens of thousands of large dams built in the 20th century, many of them already operating at or beyond their design life, according to a UN University analysis. (2021-01-22)

Brazilian dam collapse could have been predicted with right monitoring technology
One of Brazil's worst environmental disasters - a dam collapse that also killed more than 200 people - could have been foreseen with latest satellite radar imaging technique, according to a new study by the University of Nottingham and Durham University. (2021-01-20)

Beavers may help amphibians threatened by climate change
A study of pond sites in the Cascades found greater amphibian diversity in sites with beaver damns. Red-legged frogs and northwestern salamanders, which develop more slowly, were detected almost exclusively in dammed sites. (2020-12-08)

New research identifies 'triple trouble' for mangrove coasts
Some of the world's most valuable ecosystems are facing a ''triple threat'' to their long-term durability and survival, new research shows. (2020-11-10)

Spring-run and fall-run Chinook salmon aren't as different as they seem
Historically, spring-run and fall-run Chinook salmon have been considered as separate subspecies, races, ecotypes, or even as separate species of fish. A new genetic analysis, however, shows that the timing of migration in Chinook salmon is determined entirely by differences in one short stretch of DNA in their genomes. (2020-10-29)

Data tool helps users manage water resources, protect infrastructure
River systems are essential resources for everything from drinking water supply to power generation - but these systems are also hydrologically complex, and it is not always clear how water flow data from various monitoring points relates to any specific piece of infrastructure. Researchers have now developed a tool that draws from multiple databases to help resource managers and infrastructure users make informed decisions about water use on river networks. (2020-10-07)

Dams exacerbate the consequences of climate change on river fish
A potential response of river fish to environmental changes is to colonize new habitats. But what happens when dams and weirs restrict their movement? And are native and alien species similarly affected? Researchers from the Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB) and the Spanish University of Girona (UdG) have addressed these questions in a recent study. (2020-09-14)

Land use change leads to increased flooding in Indonesia
While high greenhouse gas emissions and biodiversity loss are often associated with rapid land-use change in Indonesia, impacts on local water cycles have been largely overlooked. Researchers from the University of Göttingen, IPB University in Bogor and BMKG in Jakarta now show that the expansion of monocultures, such as oil palm and rubber plantations, leads to more frequent and more severe flooding. The results have been published in the journal Ecology & Society. (2020-08-27)

New study provides valuable historical dataset for Yellow River water management
Researchers led by Prof. LIU Yu from the Institute of Earth Environment of the Chinese Academy of Sciences and their collaborators reconstructed natural runoff history for the middle reach of the YR from 1492 to 2013 CE to assess the effects of human activities. (2020-07-27)

Heat stress in gestating dairy cows impairs performance of future generations
In a recent article appearing in the Journal of Dairy Science, scientists from the University of Florida and the University of California, Davis investigated the performance and profitability of two future generations of cows born to mothers exposed to heat stress during pregnancy. (2020-07-16)

1.5 billion people will depend on water from mountains
Global water consumption has increased almost fourfold in the past 100 years, and many regions can only meet their water demand thanks to essential contributions from mountain regions. In 30 years, almost a quarter of the world's lowland population will strongly depend on runoff from the mountains. Only sustainable development can ensure the important function of mountain areas as Earth's ''water towers''. (2020-07-07)

Long-term consequences of river damming in the Panama Canal
Humans have manipulated and managed rivers with dams for millennia. The number of river dam projects is predicted to rise sharply in the future, especially in the tropics where demand for hydroelectricity and water is accelerating. What are the long-term impacts of dams on highly biodiverse tropical forests? Scientists at the Smithsonian Tropical Research Institute (STRI) and collaborating institutions turned to The Panama Canal for answers. (2020-07-03)

Beavers are diverse forest landscapers
Beavers are ecosystem engineers that cut down trees to build dams, eventually causing floods. Beaver-induced floods make forest landscapes and habitats increasingly diverse, but very little is known about the long-term effects of beavers on European landscapes. Researchers at the University of Eastern Finland and the University of Helsinki examined the history and occurrence of beaver-induced floods and patch dynamics in southern Finland. They used a unique dataset of field observations from 1970 to 2018. (2020-06-10)

Individualized mosaics of microbial strains transfer from the maternal to the infant gut
Researchers have used a microbiome 'fingerprint' method to report that an individualized mosaic of microbial strains is transmitted to the infant gut microbiome from a mother giving birth through vaginal delivery. They detailed this transmission by analyzing existing metagenomic databases of fecal samples from mother-infant pairs, as well as analyzing mouse dam and pup transmission in a germ-free, or gnotobiotic, mouse model, where the dams were inoculated with human fecal microbes. (2020-05-08)

Fly ash geopolymer concrete: Significantly enhanced resistance to extreme alkali attack
Fly ash generated by coal-fired power stations is a global environmental headache, creating groundwater and air pollution from vast landfills and ash dams. The waste product can be repurposed into geopolymer concrete, such as precast heat-cured structural elements for buildings. However, a critical durability problem has been low resistance to extreme alkali attack. UJ researchers found that high temperature heat-treatment at 200 degrees Celsius can halve this harmful mechanism in fly ash geopolymer concretes. (2020-05-06)

Dams in the upper Mekong River modify nutrient bioavailability downstream
Chen et al. shed new light on the effects of hydropower dams on nutrient cycling and ecosystem functioning. The study on the cascade reservoirs along the upper Mekong River demonstrated that hydropower reservoirs increased downstream bioavailability of nitrogen and phosphorus, stimulated phytoplankton abundance and shifted the dominant species from diatoms in the silicon-rich upstream channel to green algae in downstream reservoirs. (2020-03-17)

A dam right across the North Sea
A 475-km-long dam between the north of Scotland and the west of Norway and another one of 160 km between the west point of France and the southwest of England could protect more than 25 million Europeans against the consequences of an expected sea level rise of several meters over the next few centuries. (2020-02-28)

Hydropower dams cool rivers in the Mekong River basin, satellites show
Using 30 years of satellite data, UW researchers discovered that within one year of the opening of a major dam in the Mekong River basin, downstream river temperatures during the dry season dropped by up to 3.6 degrees F (2 degrees C). (2020-02-13)

Proposed hydropower dams pose threat to Gabon's fishes
Proposed hydropower dams in Gabon pose a substantial threat to the African nation's most culturally and economically important fishes, according to a new study. (2020-02-05)

World's first public database of mine tailings dams aims to prevent deadly disasters
GRID-Arendal has launched the Global Tailings Portal, a new public, searchable database with detailed information on more than 1,700 mine tailings dams around the world. The data are based on disclosures provided by mining companies following a request from the Church of England Pensions Board and the Swedish National Pension Funds' Council of Ethics. The portal is designed to be used by scientists, governments, insurers, the finance community, the mining industry, media, and civil society. (2020-01-24)

Platypus on brink of extinction
New UNSW research calls for national action to minimise the risk of the platypus vanishing due to habitat destruction, dams and weirs. (2020-01-21)

Study: Humanity's footprint is squashing world's wildlife
Using the most comprehensive dataset on the 'human footprint,' which maps the accumulated impact of human activities on the land's surface, researchers from WCS, University of Queensland, and other groups found intense human pressures across the range of a staggering 20,529 terrestrial vertebrate species. (2020-01-13)

Salmon lose diversity in managed rivers, reducing resilience to environmental change
The manipulation of rivers in California is jeopardizing the resilience of native Chinook salmon. It compresses their migration timing to the point that they crowd their habitats. They may miss the best window for entering the ocean and growing into adults, new research shows. (2019-12-13)

Model probes possible treatments for neonatal infection, a common cause of infant death
Extremely premature infants are at risk for life-threatening infections called late-onset sepsis, or LOS, that spread into their bodies from the intestine. Researchers now report a new model for LOS, and they show that disrupting the normal maturation of gut microbes can make newborn mouse pups highly susceptible to LOS. Furthermore, they found they could prevent the deadly infection by giving the pups specific protective bacteria before a challenge with invasive Klebsiella pneumoniae bacteria. (2019-12-02)

Fish size affects snake river salmon returns more than route through dams
The survival and eventual return of juvenile Snake River salmon and steelhead to spawning streams as adults depends more on their size than the way they pass through hydroelectric dams on their migration to the ocean, new research shows. (2019-11-25)

UT mathematician develops model to control spread of aquatic invasive species
Adjusting the water flow rate in a river can prevent invasive species from moving upstream and expanding their range. An applied mathematician at the University of Tennessee, Knoxville, has developed a partial differential equation model to find the desired flow rate to reduce invasive populations. (2019-11-21)

AI could transform how we monitor the structural health of civil infrastructure
The University of Surrey and King's College London have developed a new machine learning algorithm (AI) that could transform the way we monitor major infrastructure - such as dams and bridges. (2019-11-18)

Scientists studied the reasons for plant extinction in different world regions
A team of Russian researchers from Tyumen State University together with foreign colleagues studied the cases of plant extinction in world biodiversity hotspots and coldspots. The study covered about 15% of the Earth's surface and included the data collected over the past 300 years. The reasons for plant extinction were different in the regions with different biodiversity level. (2019-11-05)

AI helps reduce Amazon hydropower dams' carbon footprint
A team of scientists has developed a computational model that uses artificial intelligence to find sites for hydropower dams in order to help reduce greenhouse gas emissions. (2019-09-19)

Numerical simulations probe mechanisms behind sand dune formation
After noticing how the construction of dams significantly alter the hydrodynamics of natural rivers and the resulting downstream riverbed evolution, researchers decided to apply numerical simulations to help determine what's at play in the relationship of sediment motion and flow conditions. (2019-09-10)

Beaver reintroduction key to solving freshwater biodiversity crisis
Reintroducing beavers to their native habitat is an important step towards solving the freshwater biodiversity crisis, according to experts at the University of Stirling. (2019-08-26)

Religion associated with HPV vaccination rate for college women
A survey of female college students finds 25% had not been vaccinated for HPV and religion may be a contributing factor. (2019-08-19)

88% decline of big freshwater animals
Scientists from the Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB) and international colleagues have now quantified the global decline of big freshwater animals: from 1970 to 2012, global populations of freshwater megafauna declined by 88% -- twice the loss of vertebrate populations on land or in the ocean. Large fish species are particularly affected. (2019-08-08)

Pregnancy problems may lead to later cardiac trouble in adult children
A new study in Cardiovascular Research finds that female offspring of females with polycystic ovary syndrome have an increased risk for developing cardiac dysfunction. (2019-08-05)

How 'natural-killer' cells might help women avoid a deadly risk of childbirth
Malfunctioning uterine NK cells play a key role in placenta accreta, a condition that leads to over-attachment of the placenta to uterine tissues and can cause extensive bleeding during childbirth. In mouse models, scientists at Cincinnati Children's trace the NK cell malfunction to a mutant form of the protein Gab3, and demonstrate that healthy NK cell transplants can prevent accreta. (2019-08-02)

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