Articles tagged with Floods
Heavy rainfall and strong storms affected the southern U.S. on March 9, with over a foot of rain falling in Texas to Arkansas. The GPM satellite measured extreme precipitation rates, including 148 mm in one powerful storm.
New research reveals that global warming will increase rainfall in dry regions, but the additional water may not be available due to increased evaporation. This could lead to more frequent and intense flash flooding events in areas without adequate infrastructure.
Heavy rainfall caused flooding and landslides in northern Peru, with NASA's Integrated Multi-satellitE Retrievals for GPM (IMERG) measuring extreme rainfall totals of over 700 mm. The strong El Niño was partially blamed for the abnormally high rainfall.
A new method quantifies monetary losses from coastal floods under sea-level rise, showing that damage costs consistently increase at a higher rate. The study provides estimates of average annual costs of sea-level rise over longer time periods, helping policymakers assess adaptation measures.
A study found that public administrations in Germany rely on their own experiences in shaping participatory processes, rather than adopting best practices from other states. They also draw on experience from adjacent policy areas to optimize their processes.
A study by University of Stirling scientists found beaver dam building skills improve stream habitats, increasing species diversity by 28% and reducing pollutants. Beaver dams also store flood water and increase organic matter retention.
University of Exeter researchers present world-leading studies on climate tipping points and glacial lake outburst floods, shedding light on early warning signals and their implications for global action. The research aims to provide insights into the social and policy implications of these critical thresholds.
A recent study by the University of California, Davis, found that levees can actually increase flood risk for up to a third of residential structures and 22% of commercial structures behind them. The research team estimated long-term flood risk, probabilities of levee failure, and resulting economic losses in the Sny Island levee distr...
Scientists found that recent developments near the Meramec River, including a levee and landfill, significantly magnified flood levels. The study showed that floods are becoming more chaotic, unpredictable, and severe due to human activities such as development in floodways and floodplains.
A study by Oxford University scientists found that human-induced climate change increased the risk of severe storms in the south of England, leading to devastating flooding. The analysis attributed the increase in extreme rainfall to thermodynamic changes in the atmosphere and westerly air flow.
RapidScat satellite revealed sustained winds of 45 meters per second along the coast of southern New Jersey, causing flooding. The Moderate Resolution Imaging Spectroradiometer (MODIS) instrument on NASA's Aqua satellite captured a visible-light image showing a blanket of snow stretching from Massachusetts to Missouri.
Researchers used social media data from Twitter and Flickr to identify hotspots in need of aid during the 2013 Colorado floods. The team's innovative approach combined remote sensing imagery with machine-learning algorithms to quickly analyze images and pinpoint areas affected by flooding.
The Headwaters Diversion system, built to protect agricultural lands from overflow and Ozark Plateau runoff, has increased peak flow of Mississippi River water and led to increased flooding. Climate scientists predict a continued pattern of extreme rainfall events, exacerbating the issue.
NASA analyzed rainfall totals in Paraguay and found the highest amounts occurred northeast of Asuncion, with over 400 mm recorded in central and southern parts. The strong El Niño phenomenon is believed to be the cause of the heavy flooding, affecting over 150,000 people across Argentina, Brazil, Paraguay, and Uruguay.
The NASA GPM mission analyzed extreme weather in the US from December 2015, detecting heavy rainfall, tornado outbreaks, and record-breaking flooding. The analysis revealed a line of tornadic thunderstorms moving through the Midwest, generating two tornadoes and 14 deaths.
The 2011 flood caused by Tropical Storm Lee had a significant impact on the geomorphology of several large watersheds in north-central Pennsylvania. Channel widening and bank erosion were common, and huge volumes of gravel were transported during the flood. The study suggests that part of the reason for these changes was related to the...
A massive low pressure system generated severe weather, including tornadoes, heavy rainfall, and snow, in the southwestern and central US. The storm system brought significant impacts, particularly to Texas, Oklahoma, New Mexico, Missouri, Arkansas, Mississippi, Alabama, and the Florida Panhandle.
Geologists have discovered a unique landform in the Wabash River Valley that was formed by erosion from melting glacier floodwaters. The finding provides insight into how floodwaters may behave as glaciers continue to melt today, with potential effects on surrounding landscapes.
The US Pacific Northwest experienced extreme rainfall from Dec. 2 to 9, 2015, with areas receiving over 160 mm of rain and the open waters of the Pacific Ocean seeing totals over 310 mm. This heavy moisture was attributed to atmospheric rivers originating in the Western Pacific Ocean.
The Federal Emergency Management Agency has granted a $750,000 program to enhance coastal resilience in Texas. The program aims to improve community planning and outreach, using tools like CHARM, to mitigate the impact of weather hazards.
Amar Flood's team at IU has created a tricarb molecule that self-assembles into flower-shaped crystalline patterns, a breakthrough in materials science. The team plans to use computer-aided design software to virtually experiment with millions of molecular compounds, reducing the time and cost of creating new materials.
Researchers have developed a new approach to recover flood frequency and magnitude data from temperate lakes, providing new sources of paleohydrological information. The study uses sediment dynamics to establish relationships between river discharge and deposit preservation, helping model and mitigate future flood risk.
A new study provides a quantitative estimate of the effects of continental flood basalts on climate, vegetation, and oceans during the time of the dinosaurs. The researchers found that temperatures would cool by as much as 4.5 degrees Celsius due to volcanic gas emissions but return to normal within 50 years after an eruption ceased.
Heavy flooding in southeastern India has caused at least 70 reported deaths, with Chennai experiencing exceptionally high casualties. NASA's Integrated Multi-satellite Retrievals for GPM (IMERG) data indicate rainfall totals of over 200mm in large areas of Tamil Nadu and northern Sri Lanka.
NASA's RapidScat instrument gathered wind speed and direction data on the storm's remnants over the western Gulf of Mexico. The data showed strongest sustained winds near 80.5 mph/129.6 kph north and west of the center, contributing to heavy rainfall and flash flooding in Texas and other Gulf Coast states.
Hurricane Patricia broke records as the strongest eastern North Pacific hurricane on record, with a minimum central pressure of 880 millibars and maximum sustained winds near 200 mph. The storm is expected to produce catastrophic impacts in southwestern Mexico, including life-threatening flash floods and mudslides.
Typhoon Koppu brought extreme heavy rainfall to the Philippines, causing deadly flooding and mudslides. The GPM satellite data showed most of Luzon received over 300mm of rain, with some areas reaching 760mm.
Floodwaters in Vermont (2011) and Colorado (2013) highlighted the impact of downstream increases and decreases in stream power on erosion and sedimentation. The study successfully predicted river channel and floodplain responses in almost 90% of cases, revealing the potential role of downstream changes in stream power.
Researchers found a dramatic increase in major storm occurrence along the New York City and New Jersey coast over the last 1,000 years. The combined effects of sea-level rise and changing hurricane characteristics have raised the likelihood of devastating flooding.
A new study quantifies the synergy of sea-level rise and big coastal storms, projecting a 4-75 fold increase in flood index across the US East coast by 2100. The combined effects of these two climate hazards could produce alarming spikes in flooding, with projections suggesting a 35 to 350 times increase in the Northeast.
Tropical Depression 16E made landfall in northwestern Mexico on September 21, bringing heavy rainfall and threatening life-threatening flash floods. The depression is expected to produce 3-5 inches of rain across the northern Baja California peninsula and Sonora, with isolated amounts of up to 12 inches possible.
Twin tropical cyclones brought catastrophic rainfall to Japan, causing widespread flooding, landslides, and over one million evacuations. NASA's GPM Core satellite provided critical rainfall data, showing Honshu received over 100mm of rain, with extraordinary totals near the south-central coast.
Research from Harvard University suggests that flooding for hydroelectric development can increase methylmercury levels in Arctic ecosystems by up to 200 percent. The study found that freshwater from melting ice mixing with salt water creates a feeding zone for plankton that accumulates mercury and magnifies its effects on the food chain.
NASA's GOES-East satellite tracked Tropical Storm Erika's movement from August 27 to August 29, showing its weakening as it passed through the Leeward Islands and into the Eastern Caribbean Sea. The storm's remnants are expected to produce heavy rainfall across portions of the Dominican Republic, Haiti, and eastern Cuba through Sunday.
Scientists created adjustable weirs to simulate flooding levels, allowing for realistic study of coastal wetland impacts. The low-cost approach provides a more accurate representation of natural conditions than traditional mesocosm studies.
Researchers found that massive storm systems can cause devastating tsunami-type waves, like in Typhoon Haiyan. The 'surf beat' phenomenon occurs when long wave groups approach shallow areas, breaking and transporting water onshore.
A new model suggests that wealthy countries' ability to mitigate flood risks through investments will be unsustainable in the long term. As a result, they may experience similar flood risk levels as developing countries.
A study found that simulated seawater flooding significantly reduced growth of sensitive vegetable seedlings. Salt-tolerant varieties like spinach, eggplant, and tomato showed less damage, with some experiencing a 43-67% reduction in photosynthetic rate after two weeks.
Researchers from ASU's School of Sustainability and surrounding institutions are developing holistic methods to assess urban infrastructure resilience. The team aims to incorporate natural systems into designs, creating 'safe-to-fail' scenarios that balance social, ecological, and technical needs.
USF researchers found that storm surge, high rainfall, and rising sea levels contribute to devastating 'compound flooding' in coastal cities. Their analysis identified key mechanisms, including elevated water levels and moderate storm surges, which exacerbate flooding impacts.
Tropical Storm Nangka caused the evacuation of over 200,000 people in Japan and is moving towards the Sea of Japan. The storm's wind speed decreased to 40 mph as it moved northeastward, with forecasters predicting its dissipation in a day or two.
Scientists found a clear upward trend in unprecedented daily rainfall events globally, consistent with rising global temperatures. The average increase is 12% globally, but 56% in South East Asia.
A new study from Washington University in St. Louis suggests that federal agencies are underestimating historic 100-year flood levels on major rivers in the Midwest by as much as five feet. This miscalculation has serious implications for future flood risks, flood insurance, and business development in an expanding floodplain.
NASA's Aqua satellite captured a visible image of Tropical Depression Bill's remnants over the central United States on June 18. The storm is expected to bring significant rainfall and flash flooding to the eastern two-thirds of the US, including sections of Arkansas, Missouri, Illinois, Indiana, Ohio, Louisiana, and Texas.
Tropical Depression Bill moved north-northeast through the southern U.S., affecting eastern Texas and Oklahoma. NASA satellites provided infrared, visible, and rainfall estimates for the storm's progression, while NWS forecasts heavy rain accumulations of 4-12 inches across several states.
Hurricane Carlos has caused coastal complications for western Mexico residents as it weakened and re-strengthened to hurricane force. The storm's compact structure and strong thunderstorms tightly circling the center have extended hurricane-force winds up to 10 miles from the center.
A new study reveals that humans deliberately caused about a third of floods in southwestern Netherlands between 1500 and 2000. The deliberate flooding was used as a tactic during the Eighty Years' War, with significant changes to the landscape resulting from these inundations.
Researchers at UT Austin study computational models and simulations of hurricanes like Ike to predict storm surge and flooding consequences. Advanced tools in high-performance computing are used to improve simulation accuracy.
Record-breaking floods hit central Texas and Oklahoma, with the Blanco River reaching a new crest of over 40 feet in Hays County. The floods are attributed to persistent widespread storms across the Southern Plains, fueled by El Nino.
A Queensland University of Technology study has found that flood victims experienced more psychological distress during the rebuilding phase than as waters inundated their homes and businesses. Aftermath stress was the strongest predictor of post-traumatic stress symptoms, with insurance company issues being a major contributor.
A new study shows that Colorado's extreme precipitation events can happen in any season and at all elevations across the state. The research found that high-elevation intense precipitation events have occurred in all months of the year, including summer, when that precipitation is more likely to be rain and therefore more of a flood risk.
A new database of coastal flooding in the UK has been launched, providing crucial information to prevent future flooding events. The 'SurgeWatch' database contains data on 96 large storms and their impact on UK coastlines.
NASA predicts more severe weather for the Midwest, including tornadoes, flash flooding, and strong winds. The storm system is expected to bring heavy rain and hail, with cold air masses indicating strong convective storms.
A study found that local media played a sensitive role in helping West Cumbrian communities cope with traumatic events, while national media was often invasive. The research showed that communities responded positively to local support and shared experiences.
Researchers found eight major flood events in the central Mississippi River valley that contributed to Cahokia's emergence and decline. The study suggests that floods disrupted agricultural settlement patterns, leading to increased population density and farming intensity.
Researchers from UMass Amherst found that about 10% of released water may be permanently lost, reducing downstream river flows. This 'hydropeaking' practice allows hydropower dams to operate more efficiently, but comes with a tradeoff: permanent water loss affecting aquatic life and ecosystems.
A computer modeling analysis led by UC Irvine scientists found that levee detonations in 2011 reduced the risk of flooding in a city upstream. The study showed that allowing levees to overtop naturally would have resulted in less erosion and similar damage to crops and buildings.
A new study projects that large coastal populations in Asia and Africa will face the highest exposure to future sea level rise and storm surge flooding. Coastal areas with high population density, such as China, India, and Indonesia, are most vulnerable.
Researchers developed a new hydrological model to predict the extent of flash flooding by analyzing rainfall patterns at the hillslope scale. The model reveals that certain frequencies of rainfall can amplify runoff and lead to more severe flooding.
Researchers at Penn University developed a new model of sediment transport in rivers, showing that even calm rivers creep forward slowly due to particle interactions. The study improves geologists' ability to predict erosion rates and landscape evolution over time.