Holly Michael

Director, Delaware Environmental Institute University of Delaware

  • Newark DE

Holly Michael's academic work has had a significant impact on the discipline of hydrogeology

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A year in the spotlight: University of Delaware’s most notable media mentions of 2025

In 2025, the University of Delaware had many exceptional media mentions. Here are some of the most notable.  Science coverage dominated  Where will the next big hurricane hit? Ask the sharks. (The Washington Post) – Aaron Carlisle, a marine ecologist, was featured for his revolutionary work using sharks to predict major weather events. Scientists could soon lose a key tool for studying Antarctica's melting ice sheets as climate risks grow (NBC News) – Carlos Moffat, an associate professor and oceanographer, spoke about the national budget and how it's impacting climate research.  These Katrina Survivors Feel Overlooked. Now, They’re Using TikTok to Tell Their Stories (Rolling Stone) – Jennifer Trivedi, a disaster researcher, spoke about why Hurricane Katrina was such a major story.  Malala Yousafzai, Migration and Sustainability (Forbes) – Saleem Ali, a professor of energy and environment, contributed regularly to Forbes on environmental topics.  Scientists went hunting for freshwater deep beneath the Atlantic Ocean. What they found could have global implications (CNN) – Holly Michael, a professor of Earth sciences and civil and environmental engineering, spoke about the history of freshwater.  Engineering Professor Answers Electric Car Questions (WIRED) – Willett Kempton, a professor of engineering, joined WIRED to answer the internet's most interesting questions about electric cars. Plastic shopping bag policies are actually working, a new study suggests (CNN) – Kimberly Oremus, associate professor of marine science and policy, was featured in several major outlets on the effectiveness of plastic bag bans.  Insects are dying: here are 25 easy and effective ways you can help protect them (The Guardian) – Douglas Tallamy, an entomologist, was featured in dozens of outlets for his expertise.    Political news coverage was front and center  U.S. Chamber of Commerce sues Trump administration over $100,000 H-1B visa fees (NPR) – Daniel Kinderman, a political science professor, was interviewed for his expertise on a lawsuit involving changes in work visas.  The government shutdown is over, but expect more fights and higher insurance prices to come (Delaware Public Media) – David Redlawsk, a political psychologist, discussed the recent government shutdown and what an end to it signals.  Wrestling Over Charlie Kirk’s Legacy and the Divide in America (The New York Times) – Dannagal Young, a communications professor, commented on how media reacted to the death of Charlie Kirk.  Consequences for colleges whose students carry mountains of debt? Republicans say yes (NPR) – Dominique Baker, associate professor of education, was quoted in multiple national outlets for her education expertise.   General expertise came in clutch  Why the U.S. struggles with passenger service despite having the most rail lines (NPR) – Allan Zarembski, a professor of railroad engineering, was featured in dozens of national publications for his expertise.  From folklore to your front porch: The history of the jack-o'-lantern (NPR) – Cindy Ott, an associate professor of history, detailed the history of this autumn staple in multiple outlets.   Nexstar Media Group buying Tegna in deal worth $6.2 billion (AP) – Danilo Yanich, professor of public policy, noted the ways the media giant duplicates work across networks.  Warren Buffett hired Todd Combs to take over Berkshire's portfolio one day. Here's what close watchers say about his surprise exit. (Business Insider) – Lawrence Cunningham, director of UD's Weinberg Center, was featured throughout the year for his business and economic expertise.  Enlighten Me: How to make your holidays truly happy (Delaware Public Media) – Amit Kumar, a professor of marketing, discussed strategies for finding happiness during the holidays throughout the winter season.  Students and their stories shined throughout the year Networking: Is it what you know or who you know? (The Chronicle of Higher Education) – UD's career-development office, which assists students on their job journeys, was featured.  U of Delaware Creates Yearlong Co-Ops for Business Students (Inside Higher Ed) – A new partnership with the state of Delaware connects business students to local employers, with the goal of reducing brain drain in the region was featured.  Wilmington’s 'STEM Queen' earns national Obama–Chesky honor (The News Journal/Delaware Online) – Jacqueline Means, a management information systems major, was featured for earning a national recognition. Vita Nova Restaurant Gives Culinary Students Hands-on Training (Delaware Today) – The student-staffed restaurant, Vita Nova, was featured.  Delaware professor transforms writing class by teaching students to use AI as the technology reshapes the workforce (WHYY) – Matt Kinservik, a professor of English, was featured for teaching students to use AI responsibly, exploring its capabilities and fact-checking tools. Pop culture experts weighed in 'Stranger Things' expert at UD chats about Netflix show's appeal (The News Journal/Delaware Online) – Siobhan Carroll, an associate English professor, sat down with a reporter to discuss the latest season and how the horror genre is often a mirror of our real world. “Horrendous And Insulting”: Backlash Erupts Over “Misrepresentation” In 2026 Wuthering Heights (Bored Panda) – Thomas Leitch, an English professor, said that “literal adaptations of classic novels are exceedingly rare, maybe impossible.” Major changes at UD highlighted University of Delaware appoints interim president to the permanent post (The Philadelphia Inquirer) – News of UD's new president, Laura A. Carlson, was covered throughout the region. Retiree learning center gets boost with $1M gift for downstate OLLI classes (Spotlight Delaware) – a large donation to the southern Delaware chapter of the Osher Lifelong Learning Institute, was featured. To speak with any of these experts in 2026 on these stories or others, please reach out to MediaRelations@udel.edu. Happy holidays and cheers for a bright and healthy new year! 

Holly MichaelAaron CarlisleCarlos MoffatJennifer TrivediSaleem AliWillett Kempton

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Biography

Holly Michael is the Unidel Fraser Russell Chair in the Environment and Professor in the Departments of Earth Sciences and Civil and Environmental Engineering at the University of Delaware. She is also Director of the Delaware Environmental Institute. She holds a BS in Civil Engineering from the University of Notre Dame and a PhD in Hydrology from the Massachusetts Institute of Technology. She is an Associate Editor of Water Resources Research and served as the Geological Society of America James B. Thompson, Jr. International Distinguished Lecturer. Her research interests include saltwater intrusion, water resource management, contaminant hydrology, coastal hydrogeology, groundwater-surface water interactions, and geostatistics. Some of her current projects include investigating the coastal critical zone, measuring groundwater flow into estuaries, modeling groundwater salinization due to climate change, evaluating sustainability of arsenic-safe groundwater in Bangladesh, and application of experimental economics to groundwater resources.

Areas of Expertise

Water Supply Sustainability
Groundwater Salizination
Water Resource Management
Climate Change Adaptation
Coastal Groundwater Dynamics

Media Appearances

Drinking Water Map Shows States With Most Contaminants

Newsweek  online

2025-10-13

The reasons California, Texas and New York all have higher numbers of contaminants in their water is largely due to their higher populations and "substantial industry, including a lot of petroleum activity," Holly Michael, director of the Delaware Environmental Institute and professor of Earth Sciences and Civil, Construction and Environmental Engineering at the University of Delaware, told Newsweek.

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Scientists went hunting for freshwater deep beneath the Atlantic Ocean. What they found could have global implications

CNN  online

2025-09-17

“We think that the freshwater got there thousands of years ago, when sea level was much lower and the continental shelf was exposed on land,” said Holly Michael, a professor of Earth sciences and civil and environmental engineering at the University of Delaware, who was part of the expedition.

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What Giant ‘Secret Fresh Water’ Deposits Off US Coast Mean for Drinking Water

Newsweek  online

2025-09-13

Fresh water can exist beneath the seabed because the geologic formations we tap for water supply on land don't just stop at the shoreline, said Holly Michael, professor and director of UD's Delaware Environmental Institute.

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Articles

Invisible groundwater threats to coastal urban infrastructure

Nature

2025-08-06

Groundwater-associated hazards in coastal cities can be as acute as surface flood hazards, but are often overlooked, more persistent, and harder to identify. Here we discuss how climate change is causing flooding and corrosion of coastal infrastructure by driving groundwater rise and salinization.

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Terrestrial groundwater drives coastal ecosystem shifts

Geophysical Research Letters

2025-07-17

Rising sea levels and stronger storms are driving saltwater intrusion along global coastlines, forcing marshes inland and replacing forests and farmland across the Delmarva Peninsula. While sea level rise and storms have long been blamed, our research shows that changes in terrestrial groundwater levels play a larger role in pushing saltwater into freshwater systems. We also found that heavy rainfall during storms can help flush saltwater out, allowing groundwater to recover—revealing that land-based hydrology is a key driver of coastal ecosystem change in this region.

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The impacts of climate change on coastal groundwater

Nature Reviews Earth & Environment

2025-01-11

Coastal groundwater (CGW) is a critical water resource for many communities and can be a key part of coastal ecosystems. Owing to its location, CGW faces both terrestrial and marine effects of climate change while simultaneously being impacted by anthropogenic activities.

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Accomplishments

Geological Society of America James B. Thompson, Jr. International's Distinguished Lectureship

2018

NSF Faculty Early Career Development Award

2012

Oak Ridge Associated Universities Ralph E. Powe Junior Faculty Award

2010

Education

Massachusetts Institute of Technology

Ph.D.

Hydrology

2005

University of Notre Dame

B.S.

Civil Engineering

1998

Affiliations

  • American Geophysical Union
  • Geological Society of America
  • International Association of Hydrogeologists
  • International Association of Mathematical Geosciences