The UK has seen drought conditions since 2018, but the flooding of June 2019 shouldn't come as a surprise.
Thousands of hydropower dams are under construction around the world. New research shows that by cutting off sediment flow, these dams can have big ecological effects on far-off bays and deltas.
Satellites hundreds of miles overheard are helping scientists to predict drought, track floods and see how climate change is changing access to water resources.
A new report predicts that one-third of the ice in the Himalayas will melt, even if we contain global warming to 1.5C. So what does that mean for the flood-prone valleys below?
Freshwater fish are suffering as drought becomes more common and severe. Whether they survive will depend on how governments manage rivers and lakes, and on taking action against climate change.
Maps can show "the big picture" to lots and lots of people in an engaging and colourful way.
Migrants are no more at risk of drowning than Australian-born swimmers but you'd never know from media reports.
Marshes, swamps and other kinds of wetlands provide valuable services, such as effective natural flood control. But they are being destroyed for development in many parts of the world.
The Trump administration wants to end federal protection under the Clean Water Act for many small streams and wetlands. But as a geoscientist explains, these are critical parts of large river systems.
Populations of freshwater species are in a state of deep decline. But we know why and we can reverse the trend.
A decade of bipartisan research has provided plenty of answers to the problems plaguing the Darling River.
Mass fish deaths are a blaring warning sign for the heath of the Murray Darling Basin, but just as worrying is the sight of dry areas in the Darling.
Public confidence in the institutions in charge of the Murray Darling Basin has plummeted – with good reason.
Algae blooms have killed hundreds of thousands of fish in the last two weeks, but what exactly are they and how do we get them under control?
When parents walk in the forest with their children and us and see how children are drawn to spiral snails, together we see how connections with the land are critical for the Earth's future.
Pharmaceuticals were found in every invertebrate sampled from six Melbourne streams - including a waterway in a national park.
When people form local networks to take care of resources such as drinking water, they strengthen their communities. Technology can support these efforts and promote learning and innovation.
Hurricanes frequently move inland in the southeast US, causing widespread river flooding, but emergency plans focus on protecting people in coastal communities.
Today, many Australian urbanites see rivers as little more than picturesque places for a paddle. But in the colonial era, rivers served as highways, drinking sources, sewers, and routes to discovery.
Widespread flooding in North Carolina from Hurricane Florence shows the need for better advance planning in inland areas of the south and mid-Atlantic, especially near rivers.