A fisherman at work in the White Nile. Half the river’s flow is lost to evaporation from the Sudd swamps, a large wetland.
Arne Hoel/World Bank/Flickr
Nature based approaches to solving water problems originated in Europe and don't take into account Africa's huge infrastructure deficit.
Flooding is a common hazard in Nezahualcoyotl, a Mexican city just outside the nation’s capital.
AP Photos/Eduardo Verdugo
In many Mexican cities, water is treated as a political bargaining chip – a favor that public officials can trade for votes, bribes or power.
A woman carries a water canister in a village near Loiyangalani, Kenya.
New ways of managing water have emerged in some of Africa's urban and peri-urban areas.
Deep dive: water flows from a bore in Birdsville, Queensland.
Groundwater is out of sight, but it shouldn't be out of mind. As cities struggle to cope with drought, we should remember that our largest stocks of water are hidden deep underground.
The Melbourne skyline. Water saving habits adopted during a prolonged drought that ended in 2009 are still followed.
The experiences of other countries can provide valuable lessons for Cape Town on how to better cope with its water crisis.
Presidents Issoufou, Yayi, Deby and Buhari at a meeting of the Lake Chad Basin Commission, the body in charge of the lake replenishment project
The transnational project conceived 30 years ago to replenish the drying waters of Lake Chad finally seems poised to take off. But first, internal politics within member states must be overcome.
The Sino-Singapore Tianjin Eco-city in Tianjin Binhai New Area, China.
EPA/HOW HWEE YOUNG
Engineering solutions are popular interventions, but cities cannot simply pipe away flood risk. Chinese sponge cities offer a way forward.
Irrigation pumps along the Barwon River in New South Wales.
AAP Image/Dean Lewins
The system that allocates water use in Australia's largest river basin relies on a shared commitment by states to uphold the rules. New allegations of water theft threaten to break that trust.
Ratanpura Lake, on the outskirts of Ahmedabad, Gujarat, has almost completely dried up.
Hit by weak monsoons, India faces unprecedented water shortages.
New water policies could cause even more harm to the already damaged Tukituki River.
Phillip Capper/Wikimedia Commons
New Zealand’s economically driven approach to ecological decline risks entrenching environmental problems rather than solving them.
South Africa will deal with future water constraints by importing basic foodstuffs from its neighbours.
Urbanisation will require massive amounts of water to sustain the livelihoods of millions expected to move into cities. This may happen at farmers' expense.
Blue-green algae in the Murray River upstream of Mildura in April.
Toxic algal blooms were unheard of in Australia's major waterways before 1991. Now the Murray River has been struck by four major events in less than a decade, with more likely in the future.
The EVA Lanxmeer development in the Netherlands provides a model for how to incorporate green infrastructure in all aspects of the planning process.
Green infrastructure can be delivered relatively easily using existing planning processes. The main obstacle could be psychological: planners are wary of disruption to embedded practices.
There are still concerns over the impact of upstream coalmines on water in the Warragamba Dam, a key part of Sydney’s water network.
AAP Image/Dean Lewins
The cutting of senior staff from WaterNSW, the body that oversees the safety of Sydney's water supply, poses serious risks to Australia's most complex water network.
Photosynthesis is crucial to the ability of plants to convert sunlight into energy.
N i c o l a/Flickr
Distinguished Professor Graham Farquhar has received this year's Prime Minister's Prize for Science for his pioneering research into photosynthesis.
Go with the flow: scarce water has allowed Outback species to persist for millennia, where otherwise they might have died out.
The Outback covers 70% of Australia, and its water is precious and scarce. Yet there is no joined-up plan to monitor and manage Outback water, despite the wealth of species and communities that depend on it.
Southern Africa has rivers, like the Zambezi, that run through a number of countries. How best to manage this is the challenge.
Southern African countries do not face water scarcity and do not need to build joint water projects. But they do need talk to each other to avoid misunderstandings.
Water makes all the difference for agricultural crops.
US Geological Survey
The majority of water that people use goes to agriculture. In a drier, hungrier future, we'll need to use what water we have with less waste. Technologies being developed now will help.
Unless water is governed properly, the African continent will face massive problems in the coming years.
Managing Africa's water sources is a matter of vital importance for people to have any hope of surviving on the continent
Shifting water around helped Rome’s rise – and fall.
As all good Monty Python fans know, water technologies feature large in the legacy of benefits left by Roman civilisation. But while aqueducts, sewers and baths retain an obvious presence in the landscape…