Ever more of the world's population is living with water insecurity and is unable to consistently access safe, clean drinking water.

A number of factors, including climate change and poor water management, are worsening water scarcity, which coupled with other social problems like rising inequality and ethnic tensions, are threatening conflict between states and within states.

Read more: Water scarcity in Pakistan – A bigger threat than terrorism

Charles Iceland, director of global and national water initiatives at the World Resources Institute, spoke to DW about disputes over the essential resource and how they can be avoided, as well as the new Water, Peace and Security (WPS) tool that forecasts where water disputes are likely over the next 12 months, and how they might be avoided.

Charles Iceland from the World Resources Institute says water scarcity alone rarely causes violence, but is a 'threat multiplier'

DW: What is a water conflict and what does it look like?

Charles Iceland: In many places throughout the world, there's just more and more demand for water with respect to what's available. Sometimes the conflicts are nonviolent — like in Australia or California where people go through the legal system or they work their issues out without violence. But in a lot of places, the problem is grave enough and the ability to resolve the problem is not well developed. So you can see the wrestling over these scarce resources develop in violent ways.

Read more: India's ghost villages: Food and water scarcity forcing many to leave

Where would you say are the regions and countries in which water, water scarcity, water quality are playing a role in conflict?

Populations are growing very quickly in sub-Saharan Africa — going up fourfold between 1960 and today. Resources have either stayed the same or you have a reduction in resources, because of climate change or because desertification is reducing arable land. So you have a lot of violent conflicts between these smallholder farmers and pastoralists wrestling over scarce land and water resources. We've seen over the past couple of years pastoralists massacring farming communities and retribution by farming communities.

In countries like Australia, disputes over water do occur, but they rarely become violent and are resolved by legal mechanisms

We're also seeing a lot of violent conflict play out in the Middle East. So, for example, in Iraq, a lot of the demonstrations that led to the prime minister's resignation a few months ago. But part of the grievances entailed lack of services, which included lack of access to clean water and lack of access to electricity. They're getting sick. About a year and a half ago, 120,000 people in Basra had to be hospitalized because they were drinking contaminated water.

And it's [water scarcity] is also a problem in places like Iran, Afghanistan and India. So those are some of the hotspots.

Read more: How residents of one of Nairobi's poorest districts are cleaning up a major local river

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So it could be an interstate conflict, but it could be intrastate as well between various stakeholders in society?

When you have violent conflict, it usually plays out at a subnational level. While you have international conflicts over water, those are rarely resolved through violence. So, for example, we have India and Pakistan wrestling over water in the Indus. We have Iraq and Turkey wrestling over water in the Tigris and Euphrates. We have Egypt and Ethiopia wrestling over water and in the Blue Nile Basin. The parties try as much as they can to resolve the issues in a nonviolent way through diplomacy.

Mass protests broke out in the southern oil-rich province of Basra, Iraq, in 2018 and 2019, with people demanding better public services, including access to water

Poor infrastructure and water management, decreasing rainfall and growing populations are among the factors that can lead to conflicts over water

Read more: Egypt, Ethiopia, and Sudan commit to resolving Nile dam dispute

Will we see a future of water wars and water as the new oil?

Both, like a lot of metaphors, are not really accurate. Wars are rarely fought over water as a single issue. Rather, we see the problem as a threat multiplier. So it's one issue in the background. If you have other issues leading to instability, maybe problems between ethnic groups or anything could trigger violence, the background of having water scarcity, has destabilized the society and made it less able to resolve problems amicably.

How much of a role does climate change play in water scarcity or water quality?

We have trouble attributing any particular drought or flood to climate change, but we are seeing very dramatic increases in the incidence and severity of drought in parts of sub-Saharan Africa and the Middle East. So we're having a general decline in rainfall in some of these areas. In some of these areas the amount of rainfall stays the same but you have very large intermittent drought and flood periods. That's what's been predicted by climate change experts.

A herder in Iraq brings his buffalo to drink at an empty riverbed. The country has seen protests erupt, partly over a lack of resources, including water

What other factors can lead to water scarcity?

The management of water resources is a critical factor. So people, in theory might have enough water in some places, but they're mismanaging it. They're losing water. They are polluting the water. And then there are upstream, downstream issues. There are many instances where the upstream users are accessing water, but downstream users suffer because they're getting less water.

Read more: In the Balkans, locals fight to save their wild flowing rivers from hydropower

What exactly is the Water Peace and Security tool?

We're a consortium of nine organizations in the United States and Europe that are working together to both try to identify hotspots of water insecurity and then try to help local people and the global community do something about this to either avoid conflict or minimize the impacts of conflict. So we've developed a machine learning based model that tries to predict where conflict might break out in the next 12 months. We're using a number of factors — political, economic, social, demographic — that might point at imminent conflict. And to that group of indicators, we add water and food insecurity indicators. We try to identify these hotspots, whether they are water related conflicts and what are the drivers of the conflict.

The construction of the Grand Ethiopian Renaissance Dam is causing tensions in the Nile Basin between Egypt, Ethiopia and Sudan

How can you resolve a water conflict?

There are lots of examples on the subnational and international levels where either global or national entities have brought competing [water] users together.

Read more: Water wars: Are India and Pakistan heading for climate change-induced conflict?

A very good example of this was in 1960, the World Bank brought the governments of India and Pakistan together to develop a treaty that divided up the water in the Indus River Basin. That treaty has come under pressure recently but it's still been able to keep India and Pakistan from having problems boil over — at least to date.

Jennifer Collins conducted the interview, which has been shortened and edited for clarity.