Water scarcity threatens the health and development of communities around the globe. Climate change is intensifying the problem, pushing governments to find more innovative, collaborative ways to address water stress.
Introduction
Billions of people around the world lack adequate access to one of the essential elements of life: clean water. Although governments and aid groups have helped many living in water-stressed regions gain access in recent years, the problem is projected to get worse due to global warming and population growth.
Water stress can differ dramatically from one place to another, in some cases causing wide-reaching damage, including to public health, economic development, and global trade. It can also drive mass migrations and spark conflict. Now, pressure is mounting on countries to implement more sustainable and innovative practices and to improve international cooperation on water management.
What is water stress?
Water stress or scarcity occurs when demand for safe, usable water in a given area exceeds the supply. On the demand side, the vast majority—roughly 70 percent—of the world’s freshwater is used for agriculture, while the rest is divided between industrial (19 percent) and domestic uses (11 percent), including for drinking. On the supply side, sources include surface waters, such as rivers, lakes, and reservoirs, as well as groundwater, accessed through aquifers.
But scientists have different ways of defining and measuring water stress, taking into account a variety of factors including seasonal changes, water quality, and accessibility. Meanwhile, measurements of water stress can be imprecise, particularly in the case of groundwater. “Any numbers out there have to be taken with a grain of salt,” says Upmanu Lall, a Columbia University professor and water expert. “None of these definitions are typically accounting for groundwater usage, or groundwater stock.”
How has water factored into international relations?
Many freshwater sources transcend international borders, and, for the most part, national governments have been able to manage these resources cooperatively. Roughly three hundred international water agreements have been signed since 1948. Finland and Russia, for example, have long cooperated on water-management challenges, including floods, fisheries, and pollution. Water-sharing agreements have even persisted through cross-border conflicts about other issues, as has been the case with South Asia’s Indus River and the Jordan River in the Middle East.
However, there are a handful of hot spots where transboundary waters are a source of tension, either because there is no agreement in place or an existing water regime is disputed. One of these is the Nile Basin, where the White and Blue Nile Rivers flow from lakes in East Africa northward to the Mediterranean Sea. Egypt claims the rights to most of the Nile’s water based on several treaties, the first dating back to the colonial era; but other riparian states say they are not bound to the accords because they were never party to them. The dispute has flared in recent years after Ethiopia began construction of a massive hydroelectric dam that Egypt says drastically cuts its share of water.
Transboundary water disputes can also fuel intrastate conflict; some observers note this has increased in recent years, particularly in the hot spots where there are fears of cross-border conflict. For example, a new hydropower project could benefit elites but do little to improve the well-being of the communities who rely on those resources.
Moreover, water stress can affect global flows of goods and people. For instance, wildfires and drought in 2010 wiped out Russian crops, which resulted in a spike in commodities prices and food riots in Egypt and Tunisia at the start of the Arab uprisings. Climate stress is also pushing some to migrate across borders. The United Nations predicts that without interventions in climate change, water scarcity in arid and semi-arid regions will displace hundreds of millions of people by 2030.
What are international organizations and governments doing to alleviate water stress?
There has been some international mobilization around water security. Ensuring the availability and sustainable management of water and sanitation for all is one of the UN Sustainable Development Goals (SDGs), a sweeping fifteen-year development agenda adopted by member states in 2015. Smart water management is also vital to many of the other SDGs, such as eliminating hunger and ensuring good health and well-being. And while the Paris Agreement on climate does not refer to water explicitly, the United Nations calls [PDF] water management an “essential component of nearly all the mitigation and adaptation strategies.” The organization warns of the increasing vulnerability of conventional water infrastructure, and points to many climate-focused alternatives, such as coastal reservoirs and solar-powered water systems.
Governments and partner organizations have made progress in increasing access to water services: Between 2000 and 2017, the number of people using safely managed drinking water and safely managed sanitation services rose by 10 percent and 17 percent, respectively. In 2022, the Joe Biden administration announced an action plan to elevate global water security as a critical component of its efforts to achieve U.S. foreign policy objectives. But the pace of climate change and the COVID-19 pandemic have presented new challenges. Now, many countries say they are unlikely to implement integrated water management systems by 2030, the target date for fulfilling the SDGs.
Still, some governments are taking ambitious and creative steps to improve their water security that could serve as models for others:
Green infrastructure. Peruvian law mandates that water utilities reinvest a portion of their profits into green infrastructure (the use of plant, soil, and other natural systems to manage stormwater), and Canada and the United States have provided tens of millions of dollars in recent years to support Peru’s efforts [PDF]. Vietnam has taken similar steps to integrate natural and more traditional built water infrastructure.
Wastewater recycling. More and more cities around the globe are recycling sewage water into drinking water, something Namibia’s desert capital has been doing for decades. Facilities in countries including China and the United States turn byproducts from wastewater treatment into fertilizer.
Smarter agriculture. Innovations in areas such as artificial intelligence and genome editing are also driving progress. China has become a world leader in bioengineering crops to make them more productive and resilient.
