Sustainable solutions require data, expertise, and local experience together
In one of the world's most water-scarce regions, rain has long been both a rarity and a threat — arriving not as relief but as catastrophe. A German-Jordanian research team, working across three years in Jordan and the broader MENA region, has offered a framework for holding both truths at once: that the same violent rainfall which kills can also be captured, managed, and made to serve communities chronically short of water. Their work suggests that resilience does not require wealth, only the wisdom to weave together data, nature, and the knowledge of people who live closest to the risk.
- More than 300 flash floods have struck the MENA region since 1950, and climate change is accelerating their frequency and ferocity in places that are already desperately short of water.
- The deepest vulnerability is informational — without reliable records of rainfall, soil absorption, and where people actually live near flood zones, governments cannot warn, plan, or protect.
- Researchers built an integrated risk model for Jordan that stitches together satellite imagery, open-source mapping tools, and direct community testimony to compensate for the data gaps that poorer institutions cannot afford to fill.
- Simulations in Amman demonstrated that blue-green infrastructure — wetlands, permeable pavements, retention ponds — could meaningfully reduce the surge of water through the capital during extreme storms.
- The team's policy brief insists that lasting flood resilience depends not on technical fixes alone, but on bringing municipal governments, planners, and affected residents into the design process from the very beginning.
Jordan is eighty percent desert, its groundwater depleted, its people chronically thirsty. Yet when rain arrives in the Middle East and North Africa, it often arrives as violence — more than three hundred flash floods since 1950, and climate change promising more. The cruelest irony of the arid world is that water, when it finally comes, kills.
The Institute for Social-Ecological Research in Germany, working with Jordanian institutions through a project called CapTain Rain, spent three years asking a practical question: how do you protect people from floods while also capturing that rare rainfall for use? What they found was not a single solution but a framework — one built for countries that cannot afford expensive infrastructure or specialized expertise.
The central obstacle is data. Most MENA nations lack reliable records of rainfall patterns, soil conditions, and where vulnerable populations actually live in relation to flood zones. Without that foundation, early warning systems cannot be built and planning cannot begin. The researchers responded by combining whatever hydrological records exist with freely available satellite imagery, crowdsourced maps like OpenStreetMap, and — crucially — the direct testimony of communities who know their own terrain. An integrated risk model developed for Jordan showed that this patchwork of sources could still produce actionable assessments, even where institutional capacity is thin.
Simulation work in Amman pointed toward blue-green infrastructure — wetlands, permeable pavements, retention ponds, green roofs — as tools capable of substantially reducing flood surge through the capital. But the team was equally insistent on a less technical point: flood management fails when it is designed without the people it is meant to protect. Participatory planning surfaces what no dataset can — where water pools in unmarked hollows, which neighborhoods hold residents who cannot evacuate, which informal settlements official maps have never recorded.
The policy brief the team has released asks little that money cannot substitute for: invest in data even through open-source means, coordinate across government and community, protect remaining green spaces as urbanization accelerates, and listen to people on the ground from the start rather than as an afterthought. Jordan's experience suggests that climate resilience in arid regions is achievable not through wealth, but through the willingness to combine what is already there.
Jordan is mostly desert. About eighty percent of the country is sand and rock, with groundwater reserves too depleted to reliably supply its people or its farms. When rain comes to the Middle East and North Africa—the MENA region—it often comes violently. Since 1950, more than three hundred flash floods have swept across the region, killing many. Climate change is making these storms more frequent and more severe, layering new water crises onto old ones: too much water falling too fast, in places that are chronically thirsty.
A German-Jordanian research team spent three years asking a practical question: How do you protect people from floods while also capturing and using that rare rainfall? The Institute for Social-Ecological Research, or ISOE, led the effort through a project called CapTain Rain, working with Jordanian institutions, government agencies, and local authorities. What they found was not a single technical fix, but a framework—one that depends on weaving together data, people, and nature in ways that even resource-poor countries can manage.
The core problem is information. Most MENA nations lack reliable records of rainfall patterns, water flow rates, soil conditions, and where people actually live in relation to flood zones. Without that data, you cannot build early warning systems. You cannot predict which neighborhoods will flood. You cannot plan where to build barriers or where to let water spread safely. Katja Brinkmann, the project manager, explains the insight plainly: understanding risk requires linking better data management, careful planning, and genuine participation from the people affected. The researchers recommend pulling together whatever hydrological and meteorological records exist, filling gaps with freely available satellite imagery and crowdsourced maps like OpenStreetMap, and then asking communities directly what they know about water, flooding, and their own vulnerability.
The team developed an integrated risk assessment model for Jordan that combines technical measurements—water levels, flow speeds—with information about how exposed different populations are and what the land itself can absorb. The model works even where institutional capacity is thin, because it relies on open-source tools and local knowledge rather than expensive infrastructure or specialized expertise. Simulation work in Amman, Jordan's capital, showed that so-called blue-green infrastructure—wetlands, permeable pavements, retention ponds, green roofs—could substantially reduce the volume of water surging through the city during heavy storms.
But data and nature-based solutions alone are not enough. Brinkmann emphasizes that sustainable flood management requires bringing municipal governments, planning authorities, and local stakeholders into the process from the beginning. When people who live in flood-prone areas help design the measures meant to protect them, those measures are more likely to be built, maintained, and actually used. Participatory planning also surfaces local knowledge that no dataset can capture—where water pools, which neighborhoods have elderly residents who cannot evacuate quickly, which areas have informal settlements that official maps miss.
The ISOE team has distilled their findings into a policy brief aimed at decision-makers across the MENA region. The recommendations are clear: invest in data collection and management, even if it means relying on open-source and participatory methods. Strengthen coordination between government agencies and communities. Protect remaining green spaces and wetlands as the region urbanizes, because those spaces are flood buffers and water filters. Involve affected populations in planning and implementation, not as an afterthought but from the start.
What makes this work transferable is that it does not assume wealth or institutional maturity. Jordan's experience shows that countries with limited budgets and fragmented data systems can still build climate resilience by combining what they have—satellite imagery, community knowledge, open-source tools, and the willingness to listen to people on the ground. As climate change intensifies the extremes in arid regions, that combination may be the only realistic path forward.
Notable Quotes
Technical measures alone are not enough for climate-resilient flash flood management. We need integrated concepts that bring together ecological, social and spatial aspects as well as the knowledge of local actors.— Katja Brinkmann, ISOE project manager
Sustainable solutions can only be developed by bringing together data, expertise and local experience.— Katja Brinkmann
The Hearth Conversation Another angle on the story
Why does Jordan flood so badly if it's mostly desert?
Because when rain does fall in arid regions, it falls hard and fast on ground that cannot absorb it. The soil is baked, there are few wetlands or vegetation to slow the water down, and it all rushes downhill at once. You get flash floods instead of steady soaking.
So the problem is not that there's too much rain overall, but that it comes all at once?
Exactly. Jordan is water-starved most of the time. But when a storm hits, the same landscape that cannot hold water suddenly has too much of it, all moving at dangerous speed. That's the paradox the research team was trying to solve.
How do you build an early warning system when you don't have good data?
You layer what you have. Satellite imagery shows you terrain and where people live. Open-source maps like OpenStreetMap fill in infrastructure. Then you ask the people who live there what they've seen—where does water pool, where does it move fastest, which areas flood first. That local knowledge is data too.
And the blue-green infrastructure—what's that actually doing?
It's slowing water down and letting it soak in instead of rushing away. Wetlands, rain gardens, permeable pavements, retention ponds. In a dense city like Amman, these spaces act like sponges. They reduce the volume of water that has to move through streets and neighborhoods.
But if you build all that, won't people resist it? It takes up space.
That's why participation matters from the start. If the people who live there help design it, they understand why it's there. They see the benefit. And if local authorities are involved in planning, they're more likely to actually maintain it over time.
Can this approach work in other countries in the region?
That's the whole point of the research. The conditions are similar across MENA—water scarcity, arid terrain, climate change intensifying extremes, limited institutional resources. The framework is designed to be adaptable, not dependent on having lots of money or perfect data.