a house that works like a sudden the facade stores rain water and then use it in a variety of ways. how does it work? and how can this technology be used in cities hit by climate change? stuttgart has a prototype tomorrow today. next, on dw, the last year it was a year of extreme weather, extreme storms in libya, extreme range. for example, in brazil, the and extreme heat in greece. scientists say that climate change is going to make it stream, weather events more frequent. how can we prepare our cities and rural areas for

this new future? stay tuned for all this and more coming up on dw science show. welcome to tomorrow . today the su sling hot heat waves are becoming an increasing problem in urban areas around the world. rising temperatures and humidity can also lead to torrential rains with stormwater that can overwhelm urban drainage systems. but architect christina ice and bond has come up with a solution here on the 10th floor of an adaptive high rise built by the university of stuttgart and south western germany. she's been testing her idea under real life conditions. so our approach involves creating surfaces and building decides that can absorb rainbow or name which can then be used in the

building and later on during a hot spell that water can be used for evaporative sustainable cooling a hybrid. her solution involves special tech styles called hydro skin elements that are attached directly to the facade. inside the high rise, there are special tanks that store collected rainwater. on hot dry days, this water is returned from the tanks to the facade element. the windows are covered with 2 lightweight textile skins which are separated by a porous space or fabric that allows the air between the 2 layers. to circulate the water can evaporate, helping to cool the buildings interior and improve the microclimate outside. the building looked into this metals before. um if we discovered that if we were to equip this entire building with hydro skin and also we could cool down

a specific volume of air by 10 degrees celsius in cartersville, paved surfaces and the lack of trees and vegetation are also heating up our cities . and turning city roads into rivers after a heavy rainfall. the hydro skin facade elements can make a difference here to, in a downpour. they remove some of the excess rainwater and funnel it to the tanks. the rainwater is 1st collected by a file on the inside of the element, which then drains the water down into a profile system. that water can then be put to various uses for flushing toilets, for example, or to cool the building. and test show that the system works. and we installed more than 50 sensors in our test stations, plus one weather station on the facade, and one on the roof sato. the sensors measure how much the facade is cooled during

hot weather. and how much water can be absorbed when it rains? test station 2 shows. there were 640 grams of water in the back system. after about half an hour of rain, there is 974 grams of water. in principle, the textile can absorb an unlimited amount of water. what matters is the profile system. in the profile system, the water pipes and metal frames determines how much water can be captured in a downpour. this year shows how we refine the technology item. this profile system is large enough so that it could handle a once in a century rainfall event, but still slender enough that it wouldn't interfere with the architect tonic anesthetic aspects of the facade. pushing upon in many cities around the world, sewage systems can no longer handle the run off from frequent storms. so rainwater

retention setups will become ever more important. christina, ice and bonds, hydra skin system, is made of synthetic fibers that are almost completely recyclable. and instead of bouncing off the text style structure, the raindrops are almost entirely absorbed, making for a very efficient harvesting system. the architect drew some of her inspiration from tex, towns used in other industries. the event they're also used in the automotive industry and car seats, for example. why is that? because people don't want to sweat on long drives and they want their sweat to evaporate quickly. so the material encourages air circulation. that's also useful for our work, since it helps the water evaporates and enhances the cooling effect for stack architects have long been familiar with the principal of evaporative cooling. the new high tech hydro skin fabric is an extension of that principle. and it's so

lightweight that it can be retrofitted on most any building that i should take. as an architect, i can imagine all sorts of design possibilities, beginning with different colors, patterns, logos, and images, or even incorporating movable elements onto the facade which could be pushed back and forth, folded in and out, or even flipped back and forth. and the possibilities are almost unlimited. water can make urban heat. pilots more bearable, much like a fountain can cool us on a hot day. eclip with evaporative facades, entire buildings could create sustainable cooling micro climates. and that might happen much sooner than we think. the hydro skin fabric has already been patented in a down for when $15.00 to $25.00 leaders of rain per square meter fall in just a single hour flooding can be a real problem. the simulation for this, we just city of golf and birds shows what can happen. one problem is that most

urban spaces nowadays have been paved over. the rain can be absorbed, leading to flooding. due to climate change programs to weather proof, our cities are growing increasingly important. hamburg and northern germany is leading the way climate change is bringing heavier rains and increased flooding to many areas. come back, gemini is no exception. that's why i chose to just, andre is cool. and becca wants to help with it and watch it pretty much the city dependents worship some vendor. we can only protect ourselves if we know how big the button will be in the future. let me and if we don't carry out measurements, what we can do is guess of after the scientists to set up the t y, the stations that send him data from every corner of the city. these precipitation gauges show how much rain has fallen in each area. and one of them i know for this is basically a target that collects the precipitation the new york block ultimate and then it weighs it using a very precise scale mist. yeah,

we can see in real time how much rain is full and then this location they stay to refuse to calculate what might happen in the future to mrs. shown investor good at c, and then we need to understand what would happen if we had a downfall with an intensity of 8 or an intensity of tense. missed the name of ok. it's better if we don't wait until we actually have that kind of rainfall event. the more than the said feet are models with our data and use the models to predicts what happens again, go to those origin shockey. this kind of weather data will help them and this up a water authority plan for the future. andrea is cool and becca and his colleague andre aspire are using new simulation software to generate a model. so handbook. they can now generate predictions that every address and location in the city using the

simulation software that testing various solutions. could a trench in this city park helped i'm good. accept raymore to me. it's just, i wouldn't make it too big. i don't think it's necessary is let's start with 10 centimeters. okay. okay. okay, sounds good. on the other side of the street, a retaining wall could protect the houses. they sketch it in and the software calculates where the retaining wall and the trench would die. the, the will to canada, to check it, raising it, made a difference. so let's get busted, right? yes. okay. the water only reaches the curb and everything else flows towards the park just the way we want it to know. nice position in the park. the ground will so cut the will to one example of how, how big is being turned into a sponge. city areas where water can save into the ground, green rooftops,

water permeable surfacing and rainwater tanks. a real part of the package rainwater will be put to good use right on the spot sustaining constituting heat waves and allowing for evaporative cooling, making 100 more climate resilient, 10 victim dish, dr. turning the city into a sponge, city would be beneficial in 2 ways. so 1st we'd be reducing the button, it's heavy rainfall and we'd be reducing the burden of long dry spells. it seemed that even last one, but on top, so we'd have a win win situation. a big one. also protecting our drainage and drinking water supply systems between us as long as the steam. the cities schools are also getting in on the act. this school yard is being re pumped in accordance with cooling back as simulations, environmental engineer of and politic center is in charge. it's another layer and the transformation of 100 into a sponge city. a city tilted with areas that could absorb water by not almost all

the rooms drain into retention basins. that has several advantages, but it's good for the natural water balance and helps replenish the ground water plus the evaporation from the base and cups cool down the city and crude and effects. for the stop sema garcia here you go to the top of the in bank and i don't know the top right under. yep. of the most popular tide. yeah. phone doesn't were 9 meters 90. want me to an organization. okay. all right, let's see me. that's fine. j as cool. who becca enters the new base and into his model on one. hm. so it's amazing how much it based on like this kind of income. does this price is a nice to the bottom on how we come up with an idea of in say, it reminded me to do all sorts of measurements and simulations one month. and we want to become a reality here in the school we often is you have to do it. and it says next,

it's one of the great parts of our work. and it's huge. you moved you 19 year old son and all a number of other areas in the school year out of those. they've been turned into sponge. it's like here behind the school, the large areas of asphalt, were removed here and replace it with the water permeable surface. these that allows the rainwater to seat them to the ground. water has hands in school or you can see the water 1st. it starts to flow, but pretty soon it gets absorbed and then flows down into the ground water. the rain helps keep the soil here moist rather than just ending up in the cities sewage system. since we should be fine, what's important is that we get started getting that we start trying things. i'm gaining experience bit by bit and smell and morgan at a later generations. we'll learn from our experiences and maybe improve on it device to best off. and as we have someone has to take the 1st step and what time i begin by working with walter robinson against it. and i guess implementing nature

of a solutions for a sustainable feature with minds about science bounced technology. that's why dw signs is now on take time. what do why do gravitational ways that that is when did people begin getting high and laughing gas out the drums boogie to the beads. and what's the perfect kid football find? find the on says gets most dw science own new tick tock channel. what is read? why are they if you have a special science question, send it to us as a video, text or voice mail. if we answer it on the show, we'll send you a little present as it thank you. come on. just ask

this week's view or question comes from p g in south africa. is there a difference between clouts and folks? physically speaking? no, because folk is nothing more than a towel to the ground based consist of tiny was adopted. slicing in the these dropped fits of foam twin wolf to a desperate storm lakes, rivers or oceans. the world today the closest it rises and condenses. the main difference between salt and clouds is how high they are. if it's cold enough, near the ground, for roots of 8 to condense that forms of visible max. this happens most angleton and winter. as soon as the massive glued to bankrupt structure ability to see

beyond the kilometer away, we quit smoke. all of the visible accumulations of water vapor includes clouts, scientists differentiate between a total of 10 types according to the around to toot. high level clout, also known as cirrus clouds, farmington altitude of 5 to 13 columbus because as it's very cold, the, the made up entirely of ice middle clouds phone between 2 and 7 kilometers above the ground. they include a type of cloud, noticed ulta, cumulus, low level, klaus, a cub, a low, a heights of 2 kilometers. so i'm like the straight to scout a so close to the ground that they're roughly referred to as high folks. the best cool cloud 6 done day for several layers, like for example, the cumulus cloud, which also looks like

a cauliflower at the top. the molten holes of the surface is typically covered by clouds. advice clouds and folks planning to, to roll and meet to urology. they regulate the schools to balance and have a big impacts on the climate. busy the clouds fog and miss direct kind of atmospheric water vapor in places that are especially parched into air. it harvesting water from the clouds could make all the difference that includes regions like the middle east and north africa and particularly places where the clouds are practically close. enough to touch the early morning clouds gathering and the mountains of ground come out here. the strange structures will capture them on

the stone or leave uh, as an environmental technician with the life. and you have a lot of projects. yeah. he's showing a trainee. the principal, based on nature's model, how is he going to link it? but it has like an extra moisture from their low man. i'm afraid he got locked up, they sucked it up. it's like a small issue. the foreman view unusual instructions take advantage of a common phenomenon on the north side of spain's canary islands. crowns move in from the atlantic stall on the mountain sides, the sean, or leave under his colleagues of setup for collect as cloud catches fell on monday . they sunk a valuable both of in the same way that like i'm to do a name on my yeah. don't the let me ever let go. when push as far as the into these

financing, the idea that i bought, i bought a back door and a lot of a tiny water drops the grow into a bigger office in there. but i had it. i don't know what that is, which then fall into the collector. yeah. live on the flow. yeah. into the tank. so let's do this. i'm gonna put a roller they heat allow us, you know, until they're both in total. they've collected 90000 liters of water over 2 years. water is gas on grand canal area. the reservoirs of running dry. the art conditions i'm making wildfire is more frequent in 2019 and was hit by devastating fire 10000 heck to as far as fun. down 9000 people have to be evacuated. that we'll see the look as a cuz he said that's what he meant, that it's a vicious circle below. got here, the lack of water means there's less healthy for it goes on to the way the and everything this rise on 50 because here, cuz this is her and mainly the, our fuel 50 for the fire. the funny little bucket full was full. so the reformers

think, planting trees, species that will make the forest more resilient and they also use more to from the cloud couches they ask, the florida will force the grow here get that will work like a natural fog catcher, was left on cnn trees. take the water from the clouds and pass it came to the ground as well as the internet. so that means it could be the future of the island . and i see for now the, the present is dominated by agriculture. economically, the canaries depend number non across. but each tree needs 20 liters of water a day. one where i'm on source works. i plantation in the north, a drunken nadia. he's worried about the warranty because rain is becoming ever more scarce. the never let me

see what there is one option, the treating it as expensive over there with incident double kiddos. that's what i really would do about the good large scale fields of thought catches in the mountains, be a solution, the solid or leave trusts. and the research project is working on new ways of capturing moisture from the clouds several yellows per year. they expect this metal grid to a much more efficient than the plastic mesh they've been using sofa so might have been the goal, so not too badly using a sustainable and natural resources like fog could be a good solution to figure out if it is. yeah, but uh, we could water our tree seedlings with it and everything was done and a farmer could use the water was on the plantation once it goes down to the the hour for that to work. so crowns would have to continue gathering him in the mountain sides. if there is a change in weather patterns,

cloud captures might also the full victim to climate change. after years of extreme drought and late 2023, a short rainy season, broad exceptionally heavy rains to northeast. down for a code, the ground was so dry that it couldn't absorb the water which led to severe flooding. for one of the water could be stored in the sand to help balance out the cycles of droughts and heavy rainfall. in kenya, local communities have begun implementing the sustainable solution, the honest a, c. m, a. loony is working for her future and the future of her children and grandchildren . together with other residents of oakia in southern kenya, they're building a sand down. the water stored here in the rainy season will help sustain that community to in the dry season. draught in the area was not so nice visual stuff.

we couldn't move long distance is. so we decide just how can we stay in this direction for a long time? kinda mixed up sometimes the, because of the what i no idea. the mach wendy region is no stranger to extreme weather. there are 2 short, intense rainy seasons each year. but the rain water seats away almost overnights and the rivers dry out. the sand down. we'll store this rain water in the river bed and keep it from evaporating. as quickly they fix the sun to us. is that the it at this last point that's a collect and a stores the water and basically um send, uh will provide the medium where the, the, what the at the start within the, within the sons. one me to be law will not ever for it, but it wouldn't be available for the communities. local communities do most of the work themselves. it's not always easy to find enough volunteers digging is hard

work. building the dam costs about 2000000 canyon shillings, or about 15000 bureaus. it's made of mostly local materials, like rocks and sand. once they've collected the local materials, then the other thing that you need, which comes from outside the communities this, i meant the state that is useful. this, tabulate vision of the dumb and swipe plus the team. but you can see which ones they form like of the fund. i'm not far away. there's a completed send. it can store up to 50000000 leaders of water. a boat for farmers like peterman gucci. these days he can pump water directly from the river. he mainly grows colored greens, tomatoes corn and let us and his crops are thriving, the whatever the family doesn't need is sold at the local market. the water from

the dam has made a real difference. i mean, we were supposed to plant trees, but there are no trees without water. there were so many challenges. we used to grow vegetables here, but when the water disappeared, everything withered and died without degree. because imagine you've got coke. at 1st glance, it's dry as dust here, but appearances are deceiving. 2 meters below the surface. there are millions of leaders of water all filtered by the sound. the dam has been supplying the surrounding community for 4 years now, even during the dry season and room lucila explains how it works. we have the great or we and number with the start until of what, then that's what a see what the through, by bought at that bytes to the some via and from the some. but what i pumped to start and dance, where the communities i bought to draw what the for human consumption or the rain that falls here doesn't just evaporate heat stored underground. a system of pipes

linked to a solar power unit. pumps the water to storage tanks. people here canal grow new varieties of crumbs, ones that need more water. we brand even groves, which we are not able to be brando dean, daddy, thank you for that. you be is who could you brand them where they is brand new, what i need those audio. we received corps and do it climate, but you know, we have our dunden with so we can also keep the same. women also benefit from these local sam dams which receive much of their funding from our can nova, a foundation based interest in germany. instead of walking long distances to fetch water women canal fill up their canisters directly at the local water kiosk. during the walk this on dumb luck, i size place epic on the patch of what we do during our community. mobilization is

to encourage the communities to be part of the process from the start to bent, and also we emphasize on the importance of them, but the spacing at every stage. defendants may seem simple, but for local communities they can make all the difference. their hard work here will pay off now and in the future. that's all for now. thanks for watching tomorrow today and do join us again next week for another edition of dw science show you that the shift your guides to life and it did to to you know, the latest online trend, navigate your way through the digital jungle global perspective. so we'll see you guys and show you what's possible. you decide what really message

to you in 15 minutes on the w, the sales out stadium champion wrapper, s q u, i knows how to make the most out of this thing out. people not call your on your next to me, please let us know. for him, it's not about the concerts, it's about the climate. he wants people in his home country to plant a 1000000 trees. these facts are all in pico africa. in 30 minutes from d w the not just another day. so much is happening all at once. we take time to understand this is the day i'm in that's look at

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