Rainwater harvesting is active flood protection.

Hello - due to current events - it should be clear by now, after such gigantic floods, even to the last person that one main cause of the flooding is the rapid runoff of rainwater through our gigantic sealed surfaces! The most important measures that must now be taken nationwide: tear up your sealed surfaces - green the roofs and install grass grid plates and rainwater systems! Every RW system is a small retention basin. If some obstinate planners, water suppliers, and waste managers would just think it over.... They would rather build retention basins and dike systems at the state's expense for billions.

In the end, everything either ends up in the sewer or in the groundwater, and when it rains as heavily as it does now, it only helps to give the rivers more space.

And the water from the tap comes from where? Do you seriously think everyone should bury a small tank in the garden? Right next to the CO2 tank, so that not so much CO2 gets into the environment?

The problem lies there, as [Der Da] writes: natural river landscapes instead of straightened fast shipping waterways (nice word)

There is a f.... ShipSailing missing :) The new spelling makes such words even nicer :)

There is something to it - of course the waterways need to be worked on. However, when investigating a problem in principle, it is always initially about uncovering the causes. Don’t worry, I don’t want to start a discussion about global warming, etc. - but it is indisputable that the rainwater runoff ends up too quickly in the sewage system and rivers - precisely because of the gigantic sealed surfaces that are constantly increasing on a large scale. If the water arrives with a time delay, it causes less damage, and as we have now learned again, it often comes down to a difference of a few centimeters in water level as to whether cities flood or not. Please also consider in this context heavy rain events caused by thunderstorms with corresponding heavy downpours, where 80, 100 or more liters per square meter fall within a few hours - with corresponding sewer backflow and floods, etc... all of this is connected. It simply makes no sense to build increasingly larger channels and retention facilities with gigantic effort before one has worked on the fundamental causes. The economic damages are immense - not only due to large floods - see the relevant RIMAX and URBAS studies already conducted by the Ministry of Environment or Ministry of Economy. Small de-sealing measures, etc., when applied on a large scale, have great effects - see studies by Prof. Sieker. It’s not as if there is no positive evidence for this approach - and here again the question arises as to which approach yields the greater benefit for how much investment - and the advantage is provenly clearly on the side of nature-oriented rainwater management.

There's a f.... shipSailing missing :) The new spelling makes such words even nicer :)

The new one can kiss my ass!!! :cool:

That only applies if I make a typo!

But to the topic: Isn't the problem, as always, the people themselves? Building so close to the river? Continuously developing (and sealing) more land, and around here there's plenty of space by the Rhine. But then you can't cry about it afterwards!
But I wash my hands in innocence: Here EVERYTHING MUST drain rainwater :rolleyes: