How to build in flood zone HQ100 EXTREM

Our property is located below the HQ100 line after the flood in the Ahr Valley

I am sorry to hear that.

I am also looking for a solution not to raise the planned house higher and am searching for the most affordable mobile flood protection solution. Since we are planning very wide floor-to-ceiling windows, dam beams are out of the question.

That sounds like denial of the situation. May it go well.

I wonder what the insurance says about setting up emergency solutions or temporary measures. In addition, we will definitely have more heavy rain events in the next few years.

Build your house high. Everything else is saving in the wrong place.

Explanation Our community participated in a program and had scenarios for flooding calculated. It started in 2018, long before the Ahr Valley. There are houses in the town center that are theoretically affected, which have never had a flooding problem. Our old house had a very high flooding risk, the new house sits 120 cm higher and is only classified as moderate. Neither the old nor the new house were below the HQ 100 line. It is about extreme events. For comparison, 100-year events would be 53 ml per hour, calculated up to 128 ml per hour of precipitation.

For you, that meant in a 100-year event water in the basement and in an extreme event the bed in the upper floor floats.

I also don't know how you arrive at 61cm level, it could also be 8m. Extreme event indeed