Being a Hydrologist, Maartje works at Waternet as a senior project manager and consultant. She knows all about the importance of securing the right water levels in the city and how to regulate them. When too much water is in the city, it needs to be pumped out. This happens at IJmuiden, where excessive water gets pumped into the sea. At times of drought on the other hand, large amounts of water are being pumped into Amsterdam from the IJsselmeer. How to regulate this well? Maartje Faasse tells us about her work.