The small river Aa was canalized between Erp and Veghel between 1937 and 1941. Meadows and marshes lay along the river, which meandered through the landscape during this period. Many of these meadows were flooded in the winter. To put an end to the flooding, the meanders and bends were removed, something that was done at the time using shovels and wheelbarrows, with excavators hardly being used. The water subsequently flowed so fast that the land dried out, but after periods of heavy rain, this caused new problems because the water had nowhere to go during floods. In 2004, it was agreed to give the Aa more space between Veghel and Erp. The banks have been lowered in a number of places. A more natural transition has been created between the bank and the river. In some places, wider zones have been created that can flood again and serve as water storage; these zones consist of grassland with flowers that form a beautiful scene, especially in spring and summer. Furthermore, the stream valley consists of hedgerows, groves, and pools that make it scenically attractive as a walking area. In 2025, work began south of Erp to make the Aa stream valley climate-resilient. Between Erp and Veghel, it is being assessed what else is needed to make this part of the stream valley climate-resilient following the construction of a water storage area and an ecological corridor.