In Tiel, the Netherlands, our team covered infiltration boxes with PVC film. These permeable crates are part of a buffer field, installed under a large parking lot in an industrial area. In total, crates were covered over an area measuring 67 x 4 x 1,2 metres. Rainwater is buffered in these crates, after which it gradually infiltrates into the soil. The advantage of this system is that the sewage system is relieved because a part of the surface is disconnected. In addition, the collected water, if facilitated by the system, can be used for irrigation and flush water.
These infiltration boxes are on the rise. With a growing population, water use is increasing, but climate change is also causing more erratic weather with sometimes heavy rain showers with large amounts of precipitation. The boxes then offer a temporary way out for the large amount of rainwater to spare the sewage system. NPI has recently contributed to the installation of this type of infiltration crates in various places, including on roofs, parking lots, roof terraces, sports fields and in residential areas.