Around the world, the availability of clean irrigation water is under increasing pressure. In many regions, rainwater is no longer sufficient, and groundwater extraction is being heavily restricted by tightening regulations. As a result, surface water is becoming an increasingly considered alternative. Drawing on years of expertise in water treatment and irrigation technology, Van der Ende Group has studied how surface water can be used responsibly as a supplementary source.
While surface water may seem abundant, using it effectively requires a careful and informed approach. Its composition can vary widely, influenced by three key categories. Ruud Schulte from Van der Ende Group outlines them.
Seasonal influences, such as algae growth and evaporation in summer, nutrient inflow and sediment runoff during heavy spring and autumn rains, and even freezing or increased salt levels due to road salt in winter; Environmental factors, like nearby farmland or industrial zones that may introduce pesticides, heavy metals, pharmaceutical residues, or other contaminants; Water parameters, including electrical conductivity (EC), organic load (such as natural organics or chemical residues), microbiological contamination (bacteria, viruses, algae), and the amount of suspended solids.
Ruud explains: "This constantly changing composition means customized solutions are needed for filtration, disinfection, and in some cases even desalination. Standard drinking water treatment methods often aren't sufficient, as irrigation has different demands, especially in terms of water quality, operational reliability, and cost efficiency."
© Annet Breure | HortiDaily.comMicha van Nieuwkerk and Danny Vis on behalf of Van der Ende Group at HortiContact 2025
Measuring
The process begins with a site analysis, which looks at the location of the surface water body and identifies potential sources of contamination. "Next, long-term water quality monitoring is essential, ideally for at least twelve months, to gain insight into seasonal fluctuations throughout the year," Ruud explains. Based on these findings, a custom water treatment system is designed, tailored to both the specific properties of the water and the irrigation needs of the end user.
When properly assessed and treated, surface water can be a valuable addition to existing water sources. "It requires an integrated approach that brings together technical expertise, local conditions, and seasonal dynamics. Only then can you develop a sustainable and reliable irrigation system that minimizes risks and supports long-term water stability."
Van der Ende Group has conducted in-depth research on this topic and is a recognized specialist in water treatment and sustainable irrigation solutions. If you'd like to learn more, you're welcome to reach out to one of Van der Ende's experts or request the full whitepaper on this subject.
For more information:
Micha van Nieuwkerk
Van der Ende Group
info@vanderendegroup.com
https://www.vanderendegroup.nl/