In 2016 Deltares was once again involved in a range of studies for improving water quality in the Netherlands. A good example is the WFD NUTrend. This application was built in Deltares software (FEWS) and it will be available as a web application (the Delta Viewer) in early 2017. The application provides a spatial picture of the extent to which the standards for nitrogen and phosphorus are being met in the WFD water bodies. Until now, a good nationwide overview of water quality was lacking. The nitrate app linked to the same Delta Viewer also helps to monitor water quality. The app was developed in 2016 to allow land managers, such as farmers, to measure nitrate concentrations themselves. The Monitoring Network for Nutrients in Agriculture-Specific Surface Water has shown that nutrient concentrations have been falling gradually in recent years. The new manure policy is making an effective contribution. The app is a practical measuring method that encourages people to deal sensibly with manure. We were also involved in developments in collaboration with other research organisations. We teamed up with Wageningen Environmental Research to set up a national instrument for rural water quality that simulates the nutrients in the soil, groundwater and surface water. This instrument links up with the Dutch Hydrological Instrument (NHI) and development is continuing so that it can be used in 2018 for things like the third-generation river basin management plans.
We are also testing innovative solutions in the field such as Puridrain (removing nitrates from drainage water with wood chips) or Purioever (removing phosphates with screens of iron sand). This work also involves collaboration with water managers and farmers, for example in the Dutch bulb-growing area. There is a lot of interest from both the European Union and the rest of the world.