The overall purpose of the project is to generate a base for recommendations for construction of new subsurface drainage and re-drainage of clay soils in the area Water - resource efficient management. Efficient drainage of arable land is important to increase crop production, to achieve environmental goals for eutrophication and to reduce effects of climate change (frequent heavy rainfall and dry periods). We want to investigate how different filter materials affect the sediment deposition in the drainage pipes, nutrient leakage of nitrogen and phosphorus as well as yield and quality of the crop. We will also assess the need for maintenance and the long-term sustainability of drainage systems. The results will guide farmers to encourage them to make necessary investments and efforts.
The project is at levels 4-7 on the TRL scale: the field trial will be a combination of applied research (TRL4), concept verification of the filter material (TRL5) and a demonstration in the field (TRL7).