Impact of agricultural N-regulation on groundwater and surface waters in Denmark - Advances in hydrogeochemical system understanding
Abstract
The escape of reactive N from agricultural soils results in adverse environmental and human health impacts, including eutrophication of freshwater and estuarine ecosystems and groundwater and drinking water nitrate contamination. Since the 1980'ies increasing prosperity and growth in the Danish society and reduced environmental impacts have been accomplished through mostly national one-fit-all regulation of the N management in agriculture by introducing different N-mitigation measures. However, the latest Danish monitoring results on very young groundwater shows signs of deterioration due to increasing and relative high nitrate trends and concentrations. Therefore, there is an environmental, and economically need to create new knowledge and find new solutions for future more efficient N-regulation of Danish agriculture. We will show that the way forward is targeted regulation adapted to site-specific hydrogeological and geochemical characteristics of the subsurface of the catchment. This is possible by using new geophysical, hydrogeological and geochemical techniques, data acquisition tools and advances providing a very detailed hydrogeochemical system understanding of the subsurface.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2019
- Bibcode:
- 2019AGUFM.H51G..06H
- Keywords:
-
- 0470 Nutrients and nutrient cycling;
- BIOGEOSCIENCES;
- 1630 Impacts of global change;
- GLOBAL CHANGE;
- 1831 Groundwater quality;
- HYDROLOGY;
- 1871 Surface water quality;
- HYDROLOGY