Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1016/S0273-1223(99)00423-0
Title (Primary) Assessing the impact of agricultural land use changes on water quality
Author Meißner, R.; Seeger, J.; Rupp, H.; Balla, H.
Source Titel Water Science and Technology
Year 1999
Department BOPHY; BOFO
Volume 40
Issue 2
Page From 1
Page To 10
Language englisch
Keywords land use change; lysimeter experiment; nitrogen; scaling-up; set-aside; water balance

To study and predict environmental impacts of land use changes on water quality we conducted different types of lysimeter experiments. All of them are linked to representative experimental catchment areas in the field. This allows the verification and extrapolation of lysimeter results. The objective of this paper is to discuss a strategy for using and scaling-up of lysimeter results to a field and catchment scale. It will be shown that the N-loss determined with lysimeters falls within the variation of N-balance based model calculations, and also within ground water recharge rates calculated with models commonly used in hydrology. Extrapolation of lysimeter data to a catchment with similar soils provides a reliable basis for estimating the N-leaching caused by a change in agricultural land use. On the basis of the N-loss from the soil and the N-load of the stream, the calculations show that an increase in the proportion of one year rotation fallow from 10 to 25% results in nearly a 10% increase in the N-load of the stream. However, from the point of view of protecting drinking water quality, rotation fallow for one year is not recommended because of the resulting intensified leaching of nitrates.

Persistent UFZ Identifier
Meißner, R., Seeger, J., Rupp, H., Balla, H. (1999):
Assessing the impact of agricultural land use changes on water quality
Water Sci. Technol. 40 (2), 1 - 10 10.1016/S0273-1223(99)00423-0