Aquatic Sciences Meeting, Albuquerque 2001
| PC18 Biogeochemical Cycles |
| Date: Thursday, February 15, 2001 |
| Location: Southwest Hall |
| |
| Salvia-Castellvi, M, , CRP-Gabriel Lippmann, 162A, avenue de la Faiencerie, L-1511, Luxembourg, salvia@crpgl.lu |
| Mosig, J, , CRP-Gabriel Lippmann, , Luxembourg, |
| Iffly, J, F, CRP-Gabriel Lippmann, , Luxembourg, |
| Vander Borght, P, , Fondation Universitaire Luxembourgeoise, Arlon, Belgium, |
| Hoffmann, L, , CRP-Gabriel Lippmann, , Luxembourg, |
| |
| SPATIAL AND TEMPORAL VARIABILITY OF THE NUTRIENT FLUXES IN A RURAL BASIN: THE HAUTE-SURE WATERSHED (BELGIUM-LUXEMBOURG) |
 |
| Nitrate, SRP and total-P export coefficients were determined for the Haute-Sūre watershed (360 km2) and several sub-basins of different sizes and land use. Results show a large variability of NO3-N export fluxes between forested (<10 kg N ha-1 yr-1), agricultural (50 kg N ha-1 yr-1) and mixed catchments (15-20 kg N ha-1 yr-1). For SRP and total-P, no significant differences were found concerning the agricultural impact. Land and bank erosion govern the total phosphorus massflow (0.4 - 1 kg P ha-1 yr-1). SRP fluxes ranged between 10% and 30% of the total phosphorus mass.
However, export coefficients do not reflect the annual variability of the nutrient fluxes, which was very important in all the cases and very closely linked with the hydrological regime. Thus, between December and February, 80% of the annual N and P fluxes were measured.
|
| |
| This Session Listing
|
Home | Information | Employment | Education | Meetings | Policy | Publications | Students | Forms | Search
Copyright © 2002 American Society of Limnology and Oceanography. All Rights Reserved
