1. Dep. of Biotechnology, Chemistry and Environmental Engineering; Aalborg Univ.; Sohngaardsholmsvej 57 DK-9000 Aalborg Denmark
2. Dep. of Soil, Water and Environmental Science; Univ. of Arizona; 1177 E. Fourth St. Tucson 85721 AZ
3. COWI A/S; Visionsvej 53 DK-9000 Aalborg Denmark
4. Dep. of Agricultural and Biosystems Engineering; Univ. of Arizona; 1177 E. Fourth St. Tucson AZ 85721
5. Dep. of Agroecology, Faculty of Science and Technology; Aarhus University; Blichers Allé 20, P.O.BOX 50 DK-8830 Tjele Denmark
6. Dep. of Civil and Environmental Engineering; Graduate School of Science and Engineering, Institute for Environmental Science and Technology (IEST), Saitama Univ.; 255 Shimo-okubo Sakura-ku Saitama 338-8570 Japan