Abstract: | The nutrient and heavy metal emissions by point and diffuse sources were estimated for 45 sub catchments of the Odra basin for the period 1993-1997 by means of the Models MONERIS, MODEST and NIIRS. The approach distinguish between 6 different diffuse pathways and the point discharges from municipal waste water treatment plant and industry. For nitrogen total emissions of 124 ktN/a were estimated for the Odra basin. 64% of these emissions were caused by diffuse sources (mainly groundwater and tile drainage). For Phosphorus the emission was 12.8 ktP/a, with a contribution of diffuse sources to this sum of 38%. The comparison of calculated and observed loads shows that the mean deviation for the investigated sub catchments of Odra is 22% for nitrogen and 32% for phosphorus. The spatial resolution of the emission calculations allows the identification of regional hot spots and the derivation of specific regional measures to reduce the emissions into the Odra. For the heavy metals emissions of 10,8 t/a (Cd), 175 t/a (Cu), 113 t/a (Pb) and 1190 t/a (Zn) were estimated. Für 45 Teilgebiete der Oder wurden mit Hilfe der Modelle MONERIS, MODEST und NIIRS die Nährstoff- und Schwermetallemissionen von punktuellen und diffusen Quellen für den Zeitraum 1993-1997 quantifiziert. Insgesamt wurde zwischen 6 verschiedenen diffusen Eintragspfaden unterschieden und darüber hinaus die |
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PDF: | behrendt_etal_2001.pdf (36.356.779 Bytes) | |
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