Wendland F, Kunkel R, Grimvall A, Kronvang B, Müller-Wohlfeil D I
Research Centre Jülich, Programme Group Systems Analysis and Technology Evaluation, Germany.
Water Sci Technol. 2002;45(9):285-92.
The SOIL-N/WEKU model system was developed to estimate groundwater-borne nitrogen inputs into river systems. The core of this model system is composed of a soil nitrogen leaching model (SOIL-N) and a groundwater residence time/denitrification model (WEKU). The application of the model system was carried out in the framework of the EU-project RANR (Regional analysis of subsurface nitrogen retention and its impact on the nitrogen export from land to sea) for a macroscale study river basin in Germany (the Uecker basin, ca. 2,400 km2) and a mesoscale study catchment area in Denmark (the Gjern basin, ca. 200 km2). For both catchment areas, the modelled average nitrogen loads leached into the groundwater were about 40 kg N/ha a, while the remaining groundwater-borne nitrogen intake to rivers was quantified to an average of about 2 kg/ha a. The comparison with observed groundwater-borne riverine nitrogen loads showed a very good agreement, proving the key role nitrogen retention in groundwater plays in the two catchment areas.
SOIL-N/WEKU模型系统旨在估算河流系统中地下水携带的氮输入量。该模型系统的核心由土壤氮淋失模型（SOIL-N）和地下水停留时间/反硝化模型（WEKU）组成。该模型系统在欧盟项目RANR（地下氮滞留区域分析及其对陆地向海洋氮输出的影响）框架内，针对德国的一个宏观尺度研究流域（厄克河流域，约2400平方公里）和丹麦的一个中尺度研究集水区（耶恩流域，约200平方公里）进行了应用。对于这两个集水区，模拟得出的淋溶到地下水中的平均氮负荷约为40千克氮/公顷·年，而剩余的地下水携带的河流氮摄入量平均约为2千克/公顷·年。与观测到的地下水携带的河流氮负荷进行比较，结果显示出非常好的一致性，证明了地下水氮滞留在这两个集水区中所起的关键作用。
