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首页> 外文会议>Symposium on Water Quality and Sediment Behaviour of the Future: Predictions for the 21st Century >Groundwater-surface water exchange fluxes in a Pleistocene lowland and the impacts on riparian zone water balance and nitrate conditions
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Groundwater-surface water exchange fluxes in a Pleistocene lowland and the impacts on riparian zone water balance and nitrate conditions

机译：全胞外水面水交换助水助条质，对河岸区水平和硝酸盐条件的影响

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摘要

Water balance and groundwater nitrate dynamics within the riparian flood plain of the Havel River in northeast Germany are investigated by experimental analyses as well as by model simulations, using a coupled soil water balance and groundwater model approach. The model simulations indicate a substantial impact of exchange fluxes across the groundwatei-surface water interface on the riparian water balance, the river discharge, as well as on the nitrate dynamics within the gioundwater and river. Experimental and model-based results give evidence that the impact of groundwater contributions and associated nitrate fluxes from the riparian flood plain are temporally very variable. Substantial seasonal variations in the riparian groundwater-borne nitrate contributions to river discharge are observed. Hence, nitrate contributions from the groundwater represent a significant proportion of the observed loads in the Havel River during summer, when discharge and nutrient conditions in the surface waters are crucial for the ecological health of the lowland river.
机译：通过耦合土壤水平和地下水模型方法，通过实验分析研究了东北地德河道河岸河岸洪水河河洪水中的水平和地下水硝酸盐动力学。模型模拟表明，在河岸水平，河流放电以及河流水中的河流排放和河流内的硝酸盐动力学中，交换通量的实质性影响。实验和基于模型的结果证明了地下水贡献和相关硝酸盐通量从河岸洪水的影响暂时非常可变。观察到河流地下水传播对河流放电的大量季节变化。因此，当地下水期间，硝酸盐来自地下水的季度代表了夏季哈维尔河中观测到的载荷的大量比例，当表面水处的放电和养分状况对于低地河流的生态健康至关重要。

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