Structural Controls of the Hydrological Functioning of a Floodplain (P03)

在中等气候条件下典型的中部集水区，洪泛平原的地下水主要流向下游。然而，洪泛区的水文功能也与主要水文地质特征的存在与否有关，并取决于当地地下水系统与不同洪泛区边缘的联系。该项目的目标是阐明决定水和溶质通量并控制洪泛平原边缘氧化还原反应性的水文地质驱动因素。我们通过地球物理和水文地质技术确定了边缘对漫滩总体通量和溶质转换的相对重要性。这些结果是解释物理和生物地球化学数据并将其输入随机地下水模型的先决条件。

In typical midland catchments in moderate climate, groundwater flow in floodplains is mainly down-valley oriented. However, the hydrological functioning of floodplains is also linked to the presence or absence of major hydrogeological features, and depends on the connection of the local groundwater systems to different floodplain margins. The goal of this project is to elucidate the hydrogeological drivers that determine water and solute fluxes across and control the redox reactivity at floodplain margins. We determine the relative importance of the margins to the overall fluxes and solute turnover in the floodplain by geophysical and hydrogeological techniques. The results are a prerequisite for the interpretation of physical and biogeochemical data and feed into the stochastic groundwater models.