Understanding the role of the dynamics impacts of hyporheic zone processes on water balance and nutrient dynamis at the groundwater - surface water Interface of floodplains

了解潜流带过程的动力学影响对洪泛区地下水-地表水界面的水平衡和营养动态的作用

• 批准号: 22709851
• 负责人: Professor Dr. Stefan Krause
• 金额: --
• 依托单位: Centre for Sustainable Water Management
• 依托单位国家: 德国
• 项目类别: Research Fellowships
• 财政年份: 2005
• 资助国家: 德国
• 起止时间: 2004-12-31 至 2008-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/22709851?language=en
• 关键词: Understanding; role; dynamics; impacts; hyporheic

The aims of this research are to investigate the hydrophysical and hydrochemical controls on groundwater - surface water interactions in two different river types under baseflow conditions, and to evaluate what factors at this interface influence the transformation of the flux of redox-sensitive elements. To address these general aims, three objectives have been formulated. OBJECTIVE 1 - HYDROPHYSICAL CONTROLS ON RIVER CONNECTIVITY: To evaluate the spatial and temporal variability of water fluxes across the groundwater-surface water interface at two sites with similar aquifer properties but in contrasting hydrological and geomorphologic environments. OBJECTIVE 2 - RIVER CONNECTIVITY CONTROLS ON HYDROCHEMISTRY AND NUTRIENT FLUXES: To determine the key physical characteristics that control the flux of redox-sensitivity elements at the two sites, allowing the development of a conceptual model of aquifer to river chemical flux balance at a sub-reach scale. OBJECTIVE 3 ¿ QUANTITATIVE ANALYSES OF WATER BALANCE AND NUTRIENT DYNAMICS: To quantify water exchange and nutrient transport at the groundwater ¿ surface water interface. The experimentally gained results of objective 1 and 2 will be implemented into the IWAN model in order to improve the model adequacy regarding the reflection of hyporheic zone processes.

本研究的目的是调查水文物理和水化学控制地下水-地表水相互作用在两种不同的河流类型的基流条件下，并评估在这个界面上的氧化还原敏感元素的通量的转换的影响因素。为实现这些总目标，制定了三项目标。 目标1 -河流连通性的水文物理控制：评估两个含水层性质相似但水文地貌环境截然不同的地点地下水-地表水界面水通量的时空变异性。 目标2 -河流连通性对水化学和营养物质通量的控制：确定控制两个站点氧化还原敏感性元素通量的关键物理特性，从而可以在子河段尺度上开发含水层与河流化学通量平衡的概念模型。目标3水平衡和营养物质学的定量分析：定量地下水与地表水界面的水交换和营养物质迁移。目标1和目标2的实验结果将被应用到IWAN模型中，以提高模型在反映潜流区过程方面的充分性。