Reactive transport

DyaDeep将揭示高能海滩下海洋-陆地相互作用的功能和相关性，在那里，我们建议深层地下充当一个动态生物反应器和独特的微生物栖息地，影响元素净流入海洋的通量。为实现这一目标，六个次级项目将在联合实地运动、共享抽样方法以及实验工作中进行合作，并以综合方式使用数学模型。到目前为止，地下河口(STE)中的反应输运过程几乎没有得到数值反应输运模型的支持。在地下水科学中，反应运移模型已被证明是解开和量化水动力和生物地球化学过程的耦合、非线性和典型的非直观相互作用的不可或缺的工具。在假定的高能海滩下的深层动态生物反应器中应用反应输运模型是一种具有挑战性但很有希望的方法来解开和阐明许多相互交织的过程。P6分项目将支持拟议的研究单位，其目的是了解受高度瞬变边界条件制约的深部STE中的这些复杂过程。在与项目伙伴(P1-P5)的密切合作和稳定反馈下，我们将开发能够描述目标实验室实验中的过程和效果以及现场尺度系统的复合行为的反应传输模型。由此产生的现场尺度模型将量化各个过程的影响以及进出生物反应器的材料通量。我们将与子项目P1合作，将最终的现场规模的反应性交通模型应用于具有世界上高能量海滩代表性的各种现场规模的条件，从而支持DyaDeep第二阶段的规划。

DynaDeep will unravel the functionality and relevance of marine-terrestrial interactions below high-energy beaches, where we propose the deep subsurface to act as a dynamic bioreactor and unique microbial habitat affecting elemental net fluxes to the sea. To reach this goal, six subprojects will cooperate in joint field campaigns, shared sampling approaches as well as experimental work and use mathematical models in an integrative approach. Reactive transport processes in subterranean estuaries (STEs) have hardly been studied to date with the support of numerical reactive transport modelling. In groundwater science, reactive transport modelling has proven itself as an indispensable tool to untangle and quantify the coupled, nonlinear and typically non-intuitive interplay of hydrodynamic and biogeochemical processes. Applying reactive transport models in the postulated deep dynamic bioreactor below high energy beaches is a challenging yet promising way to unravel and elucidate the many intertwined processes. Subproject P6 will support the proposed research unit in its aim to understand these complex processes in the deep STE subject to highly transient boundary conditions. In close cooperation with and with steady feed-back from the project partners (P1-P5) we will develop reactive transport models capable of describing the processes and effects in the targeted laboratory experiments, as well as the composite behavior of the field-scale system. The resulting field-scale model will quantify the effects of the individual processes as well as the material fluxes in and out of the bioreactor. In cooperation with subproject P1 we will apply the final field-scale reactive transport model to a wide spectrum of field-scale conditions that are representative for high energy beaches in the world, thereby supporting the planning of Phase 2 of DynaDeep.