How does preferential flow influence carbon transport and changes between DIC, DOC and POC? Advances with combined modeling and stable isotope approaches (Pref-Carb-Flow)

在布拉格捷克工业大学(CTU)水力与水文学系(DHH)土木工程系(FCE)和Erlangen大学应用地质学教席的共同努力下，将研究二氧化碳、溶解无机和有机以及颗粒有机碳(DIC、DOC和POC)周转和输送的作用，重点是优先流及其模拟。研究区域是捷克共和国吉泽拉山脉的Uhlirska流域，该流域位于花岗岩基岩环境中，因此覆盖了对酸敏感的地形，具有强烈的可变--但到目前为止限制很差--碳动态。后者是由活跃的酸性风化、泥炭和其他富碳土壤的部分覆盖造成的。这里提议的工作是对反恐联盟向捷克科学基金会(GACR)提交的一份平行报告的高度补充(水、碳和热的地下运输--水文、地球化学和同位素相结合的方法)。这是因为为该试验区开发的新模型可以量化流动路径，并使用水的稳定同位素进行了校准。因此，它们是扩展到碳循环研究的理想基础，包括相关的同位素分布、停留时间和集水区中最重要的储存和周转分区。此外，历史和新数据以及基础设施、实地和实验室工作将通过这种方法在有关研究小组之间共享。

In a joint effort between the Department of Hydraulics and Hydrology (DHH), at the Faculty of Civil Engineering (FCE) at the Czech Technical University in Prague (CTU) and the chair of Applied Geology at the University of Erlangen, the role of CO2, dissolved inorganic and organic as well as particulate organic carbon (DIC, DOC and POC) turnover and transport will be investigated with particular focus on preferential flow and its modeling. The study area is the Uhlirska Catchment in the Jizera Mountains of the Czech Republic that lies in a granitic bedrock environment and thus covers an acid-sensitive terrain that has strongly variable --and so far poorly constrained -- carbon dynamics. The latter are caused by active acid weathering, partial cover by peats and other carbon-rich soils. The work proposed here is highly complementary to a parallel submission by partners from CTU to the Czech Science Foundation (GACR) (Subsurface transport of water, carbon and heat - combined hydrological, geochemical and isotopic approach). This is because newly developed models for this test area can quantify flow paths and were calibrated with stable isotopes of water. They are thus an ideal foundation for expansion to carbon cycle investigations with associated isotope distributions, residence times and the most important compartments of storage and turnover in the catchment. Furthermore historic and new data as well infrastructure, field- and laboratory efforts will be shared between the involved research groups via this approach.