Quantification of in situ biodegradation rate constants and mean hydraulic conductivities using a novel combined isotope methodology

在拟议的研究中，我们假设，这是可能的量化真实的有效的原位生物降解速率常数使用一种新的组合同位素方法，它结合了二维化合物特定的同位素分析（CSIA）和示踪剂为基础的（3 H-3 He）地下水测年（TGD）。此外，使用氚-氦导出的地下水年龄，我们假设，我们能够确定研究地点的平均有效导水率。该研究中心以前的所有结果都在几个国际同行评审期刊上有很好的记录。所确定的有效k值通过先前进行的液压泵测试和两个数值流动和运输模型进行验证。后者最终也用于模拟新采样的稳定同位素数据。

In the proposed study we hypothesize that it is possible to quantify real effective in situ biodegradation rate constants using a novel combined isotope methodology, which combines a two-dimensional compound-specific isotope analysis (CSIA) and tracer-based (3H-3He) groundwater dating (TGD). Furthermore, using the tritium-helium derived groundwater ages we assume that we are able to determine the mean effective hydraulic conductivity of the study site. All previous results on the study site are well documented in several international peer-reviewed journals. The determined effective k-value is validated by previously performed hydraulic pumps tests and two numerical flow and transport models. The latter is finally also used to simulate the new sampled stable isotope data.