Developing and Testing a Robust and Reliable Field Method for In-Situ Analysis of Dissolved Gases in Streams

开发和测试一种稳健可靠的现场方法，用于流中溶解气体的原位分析

• 批准号: 319532957
• 负责人: Professor Dr.-Ing. Olaf A. Cirpka
• 金额: --
• 依托单位: Earth Surfaces Processes Division
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/319532957?language=en
• 关键词: Developing; Testing; Robust; Reliable; Field

Reliably measuring dissolved concentrations of major and trace gases enables assessing the dynamics of water fluxes and biochemical turnover in aquatic systems. We want to establish a robust and reliable method for on-site gas-tracer measurements and continuous gas monitoring in rivers using a gas-equilibrium membrane inlet mass spectrometer capable of measuring concentrations of dissolved gases in a quasi-continuous manner. We further want to develop a consistent method for the determination of reaeration rate coefficients in streams using the mentioned field gas analyzer to determine the loss of dissolved gas tracers and the concentration of dissolved oxygen in streams and the hyporheic zone. Towards this ends we will adapt the instrument for gas-tracer tests in streams and test the applicability of different gas tracer compounds (namely noble gases and propane), conduct and evaluate gas-tracer tests in streams close to Tübingen, and adapt the method for small water volumes to make the application together with mini piezometers in the streambed feasible. The reliable measurements of injected gas tracers and dissolved oxygen will help to disentangle the interacting processes of gas-exchange, photosynthesis, and aerobic metabolism of dissolved oxygen in streams.

可靠地测量主要气体和痕量气体的溶解浓度，可以评估水产系统中水通量和生化周转的动态。我们希望使用一种能够以准连续方式测量溶解气体的浓度来建立一种可靠的可靠方法，用于使用气体平衡膜入口质谱仪在河流中进行现场气体跟踪测量和连续气体监测。我们进一步希望使用上述野战气体分析仪开发一种一致的方法来确定流中的重新速率系数，以确定溶解气体示踪剂的损失以及溪流中溶解氧的浓度和低潮区。为此，我们将调整该仪器在流中进行燃气跟踪测试，并测试不同气体示踪剂化合物（即贵重气体和丙烷）的适用性，进行和评估在Tübingen附近的溪流中进行和评估燃气跟踪测试，并适应小水容量的方法，以使小型水量与小型Piezometers在流层式菲斯特型中相同。注入的气体示踪剂和溶解的氧气的可靠测量将有助于解散溪流中溶解氧的气体交换，光合作用和有氧代谢的相互作用。

项目成果

Advancing stream-tracer techniques and their mathematical analysis

先进的流跟踪技术及其数学分析

• DOI: 10.15496/publikation-18510
• 发表时间: 2017
• 作者: Julia Knapp