Measurement of mass transfer in rivers and shallow waters

请求提供资金，用于购买测量河流和其他浅水沃茨质量转移的研究工具，其中包括一个可在实地部署的速度计和一个卫星接口河床高程记录器。测量包括三维速度（2 Hz采样），水深浅至2 cm，速度低至1 mm/s沿着，河床高程精度为1 cm。需要这样的测量来估计对估计速率（例如，速度），重要的化学物质和颗粒（即，溶解的和颗粒物质;标量）移动通过浅水沃茨，以及它们朝向和远离河床移动的速率（例如，从速度测量得到的参数）。我的实验室特别感兴趣的是质量传递与重要的生物地球化学过程的相互作用，涉及水生生物，包括浮游植物，水生植物和双壳类。这些生物体对流体动力学作出反应，因为除其他外，质量转移提供了它们的营养和食物来源，并影响了它们利用这些营养和食物的能力。还必须指出，这些生物体构成河流生态系统内生产和消费方面的水生食物链的基础，并可作为人类活动对下游河流和湖泊影响的指标。

Funds are requested for the purchase of research tools for the measurement of mass transfer in rivers and other shallow waters, which consists of a field deployable velocimeter and a satellite-interfaced riverbed elevation recorder. The measurements include velocity (2 Hz sampling) in three dimensions, at water depths as shallow as 2 cm, and at velocities as low as 1 mm/s along with riverbed elevation to 1 cm accuracy. Such measurements are required to estimate parameters key to estimating the rates (e.g., velocities) at which important chemicals and particles (i.e., dissolved and particulate matter; scalars) move through shallow waters, and the rates at which these move toward and away from riverbeds (e.g., parameters derived from velocity measurements). My lab is particularly interested in the interaction of mass transfer with important biogeochemical processes involving aquatic organisms including phytoplankton, aquatic plants and bivalves. These organisms respond to hydrodynamics because among other things mass transfer delivers their nutrients and food sources and affects their ability to utilize them. It is also important to note that these organisms form the base of aquatic food chains in terms of production and consumption within river ecosystems and may serve as indicators of anthropogenic impacts on rivers and lakes downstream.