Acquisition of a state-of-the-art, shallow water multibeam echo-sounding system at the University of Illinois at Urbana-Champaign (UIUC MBES)

0824930最佳本提案寻求获得高分辨率、双频、多波束回声探测（MBES）系统的资金，用于受沉积过程影响的水生系统的流体和形态动力学。提出的是来自Reson Inc.的Seabat 7125系统。该装置工作在200/400 kHz，具有128°扇区，允许0.5°X2.0°和0.25°X1.0°波束宽度。该系统将部署在一个新的22英尺长的铝制工作船上，该工作船具有双发动机、发电机和适合支持MBES的电源条件。该船/MBES系统将被安置在美国地质勘探局水科学中心，以便快速响应部署。3D数据将用于推导底部地形、床形特征和粒度分布。将评估这些属性的时间变化。将分析后向散射，以更好地了解水柱条件和跟踪气泡，鱼类和其他生物。此外，悬浮泥沙和流体速度将进行声学评估。新收购的几项研究将获得实质性的成果：1）黄石湖嗜热细菌形成的塔形，2）芝加哥的城市河道水流，3）河道汇合和分叉动力学，4）湖泊和河流中的泥沙输运，5）湖泊中的尾矿扩散和沉积，以及6）天然河流中剪切层的时空行为。研究将通过实地研究和数值模拟相结合的方式完成。MBES系统非常适合捕获多项研究所需的高分辨率、时间和空间数据。 管理计划要求UIUC和USGS组成一个委员会来监督采购、安装和MBES的使用。PI将在委员会中任职。委员会将每年安排一次用户组研讨会。MBES系统将用于所述项目，但将广泛适用于应用和社会相关的环境问题。MBES将作为本科生、研究生和博士后研究人员可以使用的设施的基础。MBES将允许与USGS直接接口，并纳入面向任务的项目。

0824930Best This proposal seeks funding to acquire a high-resolution, dual-frequency, multibeam echo-sounding (MBES) system for fluid and morpho-dynamics of aquatic systems impacted by sedimentary processes. Proposed is a Seabat 7125 system from Reson Inc. This unit operates at 200/400 kHz and has a 128° sector allowing 0.5°X2.0° and 0.25°X1.0° beam widths. The system will be deployed on a new 22-foot aluminum workboat with twin engines, generator and power supply conditions appropriate for supporting the MBES. The boat/MBES system will be housed a t the USGS Water Science Center allowing rapid response deployment. 3D data will be used to derive bottom topography, bedform characteristics and grain size distributions. Temporal variation in these properties will be assessed. Backscatter will be analyzed to better understand water column conditions and track gas bubbles, fish, and other organisms. Additionally, suspended sediment and fluid velocity will be assessed acoustically. Several studies which will gain substantially from the new acquisition are 1) spire tower formation by thermophilic bacteria in Yellowstone Lake, 2) ubran channel flow in Chicago, 3) river channel confluence and bifurcation dynamics, 4) sand transport in lakes and rivers, 5) mine tailing dispersal and sedimentation in lakes, and 6) the temporal and spatial behavior of shear layers in natural rivers. Studies will be completed through a combination of field study and numerical simulation. The MBES system is perfectly suited to capturing high-resolution, temporal and spatial data needed for multiple studies. The management plan has UIUC and USGS forming a committee to oversee purchase, Installation and MBES usage. The PIs will serve on the committee. The committee will arrange yearly user-group workshop(s). The MBES system will be utilized for stated projects, but will have broad applicability to applied and societally-relevant environmental concerns. The MBES will serve as the foundation for a facility accessible to undergraduate and graduate students and post-doctoral researchers. The MBES will allow direct interfacing with the USGS and incorporation in mission-oriented projects.***