We present the development of the River Platform for Monitoring Erosion (RIPLE) designed for monitoring at high temporal frequency (∼10 min) of water discharge, solid fluxes (bedload and suspended load) and properties of fine particles (settling velocity) in mesoscale rivers, i.e. which drain mesoscale catchments (≈10–10³ km²). This platform responds to a request to continuously measure these variables in rivers using a single, centralized device, and to do this in the most direct way possible. The platform integrates the following instruments: (i) for water discharge, water level radar, and surface velocity radar, digital cameras and an echo sounder; (ii) for fine sediment load, turbidimeters and automatic samplers including the SCAF (a sediment settling velocity characterization device); (iii) for bedload, a hydrophone; and (iv) for water quality, a conductivity probe and water sampling. As far as water discharge monitoring is concerned, priority has been given to non-intrusive instruments to improve the robustness of the system. All the instruments are driven by a data logger (Campbell^® CR6), which locally stores the data and then uploads them to a remote server every hour during the day using a 3G modem. SMS (Short Message Service) alerts can be sent depending on scheduled conditions (e.g. low battery voltage, water level threshold, all samples of the automatic sampler collected). The platform has been designed to be as autonomous as possible: it is powered by a battery that is supplied by a solar panel. Limiting the power consumption of the platform was one of the main technical challenges because of the quantity of instruments integrated. A simple 100 W solar panel is sufficient to power the entire platform, even during winter or low insulation conditions. A user-friendly interface has been developed, enabling to visualize the data collected by the platform from an internet connection. It is also possible to remotely configure the platform within this interface, e.g. to modify water sampling thresholds or alert thresholds. Finally, the platform is relatively easy to move from one site to another, because its installation requires little civil engineering. To date, RIPLE has been tested on two rivers of the Alps in France: the Romanche river in Bourg d'Oisans from September 2016 to July 2018 and the Galabre river in La Robine sur Galabre since October 2018, demonstrating the proper functioning of the platform.

中文翻译：

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自主的低功率仪器平台，用于监测中尺度河流的水和固体排放

我们介绍了河流侵蚀监测平台（RIPLE）的开发情况，该监测平台旨在监测 中尺度河流中的高时间频率（〜10分钟）的排水量，固体通量（床载和悬浮载荷）和细颗粒物性（沉降速度） ，即，漏极尺度集水区（≈10 -10 ³ 公里²）。该平台响应使用单个集中式设备连续测量河流中这些变量的要求，并以最直接的方式做到这一点。该平台集成了以下仪器：（i）用于排水，水位雷达和表面速度雷达，数码相机和回声测深仪；（ii）用于精细的泥沙负荷，浊度计和包括SCAF（泥沙沉降速度表征装置）在内的自动采样器；（iii）对于睡床，水听器；（iv）对于水质，电导率探头和水采样。就排水监控而言，非侵入式仪器已被优先考虑以提高系统的耐用性。所有的仪器由数据记录器（坎贝尔驱动^®CR6），它将数据本地存储，然后在一天中每小时使用3G调制解调器将其上传到远程服务器。可以根据计划的条件（例如电池电压低，水位阈值，自动采样器的所有采样）发送SMS（短消息服务）警报。该平台的设计具有尽可能的自治性：它由太阳能电池板提供的电池供电。由于集成的仪器数量众多，限制平台的功耗是主要的技术挑战之一。一个简单的100 W太阳能电池板就足以为整个平台供电，即使是在冬天或绝缘条件较低的情况下。开发了一个用户友好的界面，可以可视化平台从Internet连接收集的数据。也可以在此接口内远程配置平台，例如修改水采样阈值或警报阈值。最后，该平台相对容易从一个站点移动到另一个站点，因为其安装几乎不需要土木工程。迄今为止，RIPLE已在法国阿尔卑斯山的两条河上进行了测试：2016年9月至2018年7月在布尔格·德奥伊桑斯的罗曼奇河和2018年10月以来在加勒贝拉河畔罗滨的加拉布雷河，证明了该平台的正常功能。