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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
Really amazing! Regarding the river: Have you seen the Waterways Add-On by /u/Arnklit? I didn't try it myself (only got aware of it from his posts here), but looking at the demo it seems to be a perfect solution for your water problem.
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