The village of Etteln in the municipality of Borchen, Germany has actively invested in digital transformation during the last years, with complete FTTH (fiber to the home) coverage of the interior of the village and of 50 houses and farms in the outer area of Etteln, with the introduction of a village App and of an e-village car connected with the Internet, and with the deployment of a LoRaWAN (The Sensor Things net) network for delivering the data from sensors spread on the territory for measuring groundwater and surface water associated. Such sensors represent an important and relevant step for the sustainable development of the village, taking into account its flood protection needs. Even though the last major flood in July 1965 was a long time ago, surface water protection is essential for the sustainable common good of the village. In recent years, the Altenau river has been drying up more and more frequently during the summer. At the same time, heavy rain events increasingly lead to partial flooding situations. Digital recording and evaluation of river levels, groundwater level, rain volume, and bulk volume of springs in the locality in comparison with weather events can objectify these discussions. This is a useful preparation for the further planned renaturation measures of the river.