In the EU project Hydrosys (http://www.hydrosysonline.eu), we have defined and implemented a data processing pipeline that makes simulation process completely automated, fast and transparent to the scientist. Furthermore, our automated simulation tool is fault-tolerance and limits the space for introducing errors. A scientist can visualize or download sensor data, or run a simulation and obtain the results in the same web-based GUI. The environmental model employed is GEOtop (http://www.geotop.org), which is a distributed model of the mass and energy balance of the hydrological cycle for simulations in continuum in small catchments. However, our approach is generic-enough to be include arbitrary environmental models.