Aquonst, a Constellation for Aquoa, is a project on using (FREE) Satellite Images and processed data on NASA servers in a Big Data platform to know more about Surface Waters and their Resources and Reservoirs. So, there will be a management plan to control and use these water resources in the best way. Adding IoT technology to this system and using a Cubesat constellation, the Resources and Reservoirs may be monitored directly and usage control may be applied. The constellation not only can serve this task, may be used for other added value service, such as Natural Disaster Management. Future generations of the constellation may be equipped to more sensors to work as an Early Warning system, as well.