Optimal design of sensor networks is a key procedure for improved water management in a wide sense, as it provides information about the states of any water system. Hydrometric sensor networks provide data about hydrological variables of interest for a specific purpose. Traditionally, these networks consist of sensors that remain fixed in selected locations during long time periods. Some of the limitations of using dynamic sensors for monitoring precipitation are related to the difficulties using the acquired information, reliability of the measurements, and absence of conceptual development for integration. Develop and improve methods for optimal design of dynamic rainfall sensor networks with varying physical topology, in heterogeneous data environments for operational hydrological systems. Optimal observations can only be achieved by using dynamic sensors in dynamic environments. The chapter also presents an overview of the key concepts discussed in this book.