Wireless Sensor Networks (WSNs) can be deployed to observe physical phenomena such as pollution, flooding, insect invasion, and land degradation. Deploying wireless systems are able to overcome physical constraints such as point to point radio propagation and physical sensing coverage. By building executable cell systems, we have shown that a number of conditions can be evaluated. Examples are line of sight computation and wind or water propagation in complex geographic situations. This paperexplains a method to produce automatically parallel simulators that can be federated later to address the whole problem of deployment design and physical phenomena modelling and simulations. This work was developed in an international group (SAMES) with the purpose of building and validating tools to ease observation and control aimed at understanding environment evolution and risk reduction.