In recent years, and landslides caused by flooding of the river due to heavy rain, the number of such flooding of houses has increased. For this reason, the number of casualties has increased due to flooding of rivers and canals. Therefore, the situational awareness of the rivers and canals in the event of a disaster is important. We are research on wireless sensor networks (WSNs) for the purpose of collecting information in a disaster situation. Also we have developed a ad-hoc water gauge system based on WSN. However, dedicated WSN can not be used for general purposes for the purpose of collecting the disaster information. Therefore, WSN aimed only use of disaster is not practical considering cost-effectiveness. We implemented a general-purpose WSN system for can be connected to the required sensors in the event of a disaster. In this paper, we describe challenges and implementation of WSN system that allows a diversity sensor connection.