A combination of measurement scales, including remote sensing and field investigations are utilized to create databases of both natural and artificial environmental and topographic changes that are associated with disasters. At the same time, new disaster investigation and analysis methods are developed and advanced, the integrity of watersheds and hydrologic structure are examined, disaster condition models, three dimensional geology models, substitute water source investigations and evaluation methods and a modular expert disaster monitoring system are developed and strategies to prevent subsidence in soft and hard geologic stratums are designed. Finally using an effective, nationally integrated set of environment and soil data, the safety factor of slopes adjacent to major roads are increased and the value of remediate structures are assessed.

Climate change and precipitation, earthquake induced landslides and debris flows had become an important issue in Taiwan, the importance raised especially after the approval of Geology Act and Disaster Prevention and Protection Act. Our main task is to understand the relationships between multiple-hazards, in this status mainly focus on sediment related hazards. To fulfill the task, remote sensing interpretation, field investigation, susceptibility analysis and numerical simulation were the main tools. Our research results could provide the information for national land-use planning and disaster risk management in the future.

Our major task is to analysis how the large-scale multiple natural hazard (e.g. earthquake and extreme climate) impacts urban areas and critical infrastructures. According to the results of hazard analyses, we could build up the policy of prevention plans and loss assessment. Our research topics are related to hazard scenario simulation technology of severe earthquakes and floods, the development of creating natural hazard susceptibility maps, the techniques of three-dimensional geological models and so on. The expectation is to build a natural hazard evaluation model for urban area and critical infrastructure in order to provide the information for disaster prevention and to strengthen the resilience to natural hazards.