?Lowland? denotes regions of low elevation, which are particularly vulnerable to climatic and environmental changes. For example, global warming, which appears to be causing a rise in sea level, must ultimately affect the safety of coastal dikes and other coastal infrastructures, as well as threaten the water and ecological systems in lowland areas. Lowland regions are also particularly susceptible to natural disasters. Action is now required for the development of new technologies to protect and develop lowland areas and to solve the environmental problems currently being faced in these regions. To achieve this aim, it will be necessary to draw on and to merge several disciplines, such as geotechnical engineering, water resources, city planning, coastal engineering and geographical information system etc.