Natural disaster in coastal area is occurred mainly by sea origination. And Gangwon Province has beach erosion and sea inundation as typical pattern. Disaster factors occurred in the east coast of Gangwon are the aggravation of the meteorological disaster inducement of tsunami and typhoon and sea level arising. Another causes are in geographic and geo- morphic factors such as the adjacency of the earthquake zone and the location of the typhoon movement course. Meanwhile, the disaster potential is increased by the population and property concentrating 37% of Gangwon inhabit- ants in 6 coastal local county.
The method of disaster reduction based on such the conditions of disaster occurrence needs ① to avoid the disaster by strengthening of the control and management in using the coastal land ② drive the centralized coastal impro- vement ③ increase the tolerance and get the sustainability by maintain the natural restoration. ④ protect through the promote by the coastal disaster control and monitering ⑤ increase the efficiency by the connection of the coastal management works of the public field