Abstract
Recently earthquake have caused much damage to such agricultural facilities as canals, farm roads, and small earth dams for irrigation.Especially, small earth dam is an important facility due to its function of supply of irrigiration water.Recently disaster prevention of small earth dams are pointed out.Since the surroundings of small earth dams have been developed, the secondary damage (lives, public works) in lower basin may become serious if such earth dams fail.As the result of the Hanshin Great Earthquake of 1995, 1, 222relatively small earth dam used for irrigation suffered from damage.
To efficiently maintain a large number of earth dams for earthquake disaster prevention, it is necessary to create the data base system for earth dams.This paper describes the data base system of small earth dams for earthquake disaster reduction.
The data base contains the following information:
(1) Structural information (location, height, storage capacity, dam cross section, present embankmand status, etc.) .
(2) Visual information of dam data (Location map, photo, drawing) .
(3) Information of local topology, geology, administrative borders, etc. (Digital national land information) .
(4) Published data of active faults of Japan, and rain intensity of local points (Amedas data) . (5) Information of disaster caused by the past natural disaster.
