Triggered mainly by intensive rainfall or rainstorms during rainy season

tens or hundreds of landslides occur each year in Hong Kong. During one rainstorm

however

rainfall intensity is riot equal though out the storm covered area. The rainstorm center where the rainfall intensity is heaviest varies spatially and temporally during the process of one rainstorm. To analyze the relationship between landslide distribution and rainstorm center and its variation

the rainstorm occurred on May. 8

1992 was selected as an example. Aided by geographical information system

it calculated spatial distribution of the rainstorm centers at 30 minutes temporal interval. The distribution and other characteristics of landslide occurred during the rainstorm can be extracted from landslide database supplied by Geotechnical Engineering Office of Hong Kong. The landslide distribution and other features and rainstorm center for each 30 minutes can be presented at one geographical map. Based on those relationship maps

some conclusions were given as . landslides always distribute just at rainstorm center or at the marginal area of rainstorm center

temporally

landslides occur during the same 30 minutes interval or the coming 30 minutes one. The occurrence frequency of landslide is also connected with rainfall intensity that usually the more intensive rainfall

the high possibility of landslide occurrence.