Shandal Geological Field Survey System · geologicalfieldsurvey.com
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Shandal analysis — for subscribers
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Site
Test rainfall against landslide thresholds
Pick the site and the period, then fetch hourly rainfall. Every storm is tested at durations from 1 hour to 10 days against the selected intensity–duration threshold.
1
Rainfall, accumulation and threshold exceedance
Bars: daily rain. Line: antecedent precipitation index. Lower panel: exceedance ratio, the largest I / I(threshold) over all durations ending at each hour. Values above 1 cross the threshold.
2
Intensity–duration plot
Maximum mean intensity reached at each duration during the period, against the published thresholds (log–log).