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Abstract
The creeping Mam Tor landslide (North Derbyshire, UK) is sliding slowly downhill at up to 0.5 m per year. Annual measurements using conventional surveying techniques have shown that creep is exacerbated by periods of heavy rainfall, but to establish a detailed correlation between creep and groundwater levels requires spatially and temporally higher resolution monitoring. We have acquired three years of such data from wire creep meters, borehole piezometers and rainfall monitoring. These measurements showed that creep is strongly focused into the winter months and that it correlates well with groundwater levels. Summer grass and fern growth exerts a strong influence on rainfall infiltration, recycling much of the summer rainfall back to the atmosphere, and explaining the seasonal variability of creep motion.
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