期刊
ENVIRONMENTAL GEOLOGY
卷 41, 期 3-4, 页码 384-389出版社
SPRINGER-VERLAG
DOI: 10.1007/s002540100403
关键词
Erica arborea L.; fog precipitation; Madeira Island; standard fog collector
An important aspect of the Madeira Island's climate is its persistent nebulous covering mainly of orographic origin, which normally exists between the 600-800- to 1,600-m altitude. The object of this study is to quantify the amount of water that can be gathered by direct interception from clouds. The first results at the end of 2 years were higher than expected. The daily rates of the 'standard fog collector' ranged between 6.0 to 21.3 l/m(2) of vertical collecting surface. The water collected by the rain gauges beneath Erica arborea L., ranged between 33.3 to 56.4 mm of water per day (l/m(2) per day). Depending on wind direction and speed, which is normally north-east, the highest fog water production can be 250 mm/day. Fog drip under the vegetation was three and a half times greater than the annual precipitation.
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