ESECAFLOR Experiment consists on a simulation of a period of prolonged drought in
the forest, to evaluate the impact of dries in the water flows, in an Amazonian tropical
forest, investigating the influence of the water exclusion in the ground, on forest cycle,
and the alterations provoked by the event, simulating the El Niño phenomenon, that
affects the eastern part of the Amazônia, in the reduction of rains. Actually, the
experiment simulates what occurs in the forest, in case of a prolonged El Niño. In the
physical structure, it consists of an area of one hectare (parcel B) covered by plastic
plates, making it difficult the entrance of the rain water, around 90%. An another
parcel, of one hectare (Parcel A) serving of reference, also receiving normally the rain
water. These parcels are delimited by trenches, whose depth varies from 50 to 150 cm
the maintenance of plastic is naturally made, because of fall of twigs, trees and of the
instruments, as much in the surface, as in the layers below of the ground. The ground
temperature and humidity data, from the years of 2006 and 2007 had been studied in
its variation, of the two parcels. The results show that the parcel A, in terms of ground
humidity, presented greater variation, when comparative with parcel B, and this kept
constant in the studied levels. Already the ground temperature in parcel B always was
above of the ground temperature of parcel A, in all the studied levels, because this
parcel was presented in hidric stress.
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