Revista Estratégica vol.10 - Faap

tral region of the state before debouching into the Madeira River, Calama region,
municipality of Porto Velho. Its tributaries along the right margin are Riozinho,
Lourdes, São João and Tarumã Rivers. The left margin tributaries are the Luiz de
Albuquerque, Rolim de Moura, Ricardo Franco, Black, Jaru, Boa Vista and Urupá
Machadinho Rivers. Its main hydrographic accident, among the various existing
which hinder navigation, is the waterfall 02 de Novembro, located in the Machadinho
do Oeste municipality; all occur in valleys well inserted, except for a segment
of the Roosevelt River, in which a fluvial plain appears (RADAMBRASIL, 1978).
The sub basin of the Upper region of the Machado River is the second in area,
with 10696.8029 km2, behind the sub-basin of the Black River with a total of
11,037.1047 km2, but it is the first in perimeter with a total 809.00 km.
Regarding the stratigraphy of the area it was noted the presence of pebbles
and blocks of various rocks, joined by a mass of brown clay lithostratigraphic; this
region is still composed of chocolate color to green shales, fissile, micaceous, tiny
crystals of pyrite disseminated, interbedded arkoses, brown massive fine to medium
flakes of muscovite and clay minerals.
According to Radambrasil (1978), the physiography of this area is quite diversified
with hills and mountains that continue across the northern border. The coating
surfaces of the crystalline basement are dense forest with cluster of open forest
formations. The gently undulating areas in southwestern and northern portion
sport the Open Forest. To the southeast, a tabular surface stands to reach higher
altitudes, all in its mid-eastern half. It is, however, sometimes quite eroded in crests
as in hills, except in its most northern portion where its table tops, with more than
300 meters in altitude, include the mountain Quatorze de Abril. There is practically
an intercalation from south to north, between the coverage areas of the platform
and the Precambrian crystalline basement. As a consequence, there is a great diversification
on their forest cover (RADAMBRASIL, 1978).
Also, according to Radambrasil (1978), among the reliefs described, a surface
appears flattened due, perhaps, to the accumulation provoked by the Comemoração
River, which cuts it in half. They are areas of eutrophic Cambisol soil covered
by savanna areas and contact of Savannah / Forest areas. In a small segment of
the Roosevelt River, to the south, there is a narrow bent of alluvium that interpenetrates
in two tributaries of the right margin.
Procedures
Resources and procedures used for this study included surveys of databases
from the library of the Brazilian Association of Ceramics at the Library of the Society
of Mining Rondônia (CMR) also, monthly visits on site monthly during the
period of one year in 2006 were performed to identify the nuances of using fish
culture as a strategy for recovery of the degraded areas.
Innovation applied to the recovery of degraded areas..., Marcelo R. dos Anjos, Francisco A. de Andrade e Pamela M. R. Monte, p. 23-36
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