GEO Brasil - UNEP

Thus, the volume produced by a well
for 16 hours a day would be enough
to supply between 20 thousand and
50 thousand people, with a rate of 200
l/day per capita
needs to be operated, thus avoiding, the degradation of soil/ water binomial, as
a consequence of the accumulation excess in the upstream section The
“superficial encroachment of the inverted Roman type arch” is a kind of dam
whose function is to keep sediments and water flow However, this type of water
reception in the semi-arid Northeast has its application restricted to sectors
where there is a relative production of sediments transported by waters of
superficial drainage
27 The Quality of Underground Water
In general Underground water in Brazil has a quality that reflects the intensity of
recharges and the geological/environment through which it flows In the Brazilian
territory there is an abundant pluviometer, high temperatures during almost the
Figure 4 - U nderground w ater potentials in B razil
the state of the environment in Brazil
In the crystalline rock contexts with
thick alteration mantle, the specific
capacities vary between 1 and 5 m3/
hm-1 In other words, the exploited
flows with up to 50 meters of lowering
of WL of respective well, during 16
pumping hours/day, which would be
enough to supply contingents of up
to 10 thousand inhabitants
Just in the crystalline rock domain of
the semi-arid Northeast, the specific
capacities are inferior to 1 m3/hm-1
However, the production of 0,5 m3/h,
with lowering of the water level in the
well (NE) of 20 meters and operating
16 hours a day would be enough to
supply contingents of up to 1,500
people, with a rate of 100 l/day per
capita
Key:
Amazon Basin
1,300,000 km²
>10(m³/h)m
5-10(m³/h)m
1-5(m³/h)m