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International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B7. Istanbul 2004
Horizontal and vertical support, re-ambulation and restitution
performed in January and February 2000;
Cadastral actualisation accomplished from aero-
photogrammetric data of May 2002;
Level curves equidistance = 1 meter.
2.3 Water Supply System
The water supply system (WSS) of the District of Santo
Antonio de Lisboa is terminal of the Integrated System of
Florianópolis (ISF) and it is constituted by water impounding
from Pilóes and Cubatào rivers that run in the region of Santo
Amaro da Imperatriz. Before reaching the area of study these
rivers furnish water to four other regions, plus the continental
area of Florianópolis and to six districts of the insular region.
The Costa Norte System (CNS) furnishes a complementary
amount of water extracted from 22 artesian wells joining the
ISF in the vicinity of the area of study, where a retention valve
prevents water reflux from ISF and a macro meter allows daily
readings of the water volume that comes from the CNS (figure
3).
". Costa Norte
System
o "a
Santo Antonio: m
de Lisboa 5
^ [=] WATER MAIN
3 |o |MACRO METER
| WATER TANK
fie PN
KF +. \ Integrated System
Tor Florianopolis
Figure 3 — Schema of Water Supply System
District of Santo Antonio de Lisboa
The capacity to suffice the requirements of water by the system
were determined by the analysis of the following data: daily
measurements of the total pumped in the entrance of the District
of Santo Antonio de Lisboa in Cacupé (ISF); daily
measurements of total volume distributed in Santo Antonio
(CNS) and the daily total volume data pumped to Ponta do
Sambaqui (Ostras' street booster).
To determine the efficiency of the net in terms of pressure and
outflow, the research did not utilize technical details furnished
by the Operational Regional Sector of Florianópolis, due to
their precarious precision, the lack of cartographic base, and an
outline containing graphic errors.
Figure 4 — Aero-image of pilot area with approximate
superposition of its aero-photogrametric restitution.
Figure 4 shows in details the houses with water supply
delivered by the CASAN (Water and Sanitation Company) and
thanks to a booster with macro-meter localized in that region it
was possible to restrict to this region the area of research, as
representative of the global system.
The study included a survey of population data, with addresses,
individual categories, number of dwellers per residence and
possible seasonal increments, capacity of house particular
reservoirs and daily necessities, in order to attain autonomy of
water usage under circumstances of suspended provision by
CASAN.
Although the daily expenditure of water per capita might be
variable, the recommended allowance is situated between 100
I/inhabitant/day and 300 l/inhabitantday (WHO, 2003) A
group of authors: BRITO (1943), AZEVEDO NETO et al
(1973) and GARCEZ (1988) suggest values depicted in table |.
Food and ingestion 10
Ablutions 5
Clothes washing 20
Tableware washing 15
Bathing (10 minutes) 90
Toilet flushing (3 X) 30
House cleanliness 10
Total (liters/inhabitant/day) 180
Table 1 - Volume of Daily Water Expenditure per inhabitant.
Through a simulative program developed with the aid of an
Excel? Net Chart, each case was studied in accordance to daily
variations of pumping volume related to water demand
