Mean annual rainfall Population density

Reference: Schedules of water resources, ANA, 2005 Reference : IBGE, 2007

Inhabitants per

square kilometer

Rainfall (mm)

Situation of the

main parts of the

Brazilian rivers in

relation to

demand /water

availability.

Tietê River Basin:

"Hydric Stress" due to

the high demand for

public water supply

Relationship between demand

and the Water availability (%)

Excellent Comfortable Alert level Critical Very critical

Semi-arid region

basins: “Hydric

Stress" due to

the scarcity of

water resources

Sub-basins of the Uruguay and South

Atlantic River Basins : “Hydric Stress"

due to the very high water demand for

agricultural irrigation

1 2 3 Predominantly critical and very critical river basins

Reference: adapted from “Situation of water resources in Brazil" (ANA,2009)

1

2

3

Percentage distribution of the São Paulo State population

Elaboration: Geographical Information

Coordination – CIG, Emplasa.

Reference: SMA/CPLA/GTLPM

(*) The difference of 0,55 is due to the references

used: FIBGE-CENSO 1991 (and respective errata)

and agregate data by CERH, according to Dec.

36.787/93 and Dec. 36.455/94

Baixada Santista

(south coast)

References A. Simonsen, Roberto C. História Econômica do brasil (1500/1820) - (1978). Apresenta as estimativas atribuídas a Contreiras Rodrigues, Thomas Ewbank e Adriano Balbi, p.271; B. Furtado, Celso. Formação Econômica do Brasil (1959), p.93; C. Site IBGE:<http://www.ibge.gov.br/home/estatistica/populacao/censohistorico/1550_1870.shtm > D. Site IBGE:< http://www.ibge.gov.br/home/estatistica/populacao/censo2010/tabelas_pdf/Brasil_tab_1_4. E. Site IBGE:<http://www.ibge.gov.br/home/estatistica/populacao/projecao_da_populacao/2008/default.shtm>

The Evolution of the Brazilian population (inhabitants)

Census Data

Projection

Year of Census

Po

pu

lati

on

Reference: A. Site IBGE:< http://www.ibge.gov.br/home/estatistica/populacao/censo2010/tabelas_pdf/Brasil_tab_1_4.pdf >

B. Site SEADE: <http://www.seade.sp.gov.br/produtos/projpop/index.php>

Evolution of the population of the State of São Paulo (inhabitants)

Census Data

Projection

Year of Census

Po

pu

lati

on

Reference: A. Site PMSP:< http://sempla.prefeitura.sp.gov.br/historico/tabelas/pop_brasil.php> B. Site IBGE:<http://www.ibge.gov.br/home/estatistica/populacao/censo2010/tabelas_pdf/Sao_paulo.pdf> C. Site SEADE: <http://www.seade.sp.gov.br/produtos/projpop/index.php>

Evolution of the population of the Metropolitan Region of

São Paulo (inhabitants)

Census Data

Projection

Year of Census

Po

pu

lati

on

Evolution of the urban and Rural Population in Brazil

(inhabitants) 1940-2000

Reference; Site IBGE:< http://www.ibge.gov.br/

São Paulo Metropolitan Region (SPMR)

Annual rates of population growth 2000-2005

SPMR WATER SOURCES REGIONS

1,6%

4,0%

The trend of peripheral growth is maintained until 2025

Land area: 8,500 km2

Urbanized area: 2,139 km2

Population: 20,309. 647hab

“Social Centrifuge" and water sources regions occupations

Urban Sprawl Evolution – 1905

RADIUS

Evolução da Mancha Urbana - 1954

Urban Sprawl Evolution – 1954

RADIUS

Urban Sprawl Evolution – 1973

RADIUS

Urban Sprawl Evolution – 1985

RADIUS

Urban Sprawl Evolution – 1985 and 2005

RADIUS

Issues in water sources regions

Illegal occupation

Raw sewage release

Water sources regions Occupancy in valley-bottoms

Urban water sources

Disordered occupancy

Billings

Reservoir

Billings Reservoir Region

Guarapiranga

Reservoir

Guarapiranga Reservoir Region

Metropolitan ring road

Southern Section of the Mario Covas Beltway

Southern Section of the Mario Covas Beltway construction details

Bridge over Billings Reservoir

Constructive details of the occupation in water sources regions

Available at: <http://www.angularaerofoto.com.br/index.php#mi=2&pt=1&pi=10000&s=11&p=4&a=0&at=0>

Aerial photo of the Beltway: Aerial view of a section of the

Mario Covas Beltway in the municipality of Santo André – SP

Photografy: Pedro Calado

The routhe of the highway passes throught the Billings and Guarapiranga

water sources regions

Eutrophication

Barrier to control the macrophytes dispersion in the reservoir

Operation problems

macrophytes

Water

catchment at

Rio Grande

water

treatment

plant

Water

source

Quality

Algae bloom

The water management and the pollution control are mechanisms to increase the water availability to more rigorous uses, as public

water supply

The water availability, to comply with its purposes, depends on the integration of

the use and the impact management

The new paradigm

Water Resources Management

System

National Environmental

System

Management Water Quality

Reference: Adaptaed from Monica Porto – EP/USP

• Regulation of the use and occupation of the soil mainly in urban water

sources areas

• Urban Development Policy, in order to keep the people in the countryside

• Integrated and Multi-institutional Planning

• Environmental Agencies

• Public Authorities

• Public Prosecutor

• Prefectures

• Sanitation Company

.

.

.

Action on the causes and not on the effects

Wanderley da Silva Paganini wpaganini@sabesp.com.br

www.sabesp.com.br

Thank you