FLOODS IN MUNICIPALITY OF AMADORA Emanuel Crucho | Geographic Information Division Luís Carvalho | Civil Protection Municipal Service Universidade Nova

FLOODS IN MUNICIPALITY OF AMADORA

Emanuel Crucho | Geographic Information DivisionLuís Carvalho | Civil Protection Municipal Service

Universidade Nova de LisboaLisbon, January 21th | 2014

FLOOD CBA SEMINAR | LISBON, JANUARY 21th | 2014


1. INDEX

1. FLOODS IN MUNICIPALITY OF AMADORA1.1. HYDROGRAPHIC NETWORK

1.2. HYDROGRAPHIC NETWORK SUSCEPTIBILITY1.3. MORPHOLOGIC CAUSES OF FLOODS IN AMADORA

1.4. TYPICAL MORPHOLOGIC CAUSES AND HAZARD1.5. EXAMPLE

1.6. RESTART SPOTS1.7. FLOOD HAZARD SPOTS

2. FLOODS – HISTORIC LOSS DATA2.1. LAST DECADE

2.2. LAST DECADE (YEAR)2.3. LAST DECADE (MONTH)

2.4. CRITICAL AREAS2.5. PREVENTION

3. FINAL NOTES


1. FLOODS IN MUNICIPALITY OF AMADORA1.1. HYDROGRAPHIC NETWORK


BASIN Area (Km2) Area (%)

Rio da Costa 4,7 19,8

Rio Jamor 8 33,6

Ribeira de Alcântara 8,6 36,1

Ribeira de Algés 2,5 10,5

Municipality Area 23,8 100

HYDROGRAPHIC NETWORK : - EXTENSION - 46,8 KM

- DRAINAGE DENSITY - LOW ( 2KM/KM2)- STREAM ORIENTATION – N-S OR NW-SE


1. FLOODS IN MUNICIPALITY OF AMADORA1.2. HYDROGRAPHIC NETWORK SUSCEPTIBILITY


77%

22%1%

HYDROGRAPHIC NETWORK SUS-CEPTIBILITY:

LOW MODERATE HIGH VERY HIGH

# RESULTS OF AN MULTI-CRITERIA ANALYSIS. CONSIDERED: FLOW ACCUMULATION, SLOPE AND PERMEABILITY (LITHOLOGY AND SOIL COVERAGE)


1. FLOODS IN MUNICIPALITY OF AMADORA1.3. MORPHOLOGIC CAUSES OF FLOODS IN AMADORA


MORFOLOGIC CAUSES CONSIDERED: A - MATCH WITH HYDROGRAPHIC NETWORKB - LOCATION IN SQUARE/ROTUNDA – REDIRECTION OF FLOWC - LOCATION IN SQUARE/ROTUNDA – AREA OF ACCUMULATIOND - LOCATION IN STREET INTERCEPTION – REDIRECTION OF FLOWE - LOCATION IN A ACCUMULATIVE STREETF - ARTIFICIAL BARRIER TO NATURAL FLOWG - ARTIFICIAL LOWERED AREASH - UNDETECTED CAUSES

STUDY THE MORPHOLOGIC CAUSES OF FLOODS IN AMADORA:

54 SPOTS WITH MORE THAN 1 OCCURRENCE (2000-10)8 MORPHOLOGIC CAUSES CONSIDERED


1. FLOODS IN MUNICIPALITY OF AMADORA1.4. TYPICAL MORPHOLOGIC CAUSES AND HAZARD


Cause/Hazard Very High High Moderate Low Total

A 2 3 5B 1 1C 1 1 1 3D 2 3 4 5 14E 3 8 10 16 37F 4 6 12 22G 2 2 4H 1 1 2

Total 6 18 24 40 88

TYPICAL COMBINATION

D E (2x) E (3x) E (7x)EF (9x)

EF (13x) e E (14x)

ANUAL FREQUENCY (2000-10)

>2,0 <=2 e >1 <=1 a =>0,5 <0,5TYPICAL MORPHOLOGIC CAUSES: A - MATCH WITH HYDROGRAPHIC NETWORK

D - LOCATION IN STREET INTERCEPTION – REDIRECTION OF FLOW

E - LOCATION IN A ACCUMULATIVE STREET

F - ARTIFICIAL BARRIER TO NATURAL FLOW

Summary:◦ TYPICAL CAUSE: E ; E-F◦ LOW AND MODERATE HAZARD SPOTS MATCH WITH: E ; EF◦ VERY HIGH HAZARD SPOTS MATCH WITH: D-E◦ SPOTS IN HYDROGRAPHIC NETWORK MATCH WITH: MODERATE AND LOW HAZARD


1. FLOODS IN MUNICIPALITY OF AMADORA1.5. EXAMPLE


EX: SPOT Nº 2 – 2,5 FLOODS/YEAR

D - LOCATION IN STREET INTERCEPTION – REDIRECTION OF FLOW

E - LOCATION IN A ACCUMULATIVE STREET

VERY HIGH HAZARD SPOT

Avenida António Feijó


1. FLOODS IN MUNICIPALITY OF AMADORA1.5. EXAMPLE


EX: SPOT Nº 5 – 1,9 FLOODS/YEAR

E - LOCATION IN A ACCUMULATIVE STREETF - ARTIFICIAL BARRIER TO NATURAL FLOWG - ARTIFICIAL LOWERED AREAS HIGH HAZARD SPOT

Rua António Aleixo

Avenida Dom Pedro V


1. FLOODS IN MUNICIPALITY OF AMADORA1.6. RESTART SPOTS


EXAMPLE OF “RESTART SPOTS”

SPOTFLOODS

2000-05 2006-10 TOTAL

21 0 9 9

50 0 3 3

PROBLEM: ACCUMULATION OF SEDIMENTS AND MATERIAL FROM A ROAD

CONSTRUTION SITE (JUN 2008-ABR 11)


1. FLOODS IN MUNICIPALITY OF AMADORA1.7. FLOOD HAZARD SPOTS


477 OCCURENCES (2000-10)IN 54 SPOTS

4 SPOTS – VERY HIGH HAZARD11 SPOTS – HIGH HAZARD18 SPOTS – MODERATE HAZARD21 SPOTS – LOW HAZARD

ANUAL FREQUENCY

>2,0

<=2 e >1

<=1 a =>0,5

<0,5

PARISH WITH MORE SPOTS DENSITY:ÁGUAS LIVRES (4/KM2/YEAR)

2. FLOODS – HISTORIC LOSS DATA2.1. LAST DECADE

IN THE LAST DECADE, THE MUNICIPALITY REGISTERED ABOUT 1686 URBAN FLOODS. URBAN FLOODS ARE ONE OF THE EVENTS WHICH CAUSES MORE LOSSES: DESTRUCTION OF PROPERTY,

ECONOMIC DAMAGE, DISRUPTION OF SERVICES.



YEARS WITH MORE TOTAL PRECIPITATION: (1) 2000 (2) 2010 (3) 2001;

YEARS WITH MORE FLOODING EVENTS: (1) 2000 (2) 2003 (3) 2006;

YEARS WITH LESS TOTAL PRECIPITATION: (1) 2005 (2) 2004 (3) 2007;

YEARS WITH FEWER FLOODING EVENTS: (1) 2004 (2) 2005 (3) 2007;

Not always the trend is: MORE PRECIPITATION = MORE FLOODS



2. FLOODS – HISTORIC LOSS DATA2.2. LAST DECADE (YEAR)

MONTHS WITH THE HIGHEST TOTAL PRECIPITATION:

(1) DECEMBER (2) OCTOBER (3) NOVEMBER; MONTHS WITH MORE FLOODING

EVENTS: (1) OCTOBER (2) NOVEMBER (3) DECEMBER;

MONTHS WITH LESS TOTAL PRECIPITATION:

(1) JULY (2) AUGUST (3) JUNE; MONTHS WITH FEWER FLOODING

EVENTS: (1) MAY (2) JULY (3) JUNE.

OCTOBER, NOVEMBER AND DECEMBER, ARE THE MONTHS WITH MORE PRECIPITATION AND MORE OCCURRENCES



2. FLOODS – HISTORIC LOSS DATA2.3. LAST DECADE (MONTH)

THE FREQUENCY AND OCCURRENCE OF URBAN FLOODS ARE MAINLY DUE TO HEAVY RAINFALL AND HIGH URBANIZATION IN THE

BASINS OF THE MUNICIPALITY.

FLOODS “HOT-SPOTS”•IC 19 Acesso Hospital Amadora-Sintra (30 urban floods).•Rua Elias Garcia + Avenida Dom Nuno Alvares Pereira.•Estrada da Falagueira.•Avenida Dom Pedro V.•Rua Correia Teles.•Rua Capitães de abril.•Avenida Cardoso Lopes + Avenida Combatentes da Grande Guerra.•Avenida da República.•Avenida Quinta Grande.



2. FLOODS – HISTORIC LOSS DATA2.4. CRITICAL AREAS

Avenida Dom Pedro V (Damaia)




Rotunda IC19 Hospital (Venteira)



Intervention and resizing of the drainage network

(Water and Sewage Service – SMAS)




PREVENTION COMMITMENT : - DISSEMINATION OF PREVENTATIVE MEASURES (CIVIL PROTECTION);

- URBAN DRAINAGE SYSTEM RESIZING (SMAS); - TECHNICAL STUDIES (DIG);

- URBAN CLEANING (CIVIL PROTECTION AND THE LOCAL COUNCILS);- WEATHER AND CIVIL PROTECTION WARNING SYSTEM AVAILABLE TO

THE COMMUNITY (CIVIL PROTECTION);

2. FLOODS – HISTORIC LOSS DATA2.5. PREVENTION



3. FINAL NOTES

-LOW OR MODERATE HYDROGRAPHIC NETWORK SUSCEPTIBILITY TO FLOODS;

- THE LOW PERMEABILITY OF THE SOIL AND

THE HIGH DENSITY OF CONSTRUTION INCREASED THE FREQUENCY OF FLOODS IN

AMADORA;

- IT WOULD BE IMPORTANT TO HAVE DIRECT AND INDIRECT COSTS OF FLOODS;

- THERE IS A CONSIDERABLE EFFORT TO

IMPROVE PREVENTIVE MEASURES;

- TECHNICAL STUDIES HAVE BEEN IMPORTANT TO IMPROVE KNOWLEDGE

ABOUT FLOODING


Emanuel Crucho | Geographic Information DivisionLuís Carvalho | Civil Protection Municipal Service

Universidade Nova de LisboaLisbon, January 21th | 2014

Documents

FLOODS IN MUNICIPALITY OF AMADORA Emanuel Crucho | Geographic Information Division Luís Carvalho | Civil Protection Municipal Service Universidade Nova