Pagina 1© SENER Ingeniería y Sistemas S.A. 2009

DISEÑO DE SISTEMAS DE LAMINACIÓN DE AGUAS PLUVIALES

Juan JosJuan Joséé de la Torre de la Torre SuSuñéñé

SENER, INGENIERSENER, INGENIERÍÍA Y SISTEMAS, S.A.A Y SISTEMAS, S.A.

© SENER Grupo de Ingeniería, S.A. – Getxo, 2009

Áreas de Negocio Unidades Estratégicas de Negocio Área de Industria Aeroespacial Área de Energía y Medio AmbienteÁrea de Ingeniería

GRUPO – CIFRAS PROVISIONALES 2008

GRUPOGrupo de Ingeniería, S.A.

PROPIEDAD100 % PRIVADA

VALORES DISTINTIVOSINNOVACIÓN

CALIDAD

INDEPENDENCIA

VENTAS CONSOLIDADAS 921 M€

BDI ATRIBUIDO 47,4 M€

PERSONAS 5.735

VENTAS FUERA ESPAÑA 67 %

© SENER Grupo de Ingeniería, S.A. – Getxo, 2009

Áreas de Negocio Unidades Estratégicas de Negocio Área de Industria Aeroespacial Área de Energía y Medio AmbienteÁrea de Ingeniería

SENER INGENIERÍA Y SISTEMAS – INSTALACIONES

MadridVizcaya Barcelona Valencia

Tres CantosLas Arenas

Lisboa Buenos Aires

Laboratorio deelectrónica Salas blancas

Centro de integración y ensayos

ÁREA DE INGENIERÍAIngeniería y Sistemas S.A.

México DF Varsovia

Control y Ensayo de Vibraciones

Okayama

Sevilla

San FranciscoArgel

2-2

Northern Virginia BMP Handbook 11/6/92

In the Northern Virginia region, the

greatest threats posed by non-point

source pollution are excess nutrients,

particularly phosphorus, which is the

controlling pollutant for eutrophic con-

ditions in fresh water environments.

As demonstrated in Figure 2-2, nutri-

ents and sediments account for ap-

proximately 80 percent of all non-point

source pollution to the nation's lakes.

Some common sources of phospho-

rus include weathering and solution of

phosphate materials, atmospheric

deposition, groundwater, agricultural

and urban runoff, domestic and industrial sewage, septic systems, and waterfowl waste.

Excessive phosphorus loadings are of great concern to local water systems, such as the

Occoquan Reservoir and the Potomac River, because they result in eutrophication which

Figure 2-2:Primary Types of Non-Point

Source Pollution in Lakesin the United States

(Source: USDA, 1991)

➤D

ISC

HA

RG

E

TIME

Figure 2-1: Pre and Post-DevelopmentStream Hydrology

(Adapted from DeGroot, 1982)

➤

Post-DevelopmentStream Hydrology

Pre-DevelopmentStream Hydrology

Nutrients58%

22%

4%

4%

3%

3%3%

2%

1%

Sediment

PhysicalHabitatAlteration

Acidity

Oxygen Demand

Toxics

SalinityPathogens

Pesticides

First Flush Phenomenon Characterization

Prepared for

Prepared for:

California Department of Transportation Division of Environmental Analysis

1120 N Street Sacramento, CA 95814

CTSW-RT-05-73-02.6

Prepared by:

Michael K. Stenstrom

Department of Civil and Environmental Engineering University of California, Los Angeles

Masoud Kayhanian

Center for Environmental and Water Resources Engineering Department of Civil and Environmental Engineering

University of California, Davis

August 2005

7

Fognature: schemi e dimensionamento - Prof. G. Becciu

Tempo

Pioggia

PortateConcentrazioni

Ietogramma

Idrogramma

Pollutogramma

Controllo piene

Controllo dell’inquinamento

Tempo

Dove intervenire per ridurre lDove intervenire per ridurre l’’impatto dei deflussi meteoriciimpatto dei deflussi meteorici

C-17

DESCRIPTIONConstructed wetlands and multiple pond systems treat runoff through adsorption, plantuptake, filtration, volatilization, precipitation, and microbial decomposition. They aredesigned to simulate the water quality improvement functions of natural wetlands to treatand contain surface water runoff pollutants and decrease loadings.

SELECTION CRITERIA• Moderate to large drainage area.• Shallow surface water table.• Optimal water depth is approximately 6 inches.• Poorly drained organic soils.

LIMITATIONS• Potential augmentation of water flows.• Seasonal variability of plant growth.• Potential breading grounds for insects and undesirable odors.• Maintenance is required for efficiency.• Potential increase of thermal discharge, oxygen demand, and net nutrient loading.

DESIGN AND SIZING CONSIDERATIONS• An area consisting of at least 2 to 3 percent of the total contributing watershed’s area will

be needed.• Multiple pond systems potentially provide much higher levels of treatment.

Targeted PollutantsSuspended SedimentsTotal PhosphorusTotal NitrogenHeavy MetalsChemical Oxygen Demanding SubstancesTrace Metals

Implementation Requirements

Capital Costs

O&M Costs

Maintenance

Training

High Low

Structural BMP Fact SheetSFWMD-BMP-DS-3 - Detention Systems - Constructed Wetlands

NONSTRUCTURAL URBAN BMP HANDBOOK

5-44

factors will affect costs such as decisions regard-ing vegetative harvesting to prevent nutrient re-release.

Longevity – Factors influencing the longevityof created wetlands will primarily be the ability toregulate water depths, reinforcement of plantings,and selection of an experienced wetland consult-ant and/or contractor for design. If sediment fore-bays are used, this enhancement will also increasethe life span of the BMP.

Environmental Concerns – Stormwater wet-lands can result in increased temperatures down-stream as a result of their shallow nature. Place-ment of trees to shade shallow water areas canmitigate this to some extent. Also, there may bepossible takeover by invasive nuisance plants (e.g.loosestrife, cattails, and phragmites). Finally, bac-terial contamination may result if waterfowl popu-lations become very dense.

Source: MWCOG, Design of StormwaterWetland Systems: 1992.

FIGURE 5.2.4Schematic Design of an EnhancedShallow Marsh System

2-2

Northern Virginia BMP Handbook 11/6/92

In the Northern Virginia region, the

greatest threats posed by non-point

source pollution are excess nutrients,

particularly phosphorus, which is the

controlling pollutant for eutrophic con-

ditions in fresh water environments.

As demonstrated in Figure 2-2, nutri-

ents and sediments account for ap-

proximately 80 percent of all non-point

source pollution to the nation's lakes.

Some common sources of phospho-

rus include weathering and solution of

phosphate materials, atmospheric

deposition, groundwater, agricultural

and urban runoff, domestic and industrial sewage, septic systems, and waterfowl waste.

Excessive phosphorus loadings are of great concern to local water systems, such as the

Occoquan Reservoir and the Potomac River, because they result in eutrophication which

Figure 2-2:Primary Types of Non-Point

Source Pollution in Lakesin the United States

(Source: USDA, 1991)

➤D

ISC

HA

RG

E

TIME

Figure 2-1: Pre and Post-DevelopmentStream Hydrology

(Adapted from DeGroot, 1982)

➤

Post-DevelopmentStream Hydrology

Pre-DevelopmentStream Hydrology

Nutrients58%

22%

4%

4%

3%

3%3%

2%

1%

Sediment

PhysicalHabitatAlteration

Acidity

Oxygen Demand

Toxics

SalinityPathogens

Pesticides

5-19

Northern Virginia BMP Handbook 11/6/92

B) Principles of Mitigating Water Quality Impacts

It is imperative that suspended sediment be removed from runoff water before it enters the

infiltration trench storage chamber. Experience has shown that clogging by sediment has

been the principle cause of past failure of these facilities. Keeping this design requirement

in mind, one can view the pollution removal system of an infiltration trench as two separate

mechanisms. The sediment control system needed to maintain the function of the trench

removes those pollutants associated with suspended solids. These include adsorbed

phosphorus, certain heavy metals, and some exchangeable ions. Upon infiltration into the

soil, the water enters an environment where several chemical and biological processes

attenuate the levels of an array of pollutant species. Of principal interest is the ability of most

soils to irreversibly fix large amounts of soluble orthophosphate by chemical precipitation

and by surface adsorption to soil minerals. Infiltration trenches located in a landscape

position that is hydrologically connected to vegetated, poorly drained soils may have the

singular ability to remove nitrate nitrogen (NO3) through denitrification to nitrogen gas (N2).

Figure 5-7: Infiltration Trench with Concentrated Input andAugmented Pipe Storage

(Source: Fairfax County Soils Office, 1991)

Two PerforatedOverflow CollectionLines

BMP WaterQuality Volume

StormwaterDetention Volume

Bottom Sand Filter

SodFilter Gravel

Three CorrugatedMetal PerforatedPipes

Geotextile FilterFabric (Mirafi 700Xor Equivalent)

SedimentSediment

Aggregate

Sediment

15

Fognature: schemi e dimensionamento - Prof. G. Becciu

Sistemi di drenaggio urbanoSistemi di drenaggio urbano

infiltrazionese compatibile

infiltrazionese compatibile

Vasca di prima pioggia

Vasca di prima pioggia e vasca volano

Sistema separato “perfetto” e senza inquinamento delle superfici (non necessità di vasche di prima pioggia)

Sistema misto

Vasca volano

7

Fognature: controllo degli scarichi - Prof. Gianfranco Becciu

Vasche in sito - 1

livello maxsfioratore

Pozzetto di ispezioneventilazione

Tubo d’uscita

Tubo d’entrata

Regolatore di flusso

23

CELL # 2

SLOPE = 2 %

SU

MP

SU

MP

CELL # 1

CELL # 2

CELL # 1

SLOPE = 2 %

SLOPE = 2 %

SLOPE = 2 %

"A"

"A"

"B"

"B"

600

mm

Dia

met

er S

ewer

Influent Sewer

Location of floatele. 175.75

Loca

tion

of fl

oat

ele.

175

.75

Loca

tion

of fl

oat

ele.

173

.65

Loca

tion

of fl

oat

ele.

173

.25

1650

500

2500

2000

43000

500

500

3985

0

8120

0

3985

0

1650 mm Diameter

ALL

DIM

EN

SIO

NS

SH

OW

N A

RE

IN m

m

Figure 6-11. Sarnia - CSO Storage Tank, Plan View

35

Figure 6-18. 14th Street Pumping Station - Tanks B1, B2 and B3

Figure 6-19. 14th Street Pumping Station - Tank B4

20

Plan View

2 %

2 %

2 %

2 %

2 %

2 %

2 %

3.7 %

FlushwaterSupply Pipe

3.7 %

Training Wall

Sump Sump

Flushing Gate (typ.)

Storage VolumeAdjustment Pipe

FlushwaterStorage Area

Section "A"

"A""A"

4.4 4.1 3.8 3.8 3.8 4.1 4.4

30.5

Figure 6-9. Cheboygan - Circular CSO Storage Tank, Plan and Section Views

21

Figure 6-10. Cheboygan - Photograhs of Circular CSO Storage Tank

8

Fognature: controllo degli scarichi - Prof. Gianfranco Becciu

Vasche in sito - 2

45

Effect of site controls(detention ponds)

Time

Flow Developed conditionswithout controls

Pre-developmentconditions

Developed conditionswith controls

44

Detention Ponds

Courtesy of Peter Shanahan. Used with permission.

16b_v2 Plan: plan 16b_v2 5/21/2009

Legend

WS 10FEB1999 0310

Ground

Bank Sta

Ground

Pagina 1© SENER Ingeniería y Sistemas S.A. 2009

FIN

MUCHAS GRACIAS POR SU ATENCIMUCHAS GRACIAS POR SU ATENCIÓÓNN