MAR systems in Barcelona: A multi-system to improve water availability in the aquifer
Pere Verger Can Serra, Cornellà de Llobregat 2nd October, 2014 INDEX
1. INTRODUCTION
2. ARTIFICIAL RECHARGE IN THE BARCELONA AREA
3. WATER REUSE
2 HYDROGRAPHIC SYSTEMS MANAGEMENT IN CATALONIA
Ter - Llobregat System
3 TER-LLOBREGAT SYSTEM
Water reservoirs capacity
Llobregat 214 hm3 Ter 398 hm3
LA BAELLS 109 hm3 SAU 3 165 hm3 Ter - Llobregat 612 hm LA LLOSA DEL C. 80 hm3 Yearly demand (hm3) SUSQUEDA 233 hm3 SANT PONÇ Water demand: 370 24 hm3
Irrigation: 170 ETAP ETAP ABRERA CARDEDEU
Environmental flow: 100 ETAP ST. ACUÍFERO J. DESPÍ BESÓS Total demand 640 hm3 ACUÍFERO LLOBREGAT IDAM Barcelona
Nº of supplied inhabitants 2.868.700 Nº of supplied municipalities 24 Distribution network length 4.614 km Daily average consumption 530.000 m3 4 EVOLUTION OF THE DAMMED RESOURCES 1982-2013
5 DROUGHT AND FLOODS IN CATALONIA (2007/2008)
Sau reservoir on the Ter river 6 DWTP Sant Joan Despí: RIVER INTAKE
2000
1999
7 DRINKING WATER RESOURCES IN BARCELONA
Surface River water (TER)
Surface River water Groundwater (LLOBREGAT) (LLOBERGAT)
Groundwater (BESOS)
8 INDEX
1. INTRODUCTION
2. ARTIFICIAL RECHARGE IN THE BARCELONA AREA
3. WATER REUSE
9 ADVANTATGES OF MANAGED AQUIFER RECHARGE
BENEFITS FROM THE POINT OF VIEW OF DWTP OPERATORS: - Increase water resources (storage in the aquifer) - Improve water quality - Hydraulic barrier against seawater intrusion
10 ARTIFICIAL RECHARGE IN THE BAIX LLOBREGAT AREA
Scarification Castellbisbal Ponds
Barcelona
Deep Recharge in Cornellà (ASR) St. Vicenç dels Horts Ponds
Sta. Coloma de Cervelló Ponds
Hydraulic Barrier
11 LOW VALLEY AND DELTA LLOBREGAT AQUIFERS
CONFINED FREE AQUIFER AQUIFER
MARTORELL PALLEJÀ MOLINS DE REI Mediterranean CORNELLÀ MARTORELL SANT FELIU EL PRAT sea CASTELLBISBAL
SANT ANDREU EL PAPIOL DE LA BARCA LOW VALLEY
PALLEJÀ AQUIFER MOLINS DE REI
SANT VICENÇ SANT FELIU DELS HORTS DE LLOBREGAT 2 SANT JOAN DESPÍ 110 km SANTA COLOMA DE CERVELLÓ CORNELLÀDE LLOBREGAT Surface: 114 hm3 SANT BOI DE DEL’HOSPITALET LLOBREGAT Capacity: LLOBREGAT DE LLOBREGAT VILADECANS Length of free aquifer: 11 000 m EL PRAT DE GAVÀ LLOBREGATEL PRAT DE LLOBREGAT Minimum width of free aquifer: 250 m CASTELLDEFELS Maximum width of free aquifer: 2 100 m
DELTA AQUIFER Length of confined aquifer: 9 000 m
Maximum width of confined aquifer: 17 000 m
12 Aigües de Barcelona: MAR activities
Castellbisbal Martorell
Santa Andreu SURFACE RECHARGE de la Barca (scarification of Molins de Rei Pallejá the river bed) Sant Feliu de Llobregat Sant Joan Despí Cornella de Llobregat Sant Vicenç
L’Hospitalet
Sant Boi de Llobregat
El Prat de Llobregat
Viladecans Llobregat river Gava
Castelldefels Mediterranean sea RECHARGE AT DEPTH 13 ARTIFICIAL RECHARGE IN SURFACE
Martorell
Castellbisbal Sant Cugat
Sant Andreu de la Barca El Papiol Valldoreix
Pallejà Molins de Rei
Sant Feliu Cervelló Sant Just Esplugues
Sant Vic enç Barcelona Vallirana L'Hospitalet
Sant Joan Despí
Sant Cli ment
Cornellà Sant Boi El Prat de Llobregat
Viladecans Rio Llobregat
Gavà
Castelldefels Mar Mediterráneo
14 QUALITY STANDARDS & COSTS
Conditions: Flow: between 10 and 35 m3/s Turbidity: < 100 NTU Ammonia: < 1 mg/l Chloride: < 350 mg/l
Estimated recharge capacity: 40 000 m3/day (1965)
2.000- 6.800m3/day (ESCAR Project 2012)
Cost of recharged water: 0,03 €/m3
15 AQUIFER RECHARGE IN DEPTH
RECHARGINGRECARGA LIMPIEZACLEANING BOMBEOPUMPING Martorell
Castellbisbal Sant Cugat
Sant Andreu de la Barca Valldoreix El Papiol 6 5 4 3 6 5 4 3 6 5 4 3
Depósito Desguace Depósito
2 1 2 2 1 Pallejà Molins de Rei 1 1 Válvula de impulsión
2 Válvula antirretorno Sant Feliu Cervelló 3 Válvula de descarga Esplugues Sant Just 4 Válvula de rec arga 5 Barcelona Contador de recarga Sant Vic enç 6 Válvula de regulación Vallirana Agua limpia de recarga o de extracción
Agua sucia de limpieza L'Hospitalet
Sant Joan Despí Central Cornellà
P2 Sant Cli ment Sant Joan Despi N P22 PII PIII P1 P9 P8 PI P7 P6 Cornellà Depósito Equilibrio P5 Flujo agua subterránea El Prat de cota 10 Sant Boi Sondeo Llobregat reconocimiento P21 recarga nº 1 P12
Estación de Tratamiento Tubería Viladecans Aguas Superficiales "Finques" Rio Llobregat Sant Joan Despí P20 P4 P11 Gavà P19 Cornellà Sta. Creu de Calafell
Ferrocarril de B arcelona a Mart orell P17 P16 P13 Sondeo reconocimiento P18 recarga nº 2 Castelldefels Mar Mediterráneo P10 Rio Llobregat Tubería "Riuet" P15 Ctra. de Barcelona a
Sant Boi de Llobregat Pozos con instalación de recarga 16 AQUIFER RECHARGE IN DEPTH
PUMPING AND INJECTION OPERATIONS
17 QUALITY STANDARDS & COSTS
Nr. of extraction/recharging wells: 12 Recharging capacity: 75 000 m3/day Cost of recharged water: 0,25 €/m3
Water quality parameters in Sant Joan Despí DWTP
Colour: 3 mg Pt/l Turbidity: 0,2 NTU pH: between 6,5 and 8 Sulphates: 200 mg/l Magnesium: 30 mg/l Sodium: 200 mg/l Aluminium: 0,15 mg/l Nitrates: 20 mg/l Ammonia: 0,1 mg/l TOC: 3 mg/l Detergents: 0,1 mg LSS/l Trihalomethanes: 0,1 mg/l 18
INDEX
1. INTRODUCTION
2. ARTIFICIAL RECHARGE IN THE BARCELONA AREA
3. WATER REUSE
19 MANAGED AQUIFER RECHARGE & RECLAIMED WATER
USES OF RECLAIMED WATER IN THE LLOBREGAT AREA
• Increase of 2 m³/s Llobregat River flow Ecologic flow
• Increase availability of water in the catchment SJD water treatment plant for increasing the drinking water source:
– Emergency action – Indirect potable reuse
• Aquifer Recharge in the Llobregat area:
– Infiltration ponds – Hydraulic Barrier against sea water intrusion
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PILOT TEST IN BARCELONA: INDIRECT REUSE
• The tertiary water is pumped 9 km upstream from the Sant Joan Despí WTP catchment. In that point is mixed with the surface water of the river Llobregat and then is treated in Sant Joan Despí WTP.
21 HYDRAULIC BARRIER
The positive hydraulic barrier was constructed in order to stop the advance of the seawater intrusion. It works by injecting reclaimed water from El Prat WWTP in 15 wells EDAR Prat
22 SALINITY STATUS (mg/l)
2009 2011
23 SALINITY STATUS (mg/l)
2012 2013
24 CONCLUSIONS
Llobregat groundwater is an strategic resource in Barcelona and its metropolitan area. Its exploitation has been a key factor for the urban, industrial and economic development.
The combined use of surface and groundwater resources allows a sustainable exploitation of water resources. Groundwater is the key factor in drought periods.
MAR activities are promoted by the users of the aquifer to increase the storage of fresh water. In the Llobregat we have a multi-system of MAR activities, including surface infiltration (scarification, infiltration ponds), and deep recharge using different configurations (ASR in Cornellà and the hydraulic barrier in the coast line).
Reclaimed water is a valuable resource as a recharge water for increase groundwater resources in Mediterranean areas.
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