› sites › default › files › tragsa~1.pdf · water quality evolution along a triplet mar...
TRANSCRIPT
WATER QUALITY EVOLUTION ALONG A "TRIPLET" MAR SCHEME :
WWTP, canal green biofilter,artificial wetland.
Demo site Arenales, Spain
Dr. Enrique Fernández Escalante ([email protected])Dr. Jon San Sebastián Sauto ([email protected])
*http://www.marsol.eu http://www.dina-mar.es
Index
1- INTRODUCTION2- TRIPLETS DEPLOYED IN ARENALES AQUIFER3- WATER QUALITY EVOLUTION DATA4- INTERPRETATIONS UP TO DATE5- CONCLUSIONS
Grupo Tragsa
1- INTRODUCTION
• Los Arenales groundwater body: 2,400 km2, 96 villages in theprovinces of Valladolid, Segovia and Ávila. 46,000 inhabitants
• MAR activities since 2002 in three areas.• Santiuste between 0 and 12,2 hm3/year
• Carracillo between 0 and 5,61 hm3/year
• Alcazarén, máximum 3 hm3/year
• A new scheme called triplet to improve MAR water qualityis being tested in both areas within MARSOL project
3.50
2.25
12.68
0.53
3.13
1.301.80
3.56
2.13
0.00
5.11
1.26 0.71
3.88
0.000.46
12.19
0.970.64
2.50
0
2
4
6
8
10
12
14
2002/03 2003/04 2004/05 2005/06 2006/07 2007/08 2008/09 2009/10 2010/11 2011/12CICLO MAR
DIVERTED vs. RECHARGED VOLUME (hm3)
hm
3
Volumes diverted from the aquifer and groundwater storage variation
measured by means of Water Table Fluctuation (WTF) method
Santiuste Carracillo
Grupo Tragsa
MAR FACILITIES IN ARENALES AQUIFER, SPAIN
Grupo Tragsa
2- TRIPLETS DEPLOYED IN ARENALES AQUIFER. SANTIUSTEDECANTATION SYSTEM-BIOFILTER-ARTIFICIAL WETLAND
Artificial wetland
WWTP by lagooning
Biofilter in the East MAR channel
3
2
1
1
2
3
3
2
1
Grupo Tragsa
-2 km long structure along a MAR canal
-Starts at the junction WWTP-MAR canal with
water from fluvial origin.
SAT-MAR structure integrated by three
elements:
1. WWTP
2. green biofilter
3. artificial ponds to finish the purification
process
Later the water returns to the MAR canal
1- WWTP lagooning
- Volume of reclaimed water / fluvial water: below 5%.
- High concentration of biological processes at the bottom.
2- TRIPLETS DEPLOYED IN ARENALES AQUIFER. SANTIUSTEDECANTATION SYSTEM-BIOFILTER-ARTIFICIAL WETLAND
Grupo Tragsa
Sanchón 1 wetland (2,361 m2).
Sanchón 2 wetland (2,915,8 m2).
2- Green biofilter. Double function:
1- Purifying activity on the potential pollutants by plants
2- Roots pierce and break the clogging in the canal,
increasing the infiltration rate (despite their direct
consumption of water).
Most inventoried species are hydrophilic herbaceous
with an annual cycle, rapid growth, high root expansion
and ease of extraction with roots. E.g. (modified from
Fdez. Escalante, 2005):
Dactylis glomerata
Agrimonia eupatoria
Althaea officinalis
Althaea hirsuta
Carum verticillatum
Elymus hispidus susp. hispidus
Galium palustre
3- Artificial wetlands
Double function:
1- Purification of the water stored in the
vessel
2- Environmental function, as a shelter for
wild fauna.
Iris pseudacorus
Lolium rigidum subsp. rigidum
Sparganium erectum
Tetragonolobus maritimus var. hirsutus
Triglochin palustris
Ranunculus repens
Grupo Tragsa 3-Treatment by lagooning
System to check MAR water quality evolutionUseful for tasks: 6.1 (Site operation), 6.2 (Conductions and piping), 6.3
(Studies for gas clogging), 6.5 (Artificial wetlands) and 6.6 (modelling)
2-Biofilter in a MAR channel
Scheme for the “Carracillo triplet”
1-Infiltration pond
Infiltration pond
Artificial wetland
2- TRIPLETS DEPLOYED IN ARENALES AQUIFER CARRACILLONew „triplet“ scheme (stagnation pond-biofilter-art ificial wetland)
1-Infiltration pond
2-Biofilter in a MAR channel3-Treatment by lagooning
Infiltration by spreading area
Grupo Tragsa
2- TRIPLETS DEPLOYED IN ARENALES AQUIFER: CARRACILLO
Green biofilter. 50 m long canal
- Natural plants to extract nutrients from water
- Penetrate the bottom in order to increase the infiltration rate.
Artificial wetland
-Well dug in a corner to keep studying processes when the
wetland is dried
-Purification process by lagooning + recharge activity
-Spillway structure to the spreading area + security measure in
case of floods.
Spreading area for recharge of the aquifer. It is a sandy and
flat extension receiving water from the artificial wetland to be
infiltrated by simply spreading
1-Stagnation-infiltration pond
ZNS-3 station
-150 m long
- Water comes from a river, NO WWTP source
- Elements:
1- stagnation strainer-infiltration pond
2- green biofilter
3- artificial wetland- spreading area
Stagnation strainer-infiltration pond
Initial strainer going straight to a 42 m2 infiltration pond
Spreading area for Infiltration
Grupo Tragsa
NEW PROPOSED NETWORKS:
1. WATER QUALITY EVOLUTION ALONG INFILTRATION CHANNELS
2. CLOG SAMPLING AND CHARACTERIZATION
3. GROUNDWATER LEVEL EVOLUTION4. GAUGING STATIONS5. INFILTRATION STATIONS
15.04.2015 - In Situ Water Parameters (Multiparameter HANNA HI 9829)
Station X Y pH ORP [mV] DO [ppm] EC [uS/cm] TDS [ppm] Salinity [PSU]EV1-Hongo 370033 4557315 7 60,1 6 413 207 0,23
EV1-Salida balsa ESTE 8 111 7,8 375 190 0,21
EV-2 Canal antes depuradora 369972 4558275 8,41 96,4 8,37 343 172 0,19
WWTP water 7,68 109,7 7,11 584 291 0,32
WWTP and canal, mixed 8,19 91,4 7,18 350 175 0,19
EV-2b 369750 4559248 8,26 121 4,77 370 185 0,2
EV-3 Sanchón 369674 4560291 8,25 133,2 3,75 370 185 0,2
EV-3b 369733 4560915 8,66 127,4 1,45 396 198 0,22
Humedal Artificial (2A) 8,25 138,8 1 920 461 0,51
EV-4 369624 4562556 8,52 130,1 1,43 392 196 0,21
EV-5 369541 4563188 8,49 133,8 1,45 372 186 0,2
EV-6 369361 4564552 8,53 159,6 1,23 374 187 0,2
EV-7 368809 4566014 8,72 143,8 1,42 432 216 0,24
EV-8 368608 4566880 8,72 135,3 1,44 434 217 0,24
EV-9 8,73 125,8 1,63 424 212 0,23
EV-10 8,97 115,7 1,72 418 209 0,23
Laguna de la Iglesia 368678 4562581 9,34 122,8 1,73 3371 1685 2,01
3- WATER QUALITY EVOLUTIONDATASETS
Grupo Tragsa
15.04.2015 - In Situ Water Parameters (Multiparameter HANNA HI 9829)
Station X Y pH ORP [mV] DO [ppm] EC [uS/cm] TDS [ppm] Salinity [PSU] FNU T [°C] P [mbar] TimeEV1-Hongo 370033 4557315 7 60,1 6 413 207 0,23 8,5 13,12 926,4 11:19
EV1-Salida balsa ESTE 8 111 7,8 375 190 0,21 5,5 13,24 925,8 11:28
EV-2 Canal antes depuradora 369972 4558275 8,41 96,4 8,37 343 172 0,19 921 13,41 926,2 11:43
WWTP water 7,68 109,7 7,11 584 291 0,32 940 13,55 926,2 11:45
WWTP and canal, mixed 8,19 91,4 7,18 350 175 0,19 501 13,41 926,1 11:48
EV-2b 369750 4559248 8,26 121 4,77 370 185 0,2 9,5 13,49 926,1 11:58
EV-3 Sanchón 369674 4560291 8,25 133,2 3,75 370 185 0,2 12,3 13,46 926,3 12:04
EV-3b 369733 4560915 8,66 127,4 1,45 396 198 0,22 39,7 13,65 926,1 12:57
Humedal Artificial (2A) 8,25 138,8 1 920 461 0,51 132 14,71 925,8 13:13
EV-4 369624 4562556 8,52 130,1 1,43 392 196 0,21 200 13,67 926,3 13:20
EV-5 369541 4563188 8,49 133,8 1,45 372 186 0,2 348 13,69 927,1 13:27
EV-6 369361 4564552 8,53 159,6 1,23 374 187 0,2 978 13,48 927,2 13:36
EV-7 368809 4566014 8,72 143,8 1,42 432 216 0,24 145 13,41 927,1 13:51
EV-8 368608 4566880 8,72 135,3 1,44 434 217 0,24 181 13,07 928,2 14:03
EV-9 8,73 125,8 1,63 424 212 0,23 36 13,02 927,6 14:25
EV-10 8,97 115,7 1,72 418 209 0,23 15,9 13,64 927,8 14:33
Laguna de la Iglesia 368678 4562581 9,34 122,8 1,73 3371 1685 2,01 940 13,52 926,8 12:32
Grupo Tragsa
3- WATER QUALITY EVOLUTION DATASANTIUSTE TRIPLET
Grupo Tragsa
Grupo Tragsa
Grupo Tragsa
Grupo Tragsa
4- INTERPRETATIONS UP TO DATE
Grupo Tragsa
1. There is a stational effect on the evolution of parameters alongthe triplet:
1. pH. In general increases along the triplet and the canal and withenvironmental Tª increasement
2. ORP. Increasing until de artificial wetland, later comes down along thecanal. Maximum in WWTP
3. DO. Highes values in winter time. In spring decreases with the purificationprocess. After the A.W. decreases slightly along the canal
4. EC. Highest values in the vicinity of the WWTP and the A.W.
5. TDS. Parallel to EC tendency.
6. Salinity. Highest values around WWTP, A.W. and in spring time
7. Turbidity. Highest values before the WWTP and after the A.W. Decrease inFeb and increases in April.
2. The effect of plants in the MAR canals break the clogging layerincreasing the infiltration rate
3. The Carracillo biofilter (150 m) induces a very slight change ofwater quality properties
4- INTERPRETATIONS UP TO DATE
Grupo Tragsa
4- INTERPRETATIONS UP TO DATE (2)
Taken from MARSOL, 2015 (DEL 5.1)
- Main biological processes improve quality water improvement in a wetland
Grupo Tragsa
1. Water source2. Water abstraction3. Water relocation4. Water pre-treatment5. Water recharge6. Water storage7. Water recovery8. Water post treatment9. Water end use10. Measuring water amount11. Measuring water quality12. Comparing efficiency
Characterizing the schemes. Benchmarking
The usage of benchmarking indicators applied to any water recharge system must consider above all the characterization of the framework itself, considering the broad variability of these schemes
Grupo Tragsa
5- CONCLUSIONS
1. Triplets are a combination of elements to purify MAR water during therecharge process
2. Water proceedingg from a WWTP is so scarce in these examples (<5%)that the effects with a biggger volume cannot be tested in Arenales
3. According to the datasets obtained by now, the balance between waterinfiltrated and used by the plants for feeding and evapotranspiration ispositive for the aquifer
4. The presence of artificial wetlands in MAR facilities plays a verycomplementary role
5. Triplets mock-ups must be “tailor made” according to aquiferscharacteristics
6. Excellent opportunities for a bigger presence of MAR facilities in IWRMschemes, specially for temporal cases
