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Transcript of 1 The Role of River Vegetation Roughness for Water Purrification in Dniester River Vera Munteanu...
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The Role of River Vegetation Roughness for Water The Role of River Vegetation Roughness for Water Purrification in Dniester RiverPurrification in Dniester River
Vera MunteanuNational Institute of Ecology
Chisinau, Republic of Moldova
NATO ASIFlow and Transport Processes in Complex Obstructed Geometries:
from cities and vegetative canopies to industrial problem
Kyev, Ukraine, May 4-15, 2004
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L’eau est le passé de l’hommeL’eau est le passé de l’homme
Les eaux sont l’avenir de l’humanité Les eaux sont l’avenir de l’humanité
“The wars of the next century will be “The wars of the next century will be about water”about water”
Ismail Serageldin, World Bank Vice-PresidentIsmail Serageldin, World Bank Vice-President
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Meeting Ecological and Societal Needs for Freshwater Ecosystems in Light of Growing
Worlwide Human Water
“Vizualizing Engineering and Management Solutions
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MOLDOVA REPUBLIC OF : 4.4 mln.population 33.700 km2 – total area
DNIESTER RIVERTotal length 1352 km - for Moldova territory - 630 km Basin Area : Total 72100 sq.km - for Moldova territory -19070 sq.km
10 mln population (Source of drinking water )
Population density – 105 people per sq.km
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Hydrographical network
Anenii-Noi
Balta ta
Balti
Basarabeasca
B riceni
Cahul
Camenca
Causeni
Ceadir-Lunga
Chis inau
C im is lia
Com rat
Cornesti
Donduseni
Dubasari
Edinet
Falesti
F loresti
G lodeni
G rig iriopol
Leova
N isporeni
O cnita
O rhe i
RezinaR ibnita
R iscani
S ingere i
Soldanesti
Soroca
S tefan-Voda
Telenesti
T iraspol
Vulcanesti
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DUBASARI RESERVOIR:
Total length: 125 km
Total volume: 0.5 km3
0.9 mln. population (source of drinking water )
Water quality formation (significant influence)
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Metal Contents in the Neighbours Soil of the Dubasari Reservoir, (North – negative values; South – positive values)
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Cement productionEmission:1 mln tonn - Mercury, 160 kg Cadmium, 350 kg Lead, 17 tonn Copper, 22 tonn
Natural gas - 0.05 km 3
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Interdependence of Toxic Metal Concentration in Abiotic Components of Dubasari Reservoir, Dniester River
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Coefficients of (bio)concentration (k) and linear correlation (r).
Mercury(II), Dubasari aquatic ecosystem
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Vegetation roughness(Potamogeton perfoliatus L., Potamogeton pectinatus L., Myriophillum
verticillatum L., Ceratophyllum demersum)
Empirical relation:
=0.0793·k·ln(h/k)-0.00090
where - characteristic length scale of turbulence;
k - vegetation height, (m); h - water depth, (m)
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Case study
0
390
780
1170
1560
-35 -10 0
s, km
b, m
kg/(
gm)
-54
-38
-22
-6
10
b, m
kg/(
gm)
Cu
Pb
Hg
Cd
aa
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The dependence between macrophytes bioaccumulation capacity and length scale of turbulence ()
Linear interdependence
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Hydrodynamic regime
(velocity)
Bottom sediment geochemistry
carbonates, interstitial water
calcium, interstitial water
Factors that Influence…
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The effect of water treatment process on Hg(II), Cu(II), and Pb(II) content variation
(Chisinau Water Treatment Plant, drinking purpose)
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Conclusions
- Mercucy and Cadmium - highest anthropogenic enrichment factor - higher toxicity potential
- The neighboring area - radius of about 20 km of the industrial complex Rezina-Rabnita, medium part of Dubasari Reservoir of the Dniester River
- Metal content from sediment …influence on its level in particulate form … predominant for all reservoir longitudinal distance (hydrodinamical regime, water hydrochemistry; biota, sediment’s geochemistry
-Macrophytes in biomonitoring (correlation of metal content in biomass..)-Vegetation roughness…-Water treatment processes (mercury, dissolved form), for drinking purpose
Work to be done:
-to prevent the erosion process in the river bank -Vegetation, condition for growth and removing -to improve technological scheme at the cement and metallurgical plants
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The decison-making process:The decison-making process:the Ukrainian and the Moldavian: two similar drops the Ukrainian and the Moldavian: two similar drops
of water?of water?
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Acknowledgements
This work was supported by the Research Support Scheme of the Open This work was supported by the Research Support Scheme of the Open Society Support Foundation, Society Support Foundation,
National Ecological Fund National Ecological Fund
NATO ASI Organizing CommitteeNATO ASI Organizing Committee