SISTEMA DE PROTEÇÃO DA
AMAZÔNIA
MINISTÉRIO DA DEFESA - BRASIL
Turbidity variation of Madeira
river: monitoring 2008 to 2011
at Porto Velho-RO.
Ana Cristina Strava Correa, Henrique Bernini, Matheus Neves Moura,
Tatiane Checchia, Astrea Jordão, Maurrem Vierira, Taise Bresolim
4ta reunión científica del ORE-HYBAM
6-9 de septiembre 2011
Team researchers
 SIPAM:
Ana Cristina Strava Correa – DSc Geothecnics
Astrea Jordão - Biology
Henrique Bernini – Geographer
Taise Bresolim – MSc Biology
 UNIR:
Tatiane Checchia – MSc Civil Eng
 FARO:
Matheus Neves Moura – Civil Eng
Felipe Archanjo – Civil Eng
Nilena Souza – Civil Eng.
 ANA:
Maurrem Ramon Vieira – Esp. Recursos Hídricos
 CPRM:
Francisco Reis
Research motivation
 Total catchment area: 1.376.577 km² (SNIRH/ANA);
– 24% of Amazonian basin;
 Hydroelectric power plant complex for 6.45 MW (ANEEL);
 Madeira river is responsible for 40% of solid discharge of
Amazonian Basin (Filizola et Guyot, 2009)
 TSS yelds up to: (Switkes, 2008)
– 257 mi/ton.yr suspended solids;
– 37 mi/ton.yr dissolved matter;
 Would the new dynamics of solid discharge impact only
Madeira river?
 What are the consequences over biological chain and
processes?
Madeira river – catchment area
90º curve
• Study area = 984.000 km²
• 75% of total area
• At that point three major
contributors are
integrated:
• Beni (30%)
• Mamoré (25%)
• Guaporé (25%)
Hydroelectric power
Dam locations
90º curve
Eletrobrás, 2004
Monitored section
Commercial port
Monitored section
 Turbidity variation along
section (08/Apr/2009)
At Port: 638 NTU
Monitored section
 Turbidity variation along section – 1 m depth (08/Apr/2009) x ADCP
 At Port: 638 NTU
Methods
 Sonde: YSI Incorporated 6820 (ANA);
 Period: September 2008 to July 2011;
 January to June 2010: the water was collected and
analyzed for TSS and turbidity at FARO laboratory.
 TSS and turbidity were determined at laboratory following
ASTM standard methods Part 2130 A and B – 21ª /2005
and Part 2540 B/2005.
 YSI turbidity sensor calibrated every 3 months
(approximately) with standard turbidity samples for 0, 100
and 1000 NTU
Methods
 Vertical depths collected for 1, 2¹/2, 5 and 10m;
 At each depth – 1 minute for data collection;
 Mean values calculated;
 Quality control of standard deviation;
Turbidity (sensor x lab)
• Lower differences for higher turbidity (3%)
• Errors might be introduced by collection and sampling of water;
• Else: construction works were going on  fast changes in 2010!
Results
YSI - Sept/2008 to july 2009
Water analysed at laboratory
(2010)
YSI - May/2010 to july 2011
River changes
2007
2009
2011
Results
Period: 2008 to 2011
Max turbidity: 1200 NTU
(10% of data above 1027 NTU);
Min turbidity: 13
(90% of data above 62 NTU);
Mean turbidity: 335 NTU;
TSS varying from
 concentration: 98 to 995 mg/L
 mean conc: 325 mg/L
Turbidity x river level
Turbidity x river level
Critical period for turbidity values
 from December to March
Critical period for river levels
 January to May
Registered rain - TRMM
Turbidity x flow
Concentration time for Turbidity x Flow
 There is no linear or unique correlation between rivel level
and turbidity;
 Best correlations for:
 rising flow of 2009
 descending flow of 2011
Turbidity x depth
Turbidity x depth
Challenges ahead
Studies based on water quality
monitoring will continue;
Improved correlation between turbidity
and TSS;
River hydraulics changes and its islands
formation;
Biological indicators of changes.
Thank you!
[email protected]
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[email protected]
[email protected]