Characterization of the Water Quality Status on a Stretch of River Lérez around a Small Hydroelectric Power Station
Abstract
:1. Introduction
2. Materials and Methods
2.1. Study Area
2.2. Small Hydroelectric Power Station and River Lérez Reach
2.3. Environmental Parameters, Water Status Indicators and Quality Criteria
2.4. Sampling and Methodology
Sampling points | Location | UTM | Sampling |
---|---|---|---|
1 | Upstream the dam | 29T 541617–4708067 | Physicochemical parameters |
2 | Downstream the dam | 29T 541471–4708055 | Physicochemical parameters |
Biological index (stream section) | |||
3 | Upstream the tailrace | 29T 539467–4707928 | Physicochemical parameters |
Biological index (stream section) | |||
4 | Downstream the tailrace | 29T 539195–4708058 | Physicochemical parameters |
Biological index (stream section) |
2.5. Sampling Period and Frequency
2.6. Analyses
3. Results and Discussion
3.1. Physicochemical Characteristics of the Water
Parameters | Point 1 | Point 2 | Point 3 | Point 4 | Kruskal–Wallis test | ||||
---|---|---|---|---|---|---|---|---|---|
Mean | SD | Mean | SD | Mean | SD | Mean | SD | ||
pH | 5.97 | 0.56 | 5.98 | 0.34 | 6.15 | 0.30 | 5.99 | 0.76 | 2.452, p = 0.484 |
Temperature (°C) | 12.10 | 3.90 | 12.43 | 3.91 | 12.89 | 3.95 | 12.27 | 4.05 | 0.249, p = 0.969 |
Dissolved oxygen (mg/L) | 10.67 | 1.32 | 11.43 | 1.16 | 11.13 | 1.11 | 11.54 | 1.53 | 3.557, p = 0.313 |
Conductivity (mS/cm) | 0.040 | 0.013 | 0.037 | 0.005 | 0.038 | 0.005 | 0.040 | 0.010 | 0.642, p = 0.887 |
3.1.1. pH
Parameters | Reference condition | Threshold good/moderate | Threshold moderate/bad |
---|---|---|---|
Temperature (°C) | 13.00 | 10.4–15.6 | - - |
Conductivity (µS/cm) * | 40.00 | <300 | |
Dissolved oxygen (mg/L) * | 9.00 | 6.70 | - - |
pH * | 7.00 | 6.0–8.4 | - - |
IBMWP | 230.00 | 162.00 | 20.20 |
NFAM | 37.00 | 25.50 | 3.20 |
IASPT | 6.30 | 4.40 | 0.60 |
3.1.2. Temperature
3.1.3. Dissolved Oxygen
3.1.4. Conductivity
3.2. Biological Status of the Water
Index | Reference condition River type 21 | San Xusto SHP plant | |||
---|---|---|---|---|---|
2007 | 2008 | 2009 | 2010 | ||
IBMWP | 230.00 | 120.00 | 92.25 | 123.83 | 124.58 |
EQR-IBMWP % | 0.52 | 0.40 | 0.54 | 0.54 | |
NFAM | 37.00 | 13.75 | 18.33 | 18.58 | |
EQR-Taxa % | 0.37 | 0.50 | 0.50 | ||
IASPT | 6.30 | 6.75 | 6.76 | 6.73 | |
EQR-IASPT % | 1.07 | 1.07 | 1.07 |
3.3. Ecological Status of the Riparian Zones
4. Summary and Conclusions
Acknowledgments
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Valero, E. Characterization of the Water Quality Status on a Stretch of River Lérez around a Small Hydroelectric Power Station. Water 2012, 4, 815-834. https://doi.org/10.3390/w4040815
Valero E. Characterization of the Water Quality Status on a Stretch of River Lérez around a Small Hydroelectric Power Station. Water. 2012; 4(4):815-834. https://doi.org/10.3390/w4040815
Chicago/Turabian StyleValero, Enrique. 2012. "Characterization of the Water Quality Status on a Stretch of River Lérez around a Small Hydroelectric Power Station" Water 4, no. 4: 815-834. https://doi.org/10.3390/w4040815