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12 129 Gunawardana P.V.S.L

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University of Sri Jayewardenepura, Dept Forestry and Environment

The document analyzes variation in physiochemical parameters along part of the Dutch Canal in Sri Lanka which receives effluent from shrimp farms. Water samples from five sites showed higher levels of chlorophyll a, turbidity, pH, ammonia, phosphate and biological oxygen demand at certain sites indicating impact from farming activities. The study concludes the receiving water quality is negatively impacted especially around Udappuwa, Madurankuliya and Muthupanthiya and recommends complementary treatment systems and awareness programs for resource users.

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Variation of some physiochemical parameters along a part of the Dutch cannel in North Western Province of Sri Lanka P.V.S.L. Gunawardena U.P.K. Epa M. Hettiarachchi University of Kelaniya
Introduction ,[object Object],[object Object],[object Object],[object Object]
 
Introduction cont……. ,[object Object],[object Object],[object Object]
Introduction cont……. ,[object Object],[object Object],[object Object]
Objectives ,[object Object],[object Object]
Methodology ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Methodology cont……. ,[object Object],[object Object],[object Object],On the field In the laboratory after preserving
Results and Discussion ,[object Object],[object Object],Parameter Average Values ± Standard error Karukkupane Nalladarankattuwa Muthupanthiya Udappuwa Madurankuliya TDS 11207 ± 1053 ppm 11560 ± 1266 ppm 13869 ± 728 ppm 14532± 1023 ppm 12873± 1108 ppm Conductivity 27.5 ± 8.4 mS/cm 32.5 ± 7.8 mS/cm 17.6 ± 9.2 mS/cm 17.3 ± 8.6 mS/cm 19.6± 7.3 mS/cm Turbidity 24± 7.3 NTU 11± 7.4 NTU 31± 11.1 NTU 28 ± 7.6 NTU 45 ± 13.4 NTU Salinity 22ppt ± 9 24 ppt ± 9 18 ppt ± 9 23ppt ± 7 19ppt ± 8 DO 4.03±0.9 mg/l a 3.42±0.9 mg/l a 4.79±2.0 mg/l b 5.75±2.2 mg/l b 4.60±1.1mg/l b BOD 2.8±1.8 mg/l 2.3±1.3 mg/l 3.5±1.6 mg/l 4.5±1.7 mg/l 4.6±1.5 mg/l Temperature 29.5±1.5 o C a 30.5±2.0 o C b 31.0±1.5 o C b 31.0±1.5 o C b 31.5±1.0 o C b pH 7.8±0.3 a 7.7±0.3 a 7.9±0.4 b 8.0±0.5 b 8.3±0.4 b
Variation of temperature in top water levels Temperature o C Karukkupane Muthupanthiya Nalladarankattuwa Udappuwa Madurankuliya
Variation of Dissolved Oxygen in top water DO level (mg/l) Karukkupane Muthupanthiya Nalladarankattuwa Udappuwa Madurankuliya
Variation of pH in top water levels pH Karukkupane Muthupanthiya Nalladarankattuwa Udappuwa Madurankuliya
Variation of Chemical and biological factors Parameter Karukkupane Nalladarankattuwa Muthupanthiya Udappuwa madurankuliya PO 4 -3 0.046 mg/l ± 0.025 0.047mg/l ± 0.021 0.018mg/l ± 0.007 0.104mg/l ± 0.261 0.030mg/l ± 0.048 [NH 3 ] 0.120 mg/l ± 0.087 0.041 mg/l ± 0.020 0.076 mg/l ± 0.039 0.215 mg/l ± 0.096 0.226 mg/l ± 0.097 [Chlorophyll a] 24.00 mgm -3 6.63 a 12.76mgm -3 5.26 b 20.55mgm -3 4.21 b 29.56 mgm -3 7.74 a 32.85 mgm -3 18.27 c Average value ± std. error
Variation of Chlorophyll a concentration Chlorophyll a level ( mgm -3 ) Karukkupane Muthupanthiya Nalladarankattuwa Udappuwa Madurankuliya
Bottom water layer ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Variation of bottom turbidity places Turbidity (NTU) Karukkupane Muthupanthiya Nalladarankattuwa Udappuwa Madurankuliya
Variation of bottom pH in different palaces pH Karukkupane Muthupanthiya Nalladarankattuwa Udappuwa Madurankuliya
Variation of NH3 NH3 Concentration (mg /l) Karukkupane Muthupanthiya Nalladarankattuwa Udappuwa Madurankuliya
Variation of bottom BOD BOD (mg/l) Karukkupane Muthupanthiya Nalladarankattuwa Udappuwa Madurankuliya
Variation of bottom PO4 -3 PO4 -3 concentration (mg/l) Karukkupane Muthupanthiya Nalladarankattuwa Udappuwa Madurankuliya
Conclusion ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object]
Suggesions ,[object Object],[object Object]
Thank you
` Karukkupane Nalladarankattuwa Muthupanthiya Udappuwa Madurankuliya

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12 129 Gunawardana P.V.S.L

  • 1. Variation of some physiochemical parameters along a part of the Dutch cannel in North Western Province of Sri Lanka P.V.S.L. Gunawardena U.P.K. Epa M. Hettiarachchi University of Kelaniya
  • 2.
  • 3.  
  • 4.
  • 5.
  • 6.
  • 7.
  • 8.
  • 9.
  • 10. Variation of temperature in top water levels Temperature o C Karukkupane Muthupanthiya Nalladarankattuwa Udappuwa Madurankuliya
  • 11. Variation of Dissolved Oxygen in top water DO level (mg/l) Karukkupane Muthupanthiya Nalladarankattuwa Udappuwa Madurankuliya
  • 12. Variation of pH in top water levels pH Karukkupane Muthupanthiya Nalladarankattuwa Udappuwa Madurankuliya
  • 13. Variation of Chemical and biological factors Parameter Karukkupane Nalladarankattuwa Muthupanthiya Udappuwa madurankuliya PO 4 -3 0.046 mg/l ± 0.025 0.047mg/l ± 0.021 0.018mg/l ± 0.007 0.104mg/l ± 0.261 0.030mg/l ± 0.048 [NH 3 ] 0.120 mg/l ± 0.087 0.041 mg/l ± 0.020 0.076 mg/l ± 0.039 0.215 mg/l ± 0.096 0.226 mg/l ± 0.097 [Chlorophyll a] 24.00 mgm -3 6.63 a 12.76mgm -3 5.26 b 20.55mgm -3 4.21 b 29.56 mgm -3 7.74 a 32.85 mgm -3 18.27 c Average value ± std. error
  • 14. Variation of Chlorophyll a concentration Chlorophyll a level ( mgm -3 ) Karukkupane Muthupanthiya Nalladarankattuwa Udappuwa Madurankuliya
  • 15.
  • 16. Variation of bottom turbidity places Turbidity (NTU) Karukkupane Muthupanthiya Nalladarankattuwa Udappuwa Madurankuliya
  • 17. Variation of bottom pH in different palaces pH Karukkupane Muthupanthiya Nalladarankattuwa Udappuwa Madurankuliya
  • 18. Variation of NH3 NH3 Concentration (mg /l) Karukkupane Muthupanthiya Nalladarankattuwa Udappuwa Madurankuliya
  • 19. Variation of bottom BOD BOD (mg/l) Karukkupane Muthupanthiya Nalladarankattuwa Udappuwa Madurankuliya
  • 20. Variation of bottom PO4 -3 PO4 -3 concentration (mg/l) Karukkupane Muthupanthiya Nalladarankattuwa Udappuwa Madurankuliya
  • 21.
  • 22.
  • 23.
  • 25. ` Karukkupane Nalladarankattuwa Muthupanthiya Udappuwa Madurankuliya