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The Study on Water Quality of the Return Flow in Lower Tap Salao Irrigation Project Hungspreug N. 1 Chooaksorn W. 2 and Sudcha P. 3 Department of Environmental.

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Presentation on theme: "The Study on Water Quality of the Return Flow in Lower Tap Salao Irrigation Project Hungspreug N. 1 Chooaksorn W. 2 and Sudcha P. 3 Department of Environmental."— Presentation transcript:

1 The Study on Water Quality of the Return Flow in Lower Tap Salao Irrigation Project Hungspreug N. 1 Chooaksorn W. 2 and Sudcha P. 3 Department of Environmental Science, Faculty of Science and Technology, Thammasat University, Patumtanee, Thailand Email : 1 n_hungspreug@yahoo.com, 2 chooaksorn@yahoo.com, n_hungspreug@yahoo.comchooaksorn@yahoo.com 3 psudcha@yahoo.compsudcha@yahoo.com

2 Purpose Determine and compare water quality of the irrigation canal and drainage canal in Sakaekrang river basin, Thailand Department of Environmental Science, Thammasat University

3 Water degradation was clearly caused by agriculture sources (non-point sources). Introduction Department of Environmental Science, Thammasat University

4 Introduction (cont’) Irrigation canals Irrigated area Drainage canals Water Quality ?

5 In 1993, in USA 65 % of rivers suffered the impacts from non-point source pollution. (US Department of Pollution Control, 2002). In Thailand non-point sources pollution is the cause of severe water pollution. (Simachaya, 2000) Introduction (cont’) Department of Environmental Science, Thammasat University

6 Methodology Department of Environmental Science, Thammasat University

7 Study Area Southern Tap Salao in with part of Tab Salao irrigation project in the upper central part of Thailand. covering 14,000 ha. The water supply to this irrigation project came from the upstream Tab salao reservoir. Department of Environmental Science, Thammasat University

8 Southern Tap Salao irrigation project

9 Sampling Stations 45 water quality sampling stations. irrigation canal 22 stations drainage canal 23 stations collected samples during January 19 th -22 rd, 2007 Department of Environmental Science, Thammasat University

10 Water Quality Sampling Stations Drainage canal stations Irrigation canal stations

11

12 Drainage canal stations

13 Parameters. pH Conductivity (EC) Temperature (Temp) Turbidity (Tur) DO BOD NO 3 – -N NH 3 + -N PO 4 3- -P TS TDS SS Department of Environmental Science, Thammasat University

14 Results Department of Environmental Science, Thammasat University

15 ParametersUnit Irrigation canalsDrainage canals RangeAverageRangeAverage pH-6.78-9.717.586.59-7.797.36 ECµm/cm122.73-369.80185.02104.30-413.80217.10 Temp.°C26.03-33.1729.9325.37-32.4028.75 TurbidityNTU6.62-126.3348.837.03-111.0031.38 DOmg/l1.00-8.974.370.80-4.803.27 BODmg/l0.53-6.773.180.25-5.371.89 Department of Environmental Science, Thammasat University

16 ParametersUnitIrrigation canalsDrainage canals RangeAverageRangeAverag e NO - 3 mg/l0.04-0.150.090.05-0.240.09 NH + 3 mg/l0.04-0.250.120.03-0.360.12 PO 4 3- mg/l0.11-0.400.200.07-0.340.15 TSmg/l122.50-364.00205.79122.50-454.33211.19 TDSmg/l105.17-262.00159.18111.50-441.33184.13 SSmg/l7.44-133.3346.615.00-93.5627.06 Department of Environmental Science, Thammasat University

17 ParametersUnit Irrigation canalsDrainage canals RangeAverageRangeAverage pH-6.78-9.717.586.59-7.797.36 Conductivityµm/cm122.73-369.80185.02104.30-413.80217.10 Temperature°C26.03-33.1729.9325.37-32.4028.75 TurbidityNTU6.62-126.3348.837.03-111.0031.38 DOmg/l1.00-8.974.370.80-4.803.27 BODmg/l0.53-6.773.180.25-5.371.89 Department of Environmental Science, Thammasat University

18 pH

19 ParametersUnit Irrigation canalsDrainage canals RangeAverageRangeAverage pH-6.78-9.717.586.59-7.797.36 EC µm/cm 122.7-369.8185.0104.3-413.8217.1 Temperature°C26.03-33.1729.9325.37-32.4028.75 TurbidityNTU6.62-126.3348.837.03-111.0031.38 DOmg/l1.00-8.974.370.80-4.803.27 BODmg/l0.53-6.773.180.25-5.371.89 Department of Environmental Science, Thammasat University

20 Conductivity µm/cm

21 ParametersUnit Irrigation canalsDrainage canals RangeAverageRangeAverage pH-6.78-9.717.586.59-7.797.36 Conductivityµm/cm122.73-369.80185.02104.30-413.80217.10 Temp°C 26.0-33.229.925.4-32.428.7 TurbidityNTU6.62-126.3348.837.03-111.0031.38 DOmg/l1.00-8.974.370.80-4.803.27 BODmg/l0.53-6.773.180.25-5.371.89 Department of Environmental Science, Thammasat University

22 Temperature °C

23 ParametersUnit Irrigation canalsDrainage canals RangeAverageRangeAverage pH-6.78-9.717.586.59-7.797.36 Conductivityµm/cm122.73-369.80185.02104.30-413.80217.10 Temperature°C26.03-33.1729.9325.37-32.4028.75 TurNTU6.6-126.348.87.0-111.031.4 DOmg/l1.00-8.974.370.80-4.803.27 BODmg/l0.53-6.773.180.25-5.371.89 Department of Environmental Science, Thammasat University

24 Turbidity NTU

25 ParametersUnit Irrigation canalsDrainage canals RangeAverageRangeAverage pH-6.78-9.717.586.59-7.797.36 Conductivityµm/cm122.73-369.80185.02104.30-413.80217.10 Temperature°C26.03-33.1729.9325.37-32.4028.75 TurbidityNTU6.62-126.3348.837.03-111.0031.38 DOmg/l1.0-8.974.370.8-4.83.27 BODmg/l0.53-6.773.180.25-5.371.89 Department of Environmental Science, Thammasat University

26 Dissolved Oxygen (DO) mg/l

27 ParametersUnit Irrigation canalsDrainage canals RangeAverageRangeAverage pH-6.78-9.717.586.59-7.797.36 Conductivityµm/cm122.73-369.80185.02104.30-413.80217.10 Temperature°C26.03-33.1729.9325.37-32.4028.75 TurbidityNTU6.62-126.3348.837.03-111.0031.38 DOmg/l1.00-8.974.370.80-4.803.27 BODmg/l0.5-6.83.20.3-5.41.9 Department of Environmental Science, Thammasat University

28 Biochemical Oxygen Demand (BOD) mg/l

29 ParametersUnitIrrigation canalsDrainage canals RangeAverageRangeAverage NO - 3 mg/l0.04-0.150.090.05-0.240.09 NH + 3 mg/l0.04-0.250.120.03-0.360.12 PO 4 3- mg/l0.11-0.400.200.07-0.340.15 TSmg/l122.50-364.00205.79122.50-454.33211.19 TDSmg/l105.17-262.00159.18111.50-441.33184.13 SSmg/l7.44-133.3346.615.00-93.5627.06 Department of Environmental Science, Thammasat University

30 NO 3 -N mg/l NH 3 -N

31 ParametersUnitIrrigation canalsDrainage canals RangeAverageRangeAverag e NO - 3 mg/l0.04-0.150.090.05-0.240.09 NH + 3 mg/l0.04-0.250.120.03-0.360.12 PO 4 3- mg/l0.11-0.400.200.07-0.340.15 TSmg/l122.50-364.00205.79122.50-454.33211.19 TDSmg/l105.17-262.00159.18111.50-441.33184.13 SSmg/l7.44-133.3346.615.00-93.5627.06 Department of Environmental Science, Thammasat University

32 Phosphate Phosphorus (PO 3 4- -P) mg/l

33 ParametersUnitIrrigation canalsDrainage canals RangeAverageRangeAverag e NO - 3 mg/l0.04-0.150.090.05-0.240.09 NH + 3 mg/l0.04-0.250.120.03-0.360.12 PO 4 3- mg/l0.11-0.400.200.07-0.340.15 TSmg/l122.5-364.0205.8122.5-454.3211.2 TDSmg/l105.17-262.00159.18111.50-441.33184.13 SSmg/l7.44-133.3346.615.00-93.5627.06 Department of Environmental Science, Thammasat University

34 Total Solid (TS)

35 ParametersUnitIrrigation canalsDrainage canals RangeAverageRangeAverage NO - 3 mg/l0.04-0.150.090.05-0.240.09 NH + 3 mg/l0.04-0.250.120.03-0.360.12 PO 4 3- mg/l0.11-0.400.200.07-0.340.15 TSmg/l122.50-364.00205.79122.50-454.33211.19 TDSmg/l105.2-262.0159.2111.5-441.3184.1 SSmg/l7.44-133.3346.615.00-93.5627.06 Department of Environmental Science, Thammasat University

36 Total Dissolved Solid (TDS)

37 ParametersUnitIrrigation canalsDrainage canals RangeAverageRangeAverag e NO - 3 mg/l0.04-0.150.090.05-0.240.09 NH + 3 mg/l0.04-0.250.120.03-0.360.12 PO 4 3- mg/l0.11-0.400.200.07-0.340.15 TSmg/l122.50-364.00205.79122.50-454.33211.19 TDSmg/l105.17-262.00159.18111.50-441.33184.13 SSmg/l7.4-133.346.65.0-93.627.1 Department of Environmental Science, Thammasat University

38 Suspended Solid (SS)

39 Conclusion

40 The water quality in the irrigation canals was better than in drainage canals. Department of Environmental Science, Thammasat University

41 The water quality in the irrigation canal was classified as class 3 (medium clean) (1) consumption after treatment process. (2) agriculture Conclusion (cont’) Department of Environmental Science, Thammasat University

42 The water quality in the drainage canal was classified as class 4 (fairly clean) (1) consumption after special treatment process (2) industry Conclusion (cont’) Department of Environmental Science, Thammasat University

43 The water quality in the irrigation canal was not significant different from that in the drainage canal. Conclusion (cont’) Department of Environmental Science, Thammasat University

44 Water drained from Irrigated area which mostly claimed as non point sources pollutant somehow the irrigation area can acts as constructed wetland which can improve some water quality parameters. Department of Environmental Science, Thammasat University Conclusion (cont’)

45 Recommendation

46 Water qualities monitoring programme should be continued at certain sampling stations over a longer period. Recommendation Department of Environmental Science, Thammasat University

47 Acknowledgement Staff of southern Tap Salao irrigation project, Royal Irrigation Department. Department of Environmental Science, Thammasat University

48 Thank you for your attention.

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