1. ASSESSING THE WATER QUALITY OF DONG NAI RIVER BY MIKE 11 MODEL
TowardanOpenResourcesUsingServices
ASSESSING THE WATER QUALITY OF DONG NAI RIVER BY MIKE 11 MODEL
Le Quoc Tuan
Ngo Thi Kieu Diem

2. CONTENTS
OVERVIEW 1
RESEARCH METHODS 2
RESULTS 3
CONCLUSION 4

3. 1
OVERVIEW
Dong Nai province located in the southern economic region with 31 industrial zones.
Dong Nai river (DNR) is an inland longest river (in Vietnam) which flows through Dong Nai province with 294 km in long.
Dong Nai river supplies fresh water for living activities, agricultural and industrial production, transportation…
Dong Nai river also collects wastewater from industrial zones such as Loteco, Amata, Bien Hoa I, Bien Hoa II,…domestic water from communities.

4. 1
OVERVIEW
DONG NAI RIVER WATERSHED

5. OVERVIEW INDUSTRIAL ZONES IN DONG NAI PROVINCE 1 Industrial zone
Hydrological system
INDUSTRIAL ZONES IN DONG NAI PROVINCE

6. OVERVIEW RESEARCH GOALS 1 Calculate the load of wastes at present
Assess the water quality fluctuation of Dong Nai river
Propose management solution
Forecast the loads of wastes up to 2020
Forecast the water quality of Dong Nai river up to 2020
Forecast capacity of receiving waste water

7. 2
RESEARCH METHODS
Data collection

8. Soft wares for data analysis2
RESEARCH METHODS
RESEARCH METHODS
Soft wares for data analysis

9. Methods for assessing water quality2
RESEARCH METHODS
RESEARCH METHODS
Methods for assessing water quality
Decision
879/QĐ-TCMT
(Vietnam Environment Admistration)
WQIa (DO, BOD5, COD, N-NH4+, P-PO43-)
WQIb (TSS, Turbidity)
WQI for pH
Total
WQI
WQIc (Coliform)

10. Methods for assessing water quality2
RESEARCH METHODS
Methods for assessing water quality
WQIa: WQI for 05 parameters: DO, BOD5, COD, N-NH4+, P-PO43-
WQIb: WQI for 02 parameters: TSS, turbidity
WQIc: WQI for Coliform
WQIpH: WQI for pH.

11. Methods for assessing water quality2
RESEARCH METHODS
Methods for assessing water quality
WQI
Level for assessing water quality
Color
91 – 100
For domestic water supply
Blue
For domestic water supply after an appropiate treatment
Green
For drainage and simlar purpose
Yellow
For navigation and similar purpose
Orange
0 - 25
Very polluted, need to be treated in the future
Red

12. Modeling by Mike 11 RESEARCH METHODS 2
Margin conditions for hydraulic model:
Upper load margin, Tri An lake outlet.
Lower level water margin: Dong Nai river lower.
Concentration margin:
78 concentration margin, monitoring data (37), collecting data (41).
Point type, Non-point type

13. 2
RESEARCH METHODS 2
Survey locations for MIKE 11 application

14. RESEARCH METHODS 2 Survey location Location information 1
Thien Tan water supply plant, Vinh Cuu district. 2
Dong Nai river lower, near Dong Nai bridge, Bien Hoa city. 3
Dong Nai river lower basin, Nhon Trach district.
Compare modeling results with monitoring results for BOD5, COD, total N, total P, TSS;
Modeling results and monitoring results at three locations are nearly fixed, average error fluctuating from 10 to 19%.

15. Application tools for determine the capacity of2
RESEARCH METHODS
Application tools for determine the capacity of
waste water receiving

16. RESULTS 3 Sector 1 Sector 2 Sector 3 Sector 4
Water quality of Dong Nai River (DNR)
Sector 1
Confluence Da Hoai river - DNR to Tri An Lake inlet
Sector 2
Confluence of Be river – DNR to Ba Mieu wharf, Thanh Phu district
Sector 3
Hoa An bridge to Dong Nai bridge
Sector 4
Confluence Buong river – DNR to confluence Sai Gon river – DNR

17. RESULTS 3 Water quality of Dong Nai River (DNR)
Sector 1 (Confluence Da Hoai river - DNR to Tri An Lake inlet)
This is region where receiving water from Lam Dong province. Water quality is stable in dry season (December to March), rainy season (April to November) decrease because of TSS and coliform over National technical regulation (QCVN).

18. RESULTS 3 Waste sources to Sector 1: 2.844 m3/day
Aquaculture: 39 m3/day, COD, TSS, N-NH4+ over QCVN
Industries: m3/day, TSS; COD, BOD5, N-NH4+, N-NO2- and P-PO43- over QCVN
Markets: 5 m3/day almost over QCVN
Industrial zones: 24 m3/day
Sanitary (Health): 16 m3/day, N-NH4+, N-NO3- and
P-PO43 over QCVN
Domestic waste: 319 m3/day, TSS P-PO43- over QC

19. 3
RESULTS
Sector 2 (Confluence of Be river – DNR to Ba Mieu wharf, Thanh Phu district)
Water quality in Sector 2 is good and satisfy the domestic water supply (in months 1, 2, 3, 4, 6, 9, 10, 11). Sometimes, water is polluted because of TSS and ammonia (July and August).

20. RESULTS 3 Waste sources to Sector 2 : 24.060 m3/ngày
Aquaculture: 198 m3/day, TSS, COD, BOD5, N-NH4+ over QCVN
Industries: m3/day, N-NH4+, N-NO3- N-NO2- over QCVN
Industrial zones: m3/day
Sanitary (Health): 61 m3/day, N-NH4+ and
N-NO3- over QCVN
Domestic: m3/day, N-NH4+ over QCVN
Market: 194 m3/day, TSS over QCVN

21. 3
RESULTS
Sector 3 (Hoa An bridge to Dong Nai bridge, flow through Bien Hoa city)
Water quality meets the domestic water supply, however, there is decreasing tendency.
There are randomly areas where water quality become polluted such as Tan Mai, San Mau, Linh streams and Tan Mai floating fish culture village.

22. RESULTS 3 Waste sources to Sector 3: 153.462 m3/ngày
Aquaculture: 25 m3/day, TSS, COD,BOD5, N-NH4+ over QCVN
Industries: m3/day, NO2-, TSS over QCVN
Markets: 280 m3/ngày, TSS, NH4+, BOD5, PO43- over QCVN
Industrial zones: m3/day, NO2- over QCVN.
Sanitary (Health): m3/day, TSS, COD over QCVN
Domestic: m3/day, TSS, NH4+ over QCVN

23. 3
RESULTS
Sector 4: Confluence Buong river – DNR to confluence Sai Gon river – DNR
Water quality satisfies the aquatic conservation standard. DO was lower QCVN, TSS, Fe ion, E.coli and coliform over QCVN

24. RESULTS 3 Waste sources to Sector 4: 35.111 m3/day
Husbandry, aquaculture: 324 m3/day, TSS over QCVN
Industries: m3/day,
almost over QCVN.
Industrial zones: m3/day
Markets: 110 m3/day
Domestic: 935 m3/day
Sanitary (Health): 570 m3/day

25. Waste loads release to DNR3
RESULTS
Waste loads release to DNR
BOD (kg/day)
2013
COD (kg/day)
Flow
m3/day
Total N (kg/day)
Total N
354 (kg/day)
TSS (kg/day)

26. RESULTS 3 Scenarios to 2020 Scenario 1 Scenario 2 Scenario 3
Water flow increase with economic development planning.
Waste concentrations are the same as 2013’s
Scenario 1
Water flow increase with economic development planning
Waste water from urban, industry, culture, sanitary, …were treated to B (QCVN)
Scenario 2
All waste water were treat to A (QCVN)
Scenario 3

27. Forecast for the waste loads to DNR3
RESULTS
Forecast for the waste loads to DNR
BOD (kg/day)
2020
COD (kg/day)
Flow
m3/day
Scenario 1
Total N (kg/day)
Total P (kg/day)
TSS (kg/day)

28. Forecast for the waste loads to DNR3
RESULTS
Forecast for the waste loads to DNR
BOD (kg/day)
2020
COD (kg/day)
Flow
m3/day
Scenario 2
Total N
(kg/day)
Total P
4.241 (kg/day)
TSS (kg/ngày)

29. Forecast for the waste loads to DNR3
RESULTS
Forecast for the waste loads to DNR
2020
BOD (kg/day)
COD (kg/day)
Flow
m3/day
Scenario 3
Total N
9.315 (kg/day)
Total P
2.528 (kg/day)
TSS (kg/day)

30. RESULTS 3 Forecast for water quality and capacity of
waste water receiving by DNR
BOD
Locations 1, 2: lowest 300 (ton/day) and highest in Aug. – Oct. about 1750 (ton/day), average 1000 (ton/day)
BOD at location 1 meets QCVN 08:2009 (for surface water), column A2

31. RESULTS 3 Forecast for water quality and capacity of
waste water receiving by DNR
BOD at location 2 also meets QCVN 08:2009,
column A2

32. RESULTS 3 Forecast for water quality and capacity of
waste water receiving by DNR
BOD
Location 3, from 100 to 1000 (ton/day),
average 500 (ton/day)
BOD at location 3 meets QCVN 08:2009,
column B2

33. 3
RESULTS
COD
Locations 1, 2: from Jan to Jul fluctuates from 500 to 2000 (ton/day) and max (ton/day),
max average load 2100 (ton/day)
COD at location 1 meet QCVN 08:2009, column A2

34. COD at location 2 meets QCVN 08:2009, column A23
RESULTS
COD at location 2 meets QCVN 08:2009, column A2

35. RESULTS 3 COD Location 3: max load 1.800 ton/day,
average 900 (ton/day)
COD at location 3 meets QCVN 08:2009, column B2

36. Total N at location 1 meets QCVN 08:2009, column A23
RESULTS
Total N
Locations 1, 2: fluctuate from 250 ton 700 (ton/day) and max load 1100 (ton/day), average 600 (ton/day)
Total N at location 1 meets QCVN 08:2009, column A2

37. Total N at location 2 also meets QCVN 08:2009, column A23
RESULTS
Total N at location 2 also meets QCVN 08:2009, column A2

38. 3
RESULTS
Total N
Location 3: max load 600 ton/day, average 300 (ton/day)
Total N at location 2 meets QCVN 08:2009, column B2

39. 3
RESULTS
Total P
Locations 1, 2: max load 38 (ton/day), average 22 (ton/day)
Total P at location 1 meets QCVN 08:2009, column A2

40. Total P at location 2 also meets QCVN 08:2009, column A23
RESULTS
Total P at location 2 also meets QCVN 08:2009, column A2

41. RESULTS 3 Total P Location 3: max load 1,7 ton/day,
average 1,4 (ton/day)
Total P at location 3 meets QCVN 08:2009, column B2

42. TSS in location 1 over QCVN 08:2009, column A23
RESULTS
TSS
Locations 1, 2:max load (ton/day), average (ton/day). In rainy season, TSS over QCVN, then DNR can not receive waste more.
TSS in location 1 over QCVN 08:2009, column A2

43. TSS in location 2 over QCVN 08:2009, column A23
RESULTS
TSS in location 2 over QCVN 08:2009, column A2

44. RESULTS 3 TSS Location 3: max load 3.200 ton/day,average 1.800 ton/day
TSS in location 3 meet QCVN 08:2009, column B2

45. Forecast for water quality3
RESULTS
Survey
Location
Location information
Forecast for water quality 1
Thien Tan water supply plant, Vinh Cuu district.
Water quality will be suitable for water supply after treatment. However, from Jun to Aug, TSS over QCVN 08:2008/BTNMT, column A2. 2
Dong Nai river lower, near Dong Nai bridge, Bien Hoa city. 3
Dong Nai river lower basin, Nhon Trach district.
Water quality meet a standard for navigation and aquaculture (QCVN 08:2008/BTNMT, column B2)

46. Partition for waste water receiving3
RESULTS
Partition for waste water receiving
Region 1: From Tri An Lake outlet to Dong Nai bridge (1 km from Dong Nai bridge towards DNR lower)
BOD ton/day.
COD ton/day
TSS ton/day
Total N 600 ton/day
Total P 22 ton/day
Region 2: From Dong Nai bridge to DNR lower basin
BOD 500 ton/day
COD 900 ton/day
TSS ton/day
Total N 300 ton/day
Total P 1,4 ton/day

47. Management solution and protection3
RESULTS
Management solution and protection
Licensing
Rely on water resource planning and maximum load for each sector after modeling to license waste water release.
Partition of water utilization for licensing water exploitation.
Controlling
Promote the environmental monitoring, set up more automatic monitoring stations to strengthen forecast exactly for water resource management.
Pushing water recycling and reusing after treatment.
Broadcasting
Inform water quality forecast for communities to promote environmental protection awareness.

48. Management solutions for water resources3
RESULTS
Management solutions for water resources
Solutions for inter-region management
Monitor waste sources in provincial boundary
Share information with nearby provinces about waste sources to DNR basin
Unite the water using purpose and quality standard for waste water release among provinces

49. 4
CONCLUSION
Sector 1, Sector 2 satisfies the quality of domestic water supply.
Sector 3 basically meets the quality of domestic water supply. However, in rainy season (April to November), DNR water quality decrease.
Sector 4 meets the quality for agricultural drainage and aquatic conservation.
Present water quality
Waste water from industrial zones and Bien Hoa city release directly to DNR.
Flow to DNR about m3/day.
Present loads
Flows to DNR increase up to 2020 about 278% in comparison to 2013.
Waste loads to DNR also increase because of economic development.
Forecast for loads

50. Water quality forecast4
CONCLUSION
Water quality of DNR from Tri An Lake outlet to Dong Nai bridge satisfy the QCVN for domestic water supply.
TSS always meets QCVN 08:2008/BTNMT. However, in rainy season, TSS is over QCVN 08.
Water quality forecast
From Tri An Lake outlet to Thien Tan water supply plant and DNR lower basin (1 km from Dong Nai bridge) can receive average maximum loads: BOD ton/day, COD ton/day, TSS ton/day, total N 600 ton/day and total P 22 ton/day.
Location 1 km from Dong Nai bridge to DNR lower basin can receive average loads: BOD 500 ton/day; COD 900 ton/day; TSS ton/day; N 300 ton/day; P 1,4 ton/day.
Receiving partition

51. 4
CONCLUSION
Set up model of forecast for some parameters such as DO, ammonia, turbidity
Build up some scenarios in forecast process to determine the water quality for other purpose.
Calculate more some parameters in rainy water, Collect more data from industrial zones of Binh Duong province and Ho Chi Minh city.

52. Set up model for plant coverage in DNR basin4
CONCLUSION
Set up model for plant coverage in DNR basin
Calculate more some parameters in agriculture productions directly affecting to streams going down to DNR
Combine SWAT model to MIKE 11 model to overall assess water quality and receiving capacity of waste water by DNR

53. THANK YOU!