Water Quality Assessment, Assignments of Environmental Science

Download Water Quality Assessment and more Assignments Environmental Science in PDF only on Docsity!

Water Quality Assessment of Lakes

in Yangon

Cho Cho Thin Kyi, Theingi Ye Myint, Phoo Ei Soe, Shwe Yee Mon Mon

Yangon Technological University

Outlines Introduction Problem Statement Water Quality Parameters Results and Discussion Conclusions

Kandawgyi Lake Inya Lake

Kandawgyi Lake  popular recreational area  Catchment area : 1.421 km

 Water surface area :160 acre (65 Ha)  Average Depth :6 ft  Maximum Depth : 12 ft

 Algae blooming

Inya Lake  Popular recreational area  Distribute to Kandawgyi Lake  Catchment area:3 sq-miles  Water surface area:1.5 sq miles  Water holding capacity : 4000 MGal

Parameters to be analysed

• Temperature
• Chemical oxygen demand
• Biochemical oxygen demand
• Total alkalinity
• Total solids
• Total suspended solids
• Total dissolved solids
• Nitrogen ( NH 3 + NO 3 )
• Phosphorus

Location of Inlets and Sampling Stations

Temperature Variations

temperature (

C)

station number

Sep

Oct

Nov

Total Suspended Solids

suspended

solids

(mg/L)

station number

Sep Oct Nov INWQS

Total Dissolved Solids 0 100 200 300 400 500 600 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23

total dissolved solids(mg/L)

station number Sep Oct Nov

Oxygen Demand (a) COD concentration Of Kandawgyi Lake (b) BOD concentration Of Kandawgyi Lake 0 500 1000 1500 2000 2500 3000 1 2 3 4 5 6 7 8 9 1011121314151617181920212223 COD (mg/L) station number Sep Oct Nov INWQS 0 100 200 300 400 500 600 700 800 900 (^1234567891011121314151617181920212223) BOD(mg/L) station number Sep Oct Nov INWQS

Nitrogen Concentration(NH3-N+NO3-N) for recreation 0 10 20 30 40 50 60 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 NH

• N+NO
• N (mg/L)

station number

Sep Oct Nov INWQS

Phosphorus concentration for recreation 0

phosphorus (mg/L)

station number

Sep Oct Nov INWQS

Phosphorus Concentration

It compared with the limit for eutrophic state (0.02 mg/L) of a lake in New York

(source: NYS Citizens Statewide Lake Association Program, 2006).

0

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23

phosphorus (mg/L)

station number Sep Oct Nov limit for eutrophication