E. LAKE WATER QUALITY (Q)

E1 TRANSPARENCY [m]

SITE: Near the dam
YEAR: 1982-1984


E2 pH
Month         Jan       Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
------------------------------------------------------------------------------------------------------------------
Depth [m]
   0	      7.1	7.1	7.2	7.7	8.2	8.2	8.2	8.2	8.3	7.3	7.1	7.1
  M*1	      7.0	7.1	7.1	7.1	7.0	7.1	7.0	6.9	6.9	7.0	7.0	7.0
  B*2	      6.8	7.0	7.0	6.9	6.8	6.7	6.6	6.6	6.6	6.6	6.6	6.6
*1 Middle. *2 Bottom.


E3 TURBIDITY [mg l-1]
Month         Jan       Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
------------------------------------------------------------------------------------------------------------------
Depth [m]
   0	      7.2	4.3	2.8	2.1	1.3	0.8	0.7	7.4	2.2	10.3	25.6	9.7
  M*1	      9.9	5.8	3.9	2.7	2.0	1.7	1.2	65	97	76	15	13
  B*2	      25	12	7.8	21	11	9.8	9.3	144	109	61	36	35
*1 Middle. *2 Bottom.


E4 DO [mg l-1]
Month         Jan       Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
------------------------------------------------------------------------------------------------------------------
Depth [m]
   0	      9.3	10.1	10.8	11.3	9.9	9.1	8.7	8.5	8.8	8.2	8.1	8.7
  M*1	      9.2	9.9	10.3	10.2	10.0	9.7	9.2	8.1	7.9	8.2	8.1	8.3
  B*2	      6.1	8.5	10.1	8.8	6.9	3.2	1.5	3.0	4.3	3.2	2.1	2.2
*1 Middle. *2 Bottom.


E5 COD [mg l-1]
Determined by KMnO4 method.
Month         Jan       Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
------------------------------------------------------------------------------------------------------------------
Depth [m]
   0	      1.4	1.2	1.2	1.4	1.6	1.5	1.5	2.1	2.2	1.9	1.9	1.5
  M*1	      1.4	1.2	1.2	1.1	1.1	1.1	1.2	4.0	4.0	3.3	1.6	1.6
  B*2	      1.9	1.4	1.3	1.8	1.7	1.9	2.2	6.6	4.7	3.4	2.7	2.8
*1 Middle. *2 Bottom.


E6 CHLOROPHYLL CONCENTRATION [micro l-1]
Month         Jan       Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
------------------------------------------------------------------------------------------------------------------
Depth [m]
   0	      2.8	9.2	23.6	55.8	68.9	87.7	77.2	57.2	74.5	31.1	13.8	8.0


E7 NITROGEN CONCENTRATION
NO3-N [mg l-1]

Month         Jan       Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
------------------------------------------------------------------------------------------------------------------
Depth [m]
   0	      0.68	0.37	0.47	0.53	0.35	0.38	0.38	0.42	0.50	0.45	0.43	0.38
  M*1	      0.47	0.42	0.47	0.55	0.37	0.38	0.45	0.68	0.33	0.47	0.53	0.28
  B*2	      0.95	0.45	0.45	0.57	0.38	0.48	0.58	0.70	0.32	0.47	0.63	0.72
*1 Middle. *2 Bottom.


E8 PHOSPHORUS CONCENTRATION
Total-P [mg l-1]

Month         Jan       Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
------------------------------------------------------------------------------------------------------------------
Depth [m]
   0	     .008	.007	.005	.005	.003	.000	.002	.006	.028	.020	.018	.011
  M*1	     .009	.006	.005	.004	.003	.001	.001	.020	.055	.038	.012	.013
  B*2	     .008	.012	.006	.020	.011	.018	.014	.049	.055	.050	.030	.031
*1 Middle. *2 Bottom.