I CH C H NG CHI
Nguy 1
T
K t qu quan tr c ch s ch t ng c h ng Chi c 2020 theo chu n Vi t Nam hi n nh n th y: ch t ng c h ng Chi c ch u ng nhi m c a 7 ch s : pH, BOD5, COD, DO, PO43-, Coliform, E. Coli. T c tr
WQIt ng = 74,2 ch ng t ch t ng c h ng Chi c m c trung h p v i
m c i
T H ng Chi c, ch t ng c h , h th . 1. T V N
110832m2
2. I NG, CH T C U
u v qui tr nh l y m u
M u c h ng Chi c c l y theo c c n Vi t Nam hi n h nh [1,2].
y m c m
hi n th ng. T i th m l y m u h ,
-10mm. M c l y b ng d ng c l y m ng. M u t
h p theo chi c l y t 08 v
v y m ng nhau, kho ng 2m.
1 gmail.com
:
chun
.
u
s ch c th c hi n t
d ch v k thu ng ch c Chi c
ng ch i t c ti
ng d n c n Vi ng [3,4,5,6,7,8]. C th i b ng 1.
B ch c h ng Chi c
TT Ch s nh
1 pH TCVN 6492:2011 [3].
2 TCVN 7325: 2004 [4].
3 BOD5 (20oC) TCVN 6001-1:2008 [5].
4 COD TCVN 6491:1999 (ISO 6060:1989) [6].
5 E. Coli TCVN 6187-2:1996 [7].
6 Coliform TCVN 6187-2:1996 [7].
7 Phosphat (PO43- TCVN 6202: 2008 [8].
u
n tinh khi xu t x Trung Qu c
3. K T QU LU N
3.1. K t qu s m h ng Chi
B ng 2. K t qu s m h ng Chi
STT u 3 Gi
trung binh Gi
1 pH 7,2 7,5 7,4 7,37 WQI 100
2 DO mg/l 6,9 5,4 5,2 5,8 69.9
3 BOD5 mg/l 11,0 17,0 19,0 15,6 48.3
4 COD mg/l 16,0 22,0 24,0 20,7 65.5
5 E. Coli MPN/100ml 0 0 0 0 100
6 Coliform MPN/100ml 4 5 6 5,0 100
7 PO43- mg/l 0,16 0,23 0,25 0,21 71.6
3.2. K t qu ch s WQIt
K t qu ch s WQIt
n
pH
2 2) cho
5
5
ung
= 5
k t qu quan tr s ch c h ng Chi c nh n
th y: H ng Chi c m c c i t o l d ng, ng th i
t v u nhi c c a ho
c t t s h trong t [11].
Tuy v c h ng Chi c v a h p v i
m
4. K T LU N
K t qu quan tr c ch c H ng Chi h
WQIt = 74,2 ch ng t ch c h ng Chi c m p v i
m
LI U THAM KH O
[1] T ng c ng (2015), QCVN 08-MT:2015/BTNMT quy chu n k thu t qu c
gia v ch c m t, B i.
[2] T ng c ng Ch ng (2016), TCVN 6663-3:2016 (ISO 5667- 3:2012) - Ch c - L y m u, ng d n b o qu u, B Khoa
h i.
[3] T ng c ng Ch ng (2011), TCVN 6492:2011 - Ch ng
c - nh pH, B Khoa h i.
[5] T ng c ng Ch ng (2008), TCVN 6001-1:2008 (ISO 5815-
1:2003) v Ch c - nh nhu c
Khoa h i
[6] T ng c ng Ch ng (1999), TCVN 6491:1999 (ISO 6060:1989)
Ch c - nh nhu c c (COD), B Khoa h ngh
[7] T ng c i. ng Ch ng (1996), TCVN 6187-2:1996 (ISO 9308/2:
1990 (E)) v ch c - nh - m vi khu n coliform - Vi
khu n coliform ch u nhi nh, B Khoa h
[8] T ng c i. ng Ch ng (2008), TCVN 6202:2008 (ISO 6878 :
2004) v Ch c - nh phospho -
molipdat, B Khoa h i.
[9] T ng c ng (2019), ng d n k thu Ch s ch t
c Vi t Nam, B i.
[10] T ng c ng (2015), QCVN 08-MT:2015/BTNMT quy chu n k thu t qu c
gia v ch c m t, B ng i.
[11] Nguy , i ch c h
, u khoa h c c ng Y
t .
ASSESSING AND CLASSIFYING WATER QUALITY OF DONG CHIEC LAKE, THANH HOA CITY IN 2020
Nguyen Van Lien
ABSTRACT
Results of environmental monitoring of water quality indexes for Dong Chiec Lake, Thanh Hoa City in 2020 to guide the Vietnamese Standards current the result are as follows:
The water quality of Dong Chiec Lake is polluted because of 7 index: pH, BOD5, COD, DO, PO43-, Coliform, E. Coli. Based on the results of the measurements, we obtained the overall WQI value = 74.2, proving that the water quality of Dong Chiec Lake is moderately suitable for irrigation.
Keywords: Dong Chiec Lake, the water quality of lake, lake in urban.
3/3 24/3/20
