0. median =100 cfu/100ml avg. 567 cfu/100ml 2010
TRANSCRIPT
.0
400
500
600
700
800
900
1000
1100
Co
nd
ucti
vit
y (
uS
iem
en
s)
0 10 20 30 40 River Mile
Great Miami River Cond.
0
500
1000
1500
2000
2500
3000
Co
lifo
rms #
/100 m
l C
FU
0 5 10 15 20 25 30 35 River Mile
Great Miami River CFU/100 ml
Median =100 cfu/100ml
Avg. 567 cfu/100ml 2010
0
20
40
60
80
100
120
140
Tu
rbid
ity N
TU
0 10 20 30 40 River Mile
10101011
9
109
4
8
3
11
5
79
91111
9
6
1010
3
4
8
6
7
5
9
11107
6
8
1011
9
85
710
5
4 4
4
Great Miami River Turbidity
7.4
7.6
7.8
8
8.2
8.4
8.6
8.8
9
pH
un
its
0 10 20 30 40 River Mile
10
1010
11
9
10
9
48
3
115
7
99
11
11
9
6
10
10
3
4
8
6
7
5
9
11
10
7
6
8
10
11
9
8
5
7
105
4 44
Great Miami River pH 2010
-0.5
0
0.5
1
1.5
2
2.5
3 To
tal P
(m
g P
/l)
0 10 20 30 40 River Mile
Great Miami River TP 2010
0
0.5
1
1.5
2
2.5
3 T
P c
on
c.
(mg
P/l
ite
r)
0 2000 4000 6000 8000 10000
Discharge (cfs)
Great Miami River TP x cfs 2010
Particulat TP
0
2
4
6
8
10
12
14 N
itra
te-N
( m
g N
/l)
0 10 20 30 40 River Mile
Great Miami River NO3-N
0
5000
10000
15000
20000
25000
TP
lo
ad
(kg
TP
/riv
er-
day)
0 10 20 30 40 River Mile
Great Miami River TP budget
Summary
1. pH is elevated to extremes by severe suspended algal densities avg. pH = 8.4 (max 8.84 units).
2. Total Phosphorus Is low, avg 0.27 mg P/l, less than 0.3 mg/l targeted for urban rivers by OEPA.
3. Nitrate was high ~ 4.0 mg N/l, max 13 mg N/l from row crops.
4. N:P molar ratio was 18:1, > Richardson ratio of 14, with excess N. Algae likely P-limited.
5. Conductivity = 673 uS, max 1084 uS about normal for limestone bedrock.
6. Fecal coliforms = median 100, avg. 567, max = 14700 polluted.
This Year March to Nov.
• Pick some sites of interest to you.
• Get two bottles per site tonight and site descriptors.
• Join us on 3rd Sat. of each month at 10:00 am for sample turn in and analysis. We will train you.
What’s New for 2011?
• We have received an equipment grant from Hamilton County Soil and Water District to buy all new meters and spectrophotometer, and supplies for 2011.
• We have applied for a public outreach grant from the same source to expand the public’s awareness of the watershed and its health.