Post on 07-Jan-2017
Long Term Water Temperature Modelling for Fish Habitat
Paper 9213rd International Conference on Current & Future State of Water
Resources and Environment Chennai, India
January 6, 2010
Syed M. A. MoinInternational Joint Commission
Study Purpose To examine long-term data series of
water temperature, from which fish habitat and season variability can be characterized
Also required: synthesis for discharge in tributary streams
and air temperatures
Study Area
Study Area
Figure 3
Key Locations in Study Area
Calibration data availableLocations where water temperature needed
Governing Equations
0
q
xQ
tA
0)()(
fo SSgAxygA
xQV
tQ
𝜕𝑇𝜕𝑡 +𝑢𝑥 𝜕𝑇𝜕𝑥 = 𝑞𝑛𝑒𝑡𝜌𝑤𝐶𝑠𝐴𝑉 (3)
𝑞𝑛𝑒𝑡 = 𝐾(𝑇𝑒 −𝑇) (4)
Solution Procedure Hydrodynamics engine based temperature
model St. Venant’s equations solved by linear finite
elements – FERNS Routines added to FERNS for the solution of
Temperature conservation equation
Key ElementsVelocity, depth, flow fieldsTemperature computations for:
Main stem, tributaries &Embayment
Four-day average air temperature as inflow water temperature
Daily air temperature
Model Features226 nodes, tree based network Cross-sections defined as x-y coords (up to 600
points)3-hour & 24-hr time stepPredictor-corrector hydraulic solutionRunge-Kutta explicit temperature solution at
60 & 150 sec. time steps
Analytical StepsData collection
Hydraulic & channel geometry Water levels at the outletWater temperatures – air and waterWater supplies into the Bay of Quinte
Data synthesisFive running average air temperature to surrogate
water temperaturesRegional and Net Basin Supplies analysis to map and
extend tributary flows
0
5
10
15
20
25
30A
pr 1
8
Apr
25
May
02
May
09
May
16
May
23
May
30
Jun
06
Jun
13
Jun
20
Jun
27
Jul 0
4
Jul 1
1
Jul 1
8
Jul 2
5
Aug
01
Aug
08
Aug
15
Aug
22
Aug
29
Sep
05
Sep
12
Sep
19
Sep
26
Oct
03
Oct
10
Oct
17
Oct
24
Oct
31
Nov
07
Nov
14
Tem
pera
ture
Time
Napanee Offshore Calibration 2002
SimulatedObserved
0
5
10
15
20
25
30
Apr
/18
Apr
/25
May
/02
May
/09
May
/16
May
/23
May
/30
Jun/
06
Jun/
13
Jun/
20
Jun/
27
Jul/0
4
Jul/1
1
Jul/1
8
Jul/2
5
Aug
/01
Aug
/08
Aug
/15
Aug
/22
Aug
/29
Sep
/05
Sep
/12
Sep
/19
Sep
/26
Oct
/03
Oct
/10
Oct
/17
Oct
/24
Oct
/31
Nov
/07
Nov
/14
Tem
pera
ture
Time
Hay Bay Offshore
Simulated
Observed
0
5
10
15
20
25
30A
pr/1
8
Apr
/25
May
/02
May
/09
May
/16
May
/23
May
/30
Jun/
06
Jun/
13
Jun/
20
Jun/
27
Jul/0
4
Jul/1
1
Jul/1
8
Jul/2
5
Aug
/01
Aug
/08
Aug
/15
Aug
/22
Aug
/29
Sep
/05
Sep
/12
Sep
/19
Sep
/26
Oct
/03
Oct
/10
Oct
/17
Oct
/24
Oct
/31
Nov
/07
Nov
/14
Tem
pera
ture
Time
Spatial Temperature Variation
Node #6
Node #163
0
5
10
15
20
25Ap
r 15
Apr 3
0
May 1
5
May 3
0
Jun
14
Jun
29
Jul 1
4
Jul 2
9
Aug 1
3
Aug 2
8
Sep 1
2
Sep 2
7
Oct 1
2
Oct 2
7
Tem
pera
ture
Time
Outlet Temperature - 2001
ChuKingstonMoinObserved Conway