Environmental Engineering Reference
In-Depth Information
Table 4.6 Characteristics of developed models for Zir-e-Pol station in out let of the Latian Dam
Na
+
Cl
Ca
þþ
Mg
þþ
Suggested
Model
ARIMA(2,0,0)(1,0,0)
ARIMA(2,0,0)(0,0,0)
ARIMA(2,0,0)(1,0,0)
ARIMA(2,0,0)(0,0,0)
Equation
Z
t
= 0.566 + (0.728(Z
t
−
1
)
0.151
(Z
t
−
2
). + a
t
)x(0.1407(Z
t
−
12
)+
Z
t
= 2.186 + 1.02(Z
t
−
1
)
0.338(Z
t
Z
t
= 1.035 + (0.9301(Z
t
−
1
)
0.309
(Z
t
−
2
). + a
t
)x(0.1251(Z
t
−
12
)+
Z
t
= 0.491 + 1.1(Z
t
−
1
)
−
−
−
ʵ
t
)
−
2
)+a
t
ʵ
t
)
0.3931(Z
t
−
2
)+a
t
−
AIC
178.19
193.26
139.59
247.83
−
−
SBC
−
163.46
204.38
154.32
−
236.78
R-Square
0.6
0.95
0.72
0.9
Std. Error
0.1772
0.3316
0.3042
0.1575
Intercept
0.5663
2.1862
1.035
0.4909
T
20.12
36.474
19.52
15.534
Prob > lTl
<.0001
<.0001
<.0001
<.0001
AR Lag1
0.7281
1.02
0.9301
1.105
T
12.484
18.697
16.682
20.558
Prob > lTl
<.0001
<.0001
<.0001
<.0001
AR Lag2
0.1513
0.3385
-0.3091
0.3931
−
−
−
T
−
2.605
−
6.1837
-5.543
−
7.317
Prob > lTl
0.009
<.0001
<.0001
<.0001
MA1
.
.
.
-
T
.
.
.
-
Prob > lTl
-
.
.
.
SAR
Lag12
0.14079
.
0.1251
.
T
2.399
.
2.1409
.
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