TRIBUTARY
RIVERBED
ESTUARY
MEANDER
SOURCE
A
I
G
A
C
C
T
I
K
E
R
O
G
N
Y
A
J
W
A
I
Z
I
J
C
R
R
I
V
E
R
B
E
D
X
X
A
A
H
Q
D
H
E
G
O
I
V
D
T
K
E
E
M
X
Y
I
D
J
E
U
S
O
C
E
R
G
U
M
Q
E
B
Y
I
R
A
B
L
B
P
O
E
I
L
O
U
N
E
P
C
U
O
F
R
F
T
O
D
Z
Q
X
E
X
I
T
S
P
S
E
N
U
A
G
F
N
E
A
A
X
R
K
I
Q
