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