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