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