26 7 9

5km

A=3.3km2

1/2

55mm(17:00 18:00) 101.5mm(7 9 )

0.620.77 0.97 1.06

2,880m3

0.74 0.2616,000

A(km2)Vg(m3) 1)

Vg=1,000A Vg=100A

(m2) (m3/100m2) (m3) (m3) (m3) ( ) ( ) ( )

Vg N

(m3/ )

A(km2) N( )2)

N=5,000A

10cm

(0.74:0.26)

2

Case1.430m3

Case2.766m3

15 27%

Case1 Case2

A(km2)2)

90%

1) ( )12 7 2)

(183),p71-156, 1991-03

(m2) (m) *0.74 *0.26

(m3)

Case1

Case2