ch.6
ch.6VI.1 , . BOD .1) , .
2) BOD .1) .
, ( ) ( ). .
.
x C . . (1) , .
, .
2) (1) .
BOD / ln y / x . . , BOD . . Excel Regression() .
VI.2 Excel BOD . 0.4 ms-1 , x=o , BOD . km BOD .
VI.3 , ().1) , , 1 .2) , . ( .)1) . , , . (=) , . .
, ks 1 , , , .
2) Vollenweider ( ) .
, (Qin=Q). , .
.
, . .
.
VI.4 Develope the governing equations of Streeter-Phelps model and derive the solution. What is the critical D.O. deficit and distance?(Streeter-Phelps . .)
Integration factor method can be described as follows :where1) 1925, Streeter and Phelps sag curve . (BOD) , Streeter-Phelps , . BOD , 1 . , , 1 .
, L = BOD , = , = 1 ( ). , .
.
CBOD DO .
, C = , L = BOD , = , ML-3, = 1 . .
Streeter-Phelps , BOD DO . , BOD BOD (L) , L DO , .
BOD (1) (2) . :
(1)
(2) DO .
.
, ; q(t) ; y ; t . , .
.
1, , , BOD , . .
Streeter-Phelps D.O. sag curve, : BOD . : D.O. , . : D.O. sag curve .
2) ( ) ( ), , ( )( ) 0 . , .
, , .
, .
, ( ) .
x = 0 0 (D.O. ), .
VI.5 , . . . ( 6.)
. . (3M) (10) , . 1.
Sample 25g (0.85%) 225ml 1 Sample .
([3M Petrifilm]) () , ,
.
.
VI.6 BOD DO , DO . .
(63a) - , (63b) . (74a) L , .
Streeter-Phelps (34) . DO (DO "sag" ) Streeter-Phelps , CBOD . 6.5 ( ) CBOD( ) . .
VI.7 , , , , , , DO . DO .CBOD( ), NBOD, , , CBOD , , SOD DO . DO .
, .
.
, CBOD , NBOD, , , BOD( ) . . .-
VI.8 .
VI.9 , , . , , .
Fick 3 .
C : D: tensor V: vectorS : t : :
, , .
,GL= (g/m3.day)GB= , , , (g/m3.day)GK= (g/m3.day)
Network Box 3 (WASP5 ) , .
. (Taylor, 1956).
, r , u* , . t ( ) p ( ).
Elder(1959) Taylor(1956) .
, : (m2/day) : : Manning : (m/sec) : (m)
Recommended