Download (2026Kb) - NERC Open Research Archive
Download (2026Kb) - NERC Open Research Archive
Download (2026Kb) - NERC Open Research Archive
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
t<br />
I<br />
'l<br />
t<br />
I<br />
I<br />
I<br />
I<br />
I<br />
I<br />
I<br />
t<br />
t<br />
I<br />
I<br />
I<br />
I<br />
7. VAIIIABI]E PROPORT:ONAI, IOSS (A)<br />
?hts nodel also allons the responge volume to Lncrease thlough<br />
the events; contrlbutinq atea remalns constant, rrhlle ploportlonal<br />
loss decreases through the event.<br />
Rafurfa11<br />
Intensity<br />
Fractl,on<br />
ehere ZO<br />
ZE<br />
i<br />
P<br />
of<br />
I<br />
Ioss, z, =<br />
l<br />
fraction<br />
c i.s a constant<br />
-li-<br />
*j'Yj<br />
zz+ lzo - zs).-g'J<br />
of, loss a! stalt of ralnfall<br />
of loss at edd of ratnfall<br />
Cont.<br />
area Contributing area =<br />
p- rehere p. is asount of rainfall in lth perlod At<br />
.nd p rs rhe torar rainfatt.<br />
Net ralnfall = Rainfall x (L.O - z.)<br />
J<br />
3 paraneter model : ZO, zE, o<br />
when volunes are forced, d is defined.<br />
8. VARIABLE PROPORT:ONAL LOSS (B)<br />
sane as for 7 except that contrlbuting area = total area<br />
.11<br />
paved area<br />
Rainfall<br />
Depth