[GRASS-user] slope length from LS value

[Jáchym Čepický]

Hi,

"LS"= L*S
L="LS"/S

S you can obtain in parameter slope.steepness or

S=(0,43+0,30s+0,04s^2)/6,613
where
s - slope steepness [%]

L = (l/22.13)^p
where
p:
slope < 1%: p=0.2
slope 1-3%: p=0.3
slope 3.1-4.9%: p=0.4
slope 5-9.9%: p =0.5
slope >=10%: p=0.6

l - slope length [m]

so

l=L^(1/p)*22.13


why do you not try f.flow lgout=length

I hope, Helena will not complain too much

Jachym
2007/2/28, temiz <temiz at deprem.gov.tr>:
> hello
>
> how can I compute slope length (meter) from LS value ?
>
> regards
>
> --
> Ahmet Temiz
>
>
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-- 
Jachym Cepicky
e-mail: jachym.cepicky gmail com
URL: http://les-ejk.cz
GPG: http://www.les-ejk.cz/pgp/jachym_cepicky-gpg.pub