Lecture 14 drainage 2 Flashcards
1
Q
filed ditches characteristics
A
coolection of water in field towards collector drain vegetated shalow slope v shape of trapezoidal may need reshapping after tillage
2
Q
lateral and amins
A
conveyeance f water towards outlet
steeper slopes
unvegetated
3
Q
three types of open drainage systems
A
random
parallel
cross slope
4
Q
what is random
A
work with the topographyh
5
Q
difference between parallel and cross slope
A
parallel- completely straight
cross contour, follow cocontours, but still parallel
6
Q
three ways to calculate design flow
A
rational method
flood frequency analysis
scs curve number
7
Q
four things to design for a channel
A
design flow water surface elevation (root zone cap rise etc) side slopes flow velocity depth (free board, subsidence etc)
