add discharge/channel width to crossings view

[smnorris]

From @NewGraphEnvironment

having width and mad in the crossing layer is really useful for our ability to screen sites when we are getting ready for the field and applying for permits

https://github.com/smnorris/bcfishpass/blob/dev/model/02_habitat_linear/sql/views/crossings_vw.sql

[NewGraphEnvironment]

currently the data does not seem to be coming through into the streams layer either

[smnorris]

Definitely something off in the db:

hillcrestgeo=# select count(*) from bcfishpass.streams where channel_width is not null;
 count
-------
     0

[smnorris]

Might as well add all these:

upstream_area_ha
stream_order_parent
stream_order_max
map_upstream
channel_width
mad_m3s

[smnorris]

gradient might be good too but that can wait until a function for calculating it is added.
smnorris/fwapg#142

[NewGraphEnvironment]

gradient is present in crossings and streams already. +1 Norris

[NewGraphEnvironment]

hmm. or perhaps it is a carry over from the segments before they are broken?

[smnorris]

Good point, it is already in the crossings table.
But yes, it is taken from the adjacent stream segment as a shortcut in lieu of a gradient at point function.