As shown in the figure below, a stream transects a rectangular construction site located in south$-$

central Virginia near Danville. On the east side of the site, the land slope is $1\%$ and on the west it is

$0\mathrm{.}5\%.$ Soils have a K factor of $0\mathrm{.}35.$ The site has been root$-$raked as part of clearing and the soil has

compacted somewhat following this procedure.

a$)$ How many tons of soil are delivered to the

stream if the site is in this cleared condition

between September $15$ and February $1?$

b$)$ How much reduction of soil loss occurs if $2$

inches of sawdust are disked into the soil across

the site?