QUESTION $1$

In the NRCS Method for determining excess precipitation for a particular location and storm event curve numbers $($CN$)$ are assigned based on land use type. The higher values for CN produce more excess precipitation.

True

False

QUESTION $2$

A $215-$acre site has the following land cover types$/$hydrologic conditions. What curve number $($CN$)$ should be used for the entire site to determine excess precipitation using the NRCS method?

Land Cover Type $1$ has an area equal to $61$ acres and has a CN of $30.$

Land Cover Type $2$ has an area equal to $55$ acres and has a $CN$ of $48.$

Land Cover Type $3$ has an area equal to $17$ acres and has a CN of $91.$

Land Cover Type $4$ has the remaining area not covered by Types $1,2,$ and $3$ and has a CN of $67.$

QUESTION $3$

For some location in the US$,$ an NRCS Type I rain storm has a $24-$hr precipitation value equal to $2\mathrm{.}3$ inches. Find the NRCS$,$ total direct runoff for a soil with a curve number $($CN$)$ equal to $81$ at $t=10hrs$ during this storm.