Problem $1$: Curve Numbers and Unit Hydrograph $(20$ pts$).$ You are doing a project calculating flooding in an industrial Problem $1\mathrm{.}4(7$ pts$)$: Your engineering firm has determined a unit hydrograph for your watershed, given in the table

below:

Using the effective precipitation found in Problem $3,$ apply this unit hydrograph to find the direct runoff hydrograph.

Create a table that shows the runoff values, in cfs$,$ as a function of time. Also provide a plot of streamflow as a function

of time. Assume no baseflow.

Problem $1\mathrm{.}5(1$ pt$)$: Analyzing the graph made in Problem $4,$ at which hour does the peak streamflow occur?

Problem $1\mathrm{.}6(3pt)$: What percentage of the flow amount from the rain event at $t=3$ hours is from rainfall that occurs in

the first hour?

area. The swampy soil conditions indicate that AMC III is appropriate for all Curve Numbers.

Your engineering firm has determined the following land use categories at the site:

Problem $1\mathrm{.}1(3$ pts$)$: Calculate a curve number for the site $($make sure to consider AMC$).$ You will need to use a weighted

average calculation to consider the different soil types and land uses.

Problem $1\mathrm{.}2(3$ pts$)$: Using what you know about Curve Numbers, would the curve number increase, decrease, or stay

the same, if the entire site was HSG A$?$ Explain why.

Problem $1\mathrm{.}3(3$ pts$)$: You are analyzing a severe storm that had large amounts of rainfall over the course of $3$ hours.

Determine the effective precipitation for each of these rainfall amounts. In your calculation, use the Curve Number you

found in Problem $1\mathrm{.}1.$ Note that here you will be using different values of la$,$ as noted in the table:Problem $1$: Curve Numbers and Unit Hydrograph $(20$ pts$).$ You are doing a project calculating flooding in an industrial

area. The swampy soil conditions indicate that AMC III is appropriate for all Curve Numbers.

Your engineering firm has determined the following land use categories at the site:

Problem $1\mathrm{.}1(3$ pts$)$: Calculate a curve number for the site $($make sure to consider AMC$).$ You will need to use a weighted

average calculation to consider the different soil types and land uses.

Problem $1\mathrm{.}2(3$ pts$)$: Using what you know about Curve Numbers, would the curve number increase, decrease, or stay

the same, if the entire site was HSG A$?$ Explain why.

Problem $1\mathrm{.}3(3$ pts$)$: You are analyzing a severe storm that had large amounts of rainfall over the course of $3$ hours.

Determine the effective precipitation for each of these rainfall amounts. In your calculation, use the Curve Number you

found in Problem $1\mathrm{.}1.$ Note that here you will be using different values of la$,$ as noted in the table: