Compute the peak runoff rate $($m$3/$s$)$ that would occur once in $10$ years for a $10$ hectare catchment using the graphical peak discharge method. The stream is situated near your location, and has an average overland slope of $0\mathrm{.}5\%,$ a maximum flow length of $2000$ ft $(610$ meters$),$ an average slope of $0\mathrm{.}2\%$ along the hydraulic length, cultivated fields with a $30\%$ residue cover, and soils in Hydrologic Soil Group C$.$ Most of the flow path along the hydraulic length is a small stream with a sand and gravel bed, and $1\%$ of the watershed is swampy.