$19$:$28$

all $5$G $$

Mentioned four hydraulic works that require river engineering for their design. $(1$ p$)$

$2.-$ What is the recommended radius of curvature for a river bend to be mo:phologically stable? $(1$ p$)$

$3.-$ Calculate the section of a rectangular channel so that it is morphologically stable, if the bed material is sand with an average diameter of $1mm$ and a flow rate of $200m\frac{3}{s}$ is required to pass with a bottom slope of $0\mathrm{.}5/1000.(2$p$)$