$0\mathrm{.}4\mathrm{.}1$ Define in detail the terms "inlet control", "outlet control", "headwater", "head" and "tailwater" in relation to the flow of water through a culvert.

$10\mathrm{.}4\mathrm{.}2$ What are the three major factors which determine the type of flow through a alvert?

$10\mathrm{.}4\mathrm{.}3$ Discuss in detail four different types of flow through a culvert.