Table $2$ below contains data showing the response of two

drainage basins $($or river catchments$)$ to identical storm events

$($i$.$e$.,$ the storms produced identical amounts of rain at identical

rates for identical lengths of time$).$ These drainage basins are

roughly the same size but their characteristics $($e$.$g$.,$ soils,

vegetation, land use, topography$)$ differ in some way. Plot the

data in Table $2$ on a graph paper or use Microsoft Excel, or

SPSS$,$ etc. to create a hydrograph for each drainage basin. The

two hydrographs should be on the same graph, and they

should begin at the same point in time. Be sure to include

title, axis labels, and label peak discharge, rising limb and

recession limb$.(9$ marks$)$

a$)$ What is the peak discharge $(m^3{s}^{-1})$ for:

Drainage Basin A$?$

mark$)$

$(1$ mark$)$

b$)$ Assume a storm peak at time $2\mathrm{.}5hrs.$ Determine the two lag

times. Show all work. $(5$ marks$)$

c$)$ Which drainage basin experiences a longer lag time?

$(1$ mark$)$

d$)$ Based on your interpretation of the two hydrographs answer

the following questions:

i$.$ How might vegetation characteristics differ in these two

drainage basins?

$(2$ marks$)$

ii$.$ How might topography differ in these two drainage basins?

$(2$ marks$)$

iii. What kinds of land use might produce a hydrograph like

drainage Basin A$?(2$ marks$)$

iv$.$ What kinds of land use might produce a hydrograph like

drainage Basin B$?(2$ marks$)$

e$)$ Define a flood. Which basin has a greater flood hazard risk?

Why?