Abstract:
Construction
of
the
proposed
Isiolo
Dam
in
the
Ewaso
Ng’iro
River
has
been
identified
by
Kenya’s
National
Water
Conservation
and
Pipeline
Corporation
as
necessary
to
improve
local
livelihood
by
providing
water
for
domestic
and
livestock
use,
small
irrigation
activities,
and
in
the
future,
for
tourists
in
the
proposed
Isiolo
Resort
City.
However,
there
has
also
been
opposition
to
the
proposed
construction,
on
the
grounds
that
the
dam
will
expose
herders
downstream
to
drought,
negatively
affect
endangered
wildlife,
and
put
the
local
wildlife-‐tourism
based
economy
at
risk.
The
Ewaso
Ng’iro
Basin
Stakeholder
Forum,
composed
of
conservation
sector,
business
sector,
and
civil
society,
has
sought
further
understanding
on
the
risks
and
opportunities
related
to
the
project.
The
present
study
represents
one
such
effort,
in
which
the
Forum
engaged
Conservation
Strategy
Fund
(CSF)
to
conduct
an
initial
desk-‐based
study
of
potential
local
costs
that
could
be
caused
by
the
Dam.
Forum
members
provided
data
and
factual
input,
but
did
not
carry
out
analyses
or
take
a
role
in
generating
conclusions
or
recommendations.
The
study
focuses
on
the
area
downstream
of
the
dam,
but
also
quantifies
and
describes
several
important
economic
changes
upstream.
Specifically,
we
address
three
main
topics.
First,
we
quantify
change
in
water
supply
if
the
dam
is
built,
and
then
calculate
and
compare
this
to
demand
in
the
form
of
current
and
expected
local
water
use
for
agriculture,
livestock,
and
domestic
uses;
we
consider
historical
river
flow
data,
predicted
future
growth
in
water
demand,
and
several
river
flow
scenarios
following
construction
in
order
to
describe
the
magnitude
of
changes
that
could
be
expected.
Second,
we
quantify
the
impact
of
the
proposed
dam
on
the
daily
life
of
herders,
by
quantifying
their
expected
economic
losses
due
to
increased
incidence
of
drought
and
therefore
to
increased
livestock
mortality
and
distance
to
water
sources.
Third,
we
evaluate
the
economic
impact
of
the
proposed
dam
on
the
existing
wildlife
tourism
sector,
considering
first
the
adverse
effects
on
wildlife
from
the
project,
and
the
decline
in
the
number
of
tourists
due
to
a
decline
in
the
willingness
to
pay
for
wildlife
viewing.
These
results
are
necessarily
simplified,
and
do
not
take
into
account
complex
but
potentially
significant
ecological
changes
and
their
additional
impact
on
herders,
wildlife,
and
wildlife
tourism.
However,
the
analysis
included
here
within
the
constraints
of
a
desk
study
suggest
that
negative
local
economic
impacts
may
be
severe,
in
turn
suggesting
that
in
depth
analysis
of
local
ecological
and
economic
impacts
is
merited
prior
to
proceeding
with
the
project.