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A simple device to never run out of water again | Zach Preston | TEDxChristchurch


Suzanne lives on Waikiki Island with the
beach of the golden in the Sun shines
bright and just like all the other
families in our community Suzanne’s
homes water is supplied by a water tank
but last summer she was one of the
hundreds that were hit with the severe
water shortage what little was left in a
tank didn’t last very long and she faces
sobering reality of having no water for
weeks it’s not just Susan either she is
one of the hundreds of south of New
Zealanders that rely on water tanks for
their fresh water supply and one of the
millions globally is even more frequent
droughts threaten what natural water
sources like wells and aquifers entire
communities are shifting to water tanks
as their means of natural water but they
had no real means of knowing how long
this will last for right now Suzanne’s
way of checking houseful attains this by
grabbing a ladder and peering into the
top understandably she doesn’t do this
all too often and therefore water tanks
running low her only way to get more
water is by a local phone call to a
local water supplier John and in the
heat of summer
John can’t handle hundreds of refill
requests at once which might mean
Suzanne will be a victim of being on the
weeks or even months long waitlist in so
many water shortages like the one faced
on Waikiki Island people don’t know what
is best to do because they don’t have
the knowledge to inform them but what is
Suzanne had a way of knowing exactly how
much water she had and how to use what’s
best of it what if John knew how much
water she had how much water the entire
island had it could use that to predict
shortages marks in advance
will you keep families like Suzanne’s
from running dry ever again so we’re
building a tool to do just that for me
seem to know a little solar-powered
device that monitors your water tank for
you you just put it on top of your water
tank
and now you can see how much what are
you using how much it’s costing you and
be alerted of leaks or other anomalies
but on a single isolated tank like
Suzanne’s we found that we can’t
actually do that much more systolic but
if she had a way of shearing this
knowledge to John he could have
transparency over a tank and automate
her refill process if everyone on
Waikiki Island knew and shared their
water level he could predict demand he
could optimize delivery routes it could
completely change how water is delivered
on the island all together from this we
learned that knowing how much water
Suzanne has helped Sudan but sharing
this knowledge that helps everyone so
how do we do this well it all starts
with sentinels little device on your
tank a sensor measures the height of the
water and this data is in sent via the
cellular network to the cloud we have
this data just a few meaningless ones
and zeros is in compared to the
dimensions of your water tank where it
is intended to information about your
water level at that moment in time this
information is great because what’s
enough of it
we can create knowledge about Susan’s
water tank knowledge that forms the
basis of the alerts and analytics that
keep her up to date knowledge that can
then be shared to her water supply John
and it’s more and more homes on Waikiki
gets him to know he can use this to keep
on top of refills and predicts potential
shortages to do this we use big data
gathered from water water tanks and this
is then used with our machine learning
models to predict events such as
shortages where big data just means the
more people that share their water level
the more accurate our predictions and
the more insight we can give to the
people that use this water daily this
isn’t just a story between John and
Susan either because with this knowledge
we can create entirely new conversations
with the water regulators the policy
planners civil defense farmers the list
goes on because we seem to know we can
create foresight and insight
all the stakeholders in this human water
cycle to act before disaster strikes our
ambition was Sentinel is to create
shared knowledge and make it accessible
to everyone
water is undoubtedly one of the most
valuable resources we have and the
pressure isn’t only being self on
Waikiki Island but if we can help all
the Susanne’s out there talk to all the
jeong’s and make the sharing of
knowledge the norm then maybe together
we can keep your taps and Suzanne’s
running fears to come so the next time
you see a water tank you’ll know that it holds knowledge worth sharing thank you
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