IEEE Spectrum June, 2010 - 41

central route

Length
1415 kilometers

shrinking sourCe
The source of the central
route, the Danjiangkou
Reservoir, has reportedly
shrunk due to decreased
flow from the Han River.
To enable it to send more
water north, Danjiangkou is
being expanded to a storage
capacity of 29 million
megaliters. This would
mean raising the water level
from 157 to 170 meters and
relocating 330 000 people
who live or work in the
floodplain. But increasing
the reservoir's size won't
make more water flow into
it from the Han.

enD:
Beijing
PoPulation:
22 million

enD:
tianjin
PoPulation:
12 million

Hai
river

throughput
12-14 million ML/year
ConstruCtion
period Began 2003;
missed targeted 2008
and 2010 completion;
rescheduled for 2014

ow
ll r
Ye ive
r

energy Consumed
0 megawatt-hours
(gravity powered)
Latest news
As of February, 4500
residents had been
relocated to make way
for reservoir expansion.
The relocation is set to
be completed by 2012.

Water is pumped
between the Yangtze
and Yellow rivers,
crosses under the
Yellow, then flows by
gravity into Tianjin.

Yellow
river
Ninety percent of the
eastern route travels
through existing waterways, which are polluted
by industrial waste.

Start:
Danjiangkou reservoir,
Hubei Province

Huai
river

Ya
r i ng
v e tz
r e

Start:
Yangtze river,
Jiangsu Province
three gorges
Dam

The Three Gorges Dam
may need to help feed
the central route to
bolster the dwindling
Danjiangkou source.

eastern route
dirty water
and desaLination
Tianjin has reportedly refused
to accept water from the
eastern route, claiming that
it will be too polluted. The
city has instead invested
in seawater desalination,
which now supplies it with
200 megaliters of freshwater
per day; this amount should
rise to 500 ML within five years.
Desalination could be cheaper
than eastern route water;
according to officials, it costs
about 5000 yuan (US $732) per
megaliter to desalinate water
in Tianjin, while estimates for
the piped water are about
18 000 yuan per megaliter.

spectrum.ieee.org

Shanghai

Ya
r ng
iv t
er ze
Hangzhou

Length
1156 kilometers
throughput
14.8 million ML/year
ConstruCtion period
Began 2002; missed
targeted 2007 completion;
rescheduled for 2013
energy Consumed
8.9 million MWh/year
from 30 pumping stations
between the Yangtze
River and the Yellow River;
0 MWh/year from the
Yellow River to Tianjin
(gravity powered).
Latest news
In March, the first
585-meter-long tunnel for
crossing under the Yellow
River was completed.

june 2010 * Ieee Spectrum * nA

41



http://spectrum.ieee.org

Table of Contents for the Digital Edition of IEEE Spectrum June, 2010

IEEE Spectrum June, 2010 - Cover1
IEEE Spectrum June, 2010 - Cover2
IEEE Spectrum June, 2010 - 1
IEEE Spectrum June, 2010 - 2
IEEE Spectrum June, 2010 - 3
IEEE Spectrum June, 2010 - 4
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IEEE Spectrum June, 2010 - 80
IEEE Spectrum June, 2010 - Cover3
IEEE Spectrum June, 2010 - Cover4
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