Our course explores what can be done to solve the complex problem that half a billion people worldwide do not have improved water supplies and two billion do not have improved sanitation. We look forward to you joining us. We want to help you develop the skills you need to address this major global challenge of the 21st century. Our course has informative video lectures and guest interviews with leading water policy scholars and practitioners. We will provide you with discussion forum topic prompts, which will invite you to engage with other learners from around the globe. Our MOOC will also ask you to attempt weekly quizzes and a challenging assignment that tackles a real water and sanitation problem in a difficult setting. Please watch this trailer: https://youtu.be/Q-HmaCZNd0k
Video 6.4: Changing Course
Loading...
En provenance du cours de University of Manchester
Water Supply and Sanitation Policy in Developing Countries Part 1: Understanding Complex Problems
79 notes
Explorer les vidéos de cours associées
Vous trouverez chez Coursera les meilleures vidéos de cours du monde. Voici quelques-unes de nos recommandations personnalisées pour vous
University of Manchester
79 notes
À partir de la leçon
Development Paths for Water and Sanitation Services
Rencontrer les enseignants
Prof Dale WhittingtonProfessor
Manchester Business School
Dr Duncan ThomasLecturer
Alliance Manchester Business School
In this video, we're going to look at examples of how the UK's water development
path changed course in the past and it pressures for it to change in the future.
This will help us emphasize that local conditions as well
as national and international aspects matter for a water development path.
We're going to talk about changes in the
organization of the U.K.'s water system, as well.
There has been consolidation and ownership changes with the U.K.'s water utilities
going from private ownership to public, and back to private again over time.
In other words, we'll be looking at both spatial
and temporal features of the U.K.'s water development path.
To illustrate how both of these aspects
matter in a water development path, let's look
away from the capital, London, for a moment,
which was the focus of our previous videos.
Now, we'll look briefly at Manchester here in the North of England.
Manchester seems to have followed a
similar water-first development path to London.
It even used the same approach of protected
and canalized spring water sources than aqueducts to
bring more rural water to the city as
demand for water increased
alongside increasing population and industrialization.
But in Manchester things happen later.
This variation of timing across two cities within
the UK, shows again that water problems are
largely local as we stressed back in week
one, when we covered basic facts about water.
Manchester's conduit was built around 1506.
It protected a natural spring and used stone
and wooden pipes to supply water to the city.
By around the 1770s, demand for water had increased to
such a point that the conduit supply was considered insufficient.
And also, the conduit itself had not
been well maintained apparently, the Manchester city authorities
and other in, early industrialists sought other
water sources from the outskirts of the city.
Water was pumped in from the nearby River Medlock.
Abandoned clay pits at Shudehill just go the north of
the city where filled to make simple reservoirs for this.
Like London, some richer households also had
a limited private water supply around this time.
We should also put things in context here by
noting that the average life expectancy around this time.
Say in the early 1800's was about 35 years.
The stone and wooden pipes that were put in from around the
16th century onward has actually been uncovered in the city of Manchester.
You can see some of them here in these photos
from over 100 years ago taken from the Manchester government archives.
On the left is a stone pipe on the right is a wooden one.
Both of these streets are only a short walking distance
from where we are here on the University of Manchester Campus.
By the time of the mid 19th century in Manchester, a reliable clean
source of water was important for
the booming textile industry among other things.
This was formally recognized in the 1844 commission
of inquiry into the health of large tans.
Like London's new river project, some two centuries early that we saw in
the previous videos, Manchester needed to get more water to support economic growth.
A consultant was employed by the city's council, the Manchester
corporation, in around 1846 to plan water resources for the city.
This resulted in a program of aqueduct
building to supply more water to Manchester.
First, a series of reservoirs and an aqueduct were built to bring in
water from the Pennine hills that lie fairly close to the east of Manchester.
Water from this project first arrived around
1851, but the project itself continued on well
into the 1880's, but this simply wasn't
enough water to keep pace with growing demand.
Where could more water be got?
Well, to the north of Manchester lay the English Lake District.
Three lakes there, Thirlmere, Hawswater, and Ulswater, were
all believed to be good, uncontaminated surface water sources.
Incidentally, once again reflecting unintended consequences theme from the
previous video on path dependency from the London Sewers.
These lake sources are now known to have some problems
with crypto Berdium, from live stock that graze near them.
Crypto can need removal with membrane filtration.
Of course, this wasn't all known about when
these sources were selected in the 19th century.
Next, and somewhat merging the similar, but up to
this point largely separate water development paths of Manchester
and London, an 1869 royal commission actually suggested the
Thirlmere Lake as a potential water source for London.
In other words, there was a kind of competition for water
sources to support industrialization and growth in London and in Manchester.
The cost of building a 400 or so kilometer aqueduct from
the north of England to London was simply too high, though.
This never happened.
However, in the process, the potential to
use Lake Thirlmere to supply Manchester was realized.
In spite of still significant cost implications, this is what happened.
Decision making was accelerated on this point, by reports in 1875 that
water demand in Manchester would outstrip supply in about just seven years.
So, in 1879 a special Manchester corporation water act
authorized this enormous project, which would build, at the time,
the largest aqueduct in the U.K. In this photo,
you can see the six-kilometer long stretch of Lake Thirlmere.
This was the source for the aqueduct.
Around 1885, it was dammed for the aqueduct construction to start.
Construction of the aqueduct took nearly 10 years, from 1885 to 1894.
The aqueducts length is over 150 kilometers, that's 90 kilometers
longer than the new river aqueduct we saw, that supplied London.
According to my colleague, Professor Roger Ford, the water on the aqueduct
makes about a one or two day journey to reservoirs at Prestwich.
A few kilometers northwest of the Manchester to city center.
The water comes by gravity flow, falling
about 30 centimeters per kilometer, flowing about 4
miles per hour, all by gravity flow, with no punts but siphons along the way.
The historical cost of this project was about 3 to 4 million British pounds.
That's around about 180 to 240 million pounds in 2011 prices.
In current money again, that equates to about
880 to 1,170 pounds per household if we
take the census data that shows around 205,000
households in the city of Manchester in 2011.
And actually, because of changes in population growth, there were,
probably a similar number of households in 1890's Manchester too.
Realizing the magnitude of this cost, incidentally, helps us understand
why, even though plans were made for additional water supplies
from other lakes in the Lake District, to meet demands
for water in Manchester, these did not happen right away.
For instance, Lake Ullswater was suggested for use in around about 1874 but was not
actually used for nearly another century until 1971.
Also in 1919, Lake Haweswater was authorized for use but building
work there had to wait until around about 1934 to 1941.
And the supply was not fully complete until 1955 because of World War II.
You'll recall the grand Roman aqueduct that
Dale showed in week one of the course.
The design of the Thirlmere Aqueduct differs from this.
That's because it's better to have the
water flowing in a protected channel whenever possible.
Probably at least partly underground.
The Thirlmere, a mixture of tunnels bored out of bare rock, some cast
iron pipes and so called cut and cover or infield sections were used.
Here, a channel would be cut out, the concrete
aqueduct section put in, then the soil replaced on top.
The photo here, from the time of the construction
of the aqueduct shows this cut and cover process happening.
It must have been extremely hard work, especially with
the kinds of tools you can see in this picture.
In other photographs from this period, I've also seen
that some rail track mounted drilling machines were used.
Once the aqueduct was complete, the arrival of its
water supply into Manchester was a cause for celebration.
The photo here shows the official opening
ceremony of the completed Thirlmere Aqueduct supply
into a commemorative temporary fountain in Albert
Square Manchester on 13th of October, 1894.
There is no permanent fountain near this
spot, a short distance from our university.
Although, it has been rebuilt and moved a few times.
Here is a photo of it.
The Thirlmere aqueduct like the large sewer building program in London in
the late 19th century also raises
issues of path dependency and long-term consequences.
The aqueduct raises the issue of once it's there, what can you do with it?
Thirlmere was expensive to build.
It can't easily be completely rebuilt or abandoned for another water supply.
Fortunately, it does still work well, but
it does require maintenance and repair now.
But it's perhaps surprising how little until recently the
aqueduct had been inspected to check on it's condition.
There were inspections in 2005, but the Thirlmere aqueduct was only shut
down for the first time since around about the 1950's in 2006.
This meant cutting off the water supply.
And in the case of Thirlmere, this
meant taking supplies from neighboring Wales instead.
It also takes about a day or so for the
water to empty out before the aqueduct can be safely entered.
Clean working conditions would also probably have to be
used for working in the aqueduct to avoid contamination.
There have now been annual shut downs since 2006.
And these cost around about 200 to 400 thousand British pounds each time.
When they happen, engineers improve ventilation in the
aqueduct, stop any outside water infiltrating into the aqueduct.
They also repair some of the structure, replace pressure relief valves, and so on.
The Grandon hillside, within which the cut and clear parts of
the aqueduct sit, also have to be checked for structural integrity.
In 2010, engineers had to glue
some hillside sections together to stabilize them.
This was done, as you can see in
the picture here, by injecting cement grout between rocks.
This part of the project was actually done at Nab Scar.
And that's the location we just saw in black
and white, for some of the original construction works.
This work was part of an overall six-year, 25-million
British pounds project to renovate and maintain the Thirlmere aqueduct.
From around this time, the development paths of Manchester and London take
on a more or less national character and less of a local one.
In other words, there's some convergence in the nature and timing of the path.
Manchester, at this time, like London, had
installed an interceptor seal this was in 1889.
In Manchester though, this was prompted by
commercial concerns to avoid pollution of the textile
industries export trade route of the Manchester ship
canal that went out to sea by Liverpool.
However, in another feature of the UK path that happened in
both London and Manchester, there was transfer of ownership from the
private to the public sector of the water supply, including consolidation
of the previous number of utilities into larger more centralized organizations.
On this aspect Manchester was first.
We saw in the earlier video that
private undertakings were also put into public ownership
under a more or less unitary London
authority in 1903, as the Metropolitan Water Board.
This fare was largely due to water quality concerns.
In Manchester, in 1808, the Manchester and Salford Water
Works Company had been formed as a private water supplier.
It was apparently owned by south
of England Gloucestershire based Stone Quarrying Company.
This waterworks company actually fitted its
own limestone pipes for the water supply.
Although, it was known that these pipes would burst under pressure.
And they did do so.
This lead to the company being handed over to a trust in 1815.
And to the use of cast iron water mains from around 1817.
In 1846, the city council, the Manchester corporation then
bought the Manchester and Sulfur Water company from the trust.
The photo here shows a cast iron water mains.
This one is being fitted in London in 1925.
But probably a smaller one would've looked similar to this in Manchester.
Across the UK and more specifically in England and Wales, by 1913 about
80% of the water and sewer sector
was in public ownership under municipal authorities.
This was after a period of private water supply companies in
both Manchester and for a longer period too, London as we've seen.
And there was still around 30 or so significant private water
supply companies at the start of the 20th century in the UK.
By 1989, the England and Wales Water Sector was 100% in the private sector.
After having undergone the
world's first full-scale, full-divestiture privatization.
Along the way, from 1945 to 1974 and for reasons that are not
entirely clear, other than a general move
toward more centralization, administration, and state control.
The number of public water supply authorities, under municipal authority
control, was consolidated down, from over 1000 to about a 150.
However, sewage disposal was still done by
about 1400 municipal sewage authorities at this time.
There are then, at least two other major organizational institutional
reforms, at this point in the UK water development path.
First, in 1963, municipal water supply functions were brought
under the control of 27 public sector river authorities.
These organized some of their operations around river basins.
Second, in 1973 to 74, in one of the UKs
other interesting firsts, full integrated river basin management was adopted
by the formation of ten regional water authorities that had
responsibility for both water and
sewage organized around river basement boundaries.
So, overall we have the U.K. pathier as being an emergence
of mainly private sector water companies first in the 19th century.
This was followed by nationalization or transfer of ownership
into the public sector in the early 20th century.
Then, this was followed, by a return to full
private sector ownership, by the end of the 20th century.
Albeit helped by the fact, that public reforms
up to this point, had created ten distinct
river based in structured water and sewers organizations
that could easily be sold as separate entities.
We're going to see, the capital expansion
details over this period, in the next video.
In that, we'll see a major different expenditure during the early 1970's to
late 1980's when some of this reorganization
around the other boundaries was taking place.
But for now, it's sufficient to say that the assets that
were sold by the time of privatization were in rather poor condition.
There was maintenance backlog, and sewer collapses were common.
Budgetary incrementalism or in other words the short term
horizon financial planning system in Governmental ministries or departments,
where they typically get their previous year's budget, except
for perhaps a small increment of upwards and downwards.
This had made large capital investments challenging.
It was also clear at this point that the Victorians, the
19th century installers of water and sewer systems, had built in overcapacity.
For some time, later generations had in a sense been somewhat free riding on
these investments, but now new investment for
network rehabilitation, replacements and expansion was needed.
But there was little political will to invest or
to raise water bills to allow this kind of investment.
Privatization was the eventual policy proposal to deal with this situation.
Regulatory systems would also have to be arranged as
the private water industry could not regulate it's self.
The River Water authorities were also concerned at this time, about
any lapse of the relatively
newly introduced, integrated river based management,.
We're going to look properly at privatization
around the world in our follow on Mook.
They will consider arguments and evidence for
and against this kind of institutional change.
Here, as we're looking at it from the perspective of the UK's water development
path, I simply want to give you an idea of the scale and costs involved.
First, to give you an idea of the scale of the infrastructure assets that
would have been involved in the privatization
part of the UK's water development path.
Let's take a look at the example of just one of the ten water utilities involved.
This is United Utilities, the now privatized
water utility that covers the area around
the area of Manchester and, in fact, the whole of the northwest of England.
United utilities is also the largest listed water company, with
a 2013 market capitalization of around five billion british pounds.
The area highlighted red here, on this map of
the UK, shows the area covered by United Utilities.
Again, that's the northwest of England.
And, remember that this is just one of ten major
water companies, each serving a region more or less like this.
And you can actually see the rough boundaries
of the other nine regions on this map.
Remember as I've said before, Scotland to the North is still
a public water system as is Northern Ireland of to the west.
Although, they are taking some of the features
from the regulation part of England and Wales.
You can see here the massive system scale that's involved.
And this is just one of the ten water companies that was privatized.
United Utilities has tens of thousands of kilometers of water pipes and sewers.
And over a thousand kilometers of aqueducts.
It has scores of water treatment works.
And hundreds of wastewater treatment works.
It's also a significant landowner.
The company serves about 7 million people or that's about 3 million households.
On top of that, it serves about 200,000 businesses.
Overall, it supplies nearly 2,000 megaliters of water a day.
So this now brings us to the issue of
what this massive asset base was sold for during
the water, UK's water development path when the whole
system was privatized in England and Wales in 1989.
What should it have been sold for do you think?
What is the right sale price here?
Well, the systems market value is not an easy matter to determine.
It was conditional upon on not entirely clear or transparent costs, apparently
need to meet incoming European water,
waste water, and environmental quality standards.
In political documents of this time, this was said to be
a cost of up to about 30 billion British pounds, but
very few details were given about what this level of investment
would achieve, or over what period it needed to be spent.
The system was also known to have an investment deficit,
but the exact size of that hadn't been unambiguously quantified.
Some idea of how the valuation worked has been traced by our University
of Manchester colleague, Professor Jean Chiule
in her published work on critical accounting.
These are the figures shown here.
First, of course, the sale price is known, and it was just
over 5 billion British pounds, but this was most likely an undervaluation.
Even taking the historic asset cost, that's the original cost at the time
that they were put in, the industry value was nearer nine billion Pounds.
Now, of course, the cost to replace the assets with the
same type, in 1989, would have been more like 34 billion Pounds.
Restructuring and selling the industry itself cost
more money about another 370 million Pounds.
The government in 1989 also wrote off nearly
5,000,000,000 pounds of outstanding debt, and gave a
1,500,000,000 pound cash injection towards the apparent eminent
30,000,000,000 pounds investment that was going to be needed.
This 1,500,000,000 billion pound cash injection was
called a green dairy for the sale.
Later, the National Audit Office, the body
here that scrutinizes public spending on behalf
of Parliament, revised the 34 billion replacement
cost valuation to more like 124 billion.
And I've also seen in later government policy documents
a figure of over 200 billion pounds for this.
There is still controversy in the UK about whether this privatization of the
England and Wales water industry was a positive or was a harmful step.
Following a manifesto committment, the new government in the UK in 1997 took a
windfall tax of just over 5 billion
British pounds across all the privatized utilities.
And about 1.7 billion was levied on the Water Industry, the tax
was payable in 2 installments; one in 1997, the other in 1998.
This apparently was done in response to a sort of general
view, that the prototype utilities had been sold off too cheaply.
Also in my research, I've seen that decisions and strategies
of the U.K. water companies; after privatization were seen as problematic.
Water companies quickly diversified into higher risk
areas of business, such as taking on
international consensus to run utilities elsewhere in
the world in more politically risky environments.
And they also expanded into a number of non water business.
Publicly and popular pay rises where also given to water company leaders.
And the sector has had long-term
difficulties in investing in more innovation.
Overall though, these controversies about privatization are actually now part
of the attitudes embedded in the U.K.'s water development path.
Customer and popular media responses to any major changes of path proposed by the
privatized water utilities are always now mediated
by this kind of framing of privatization.
We'll return to privatization in our follow on MOOC as I've said.
For moment, what I want to do here is highlight some
of the challenges faced now in the U.K.'s water development path.
These suggest that a change of course is going to be necessary, and given
what I've just said and what we've covered up to this point in the course.
You might want to reflect on how easy or difficult these changes will be.
First, here you can see the energy usage of U.K. water industry in recent years.
This graph comes from sustainability indicators, created
by Trade Body for the U.K. water sector;
Water U.K. They've been in collecting this
important information for a number of years now,.
You can see on the graph, that energy usage has
increased from about 8000 gigawatt hours a year to 9000.
This increase was over a period of less than a decade from 2002-3 to 2010-11.
Taking off is from national statistics data, there were
about 26.4 million households in the UK in 2013.
This tells us that the UK's water industry's energy usage
for 2013 is around about 340 kilowatt hours per household.
That's equivalent to about ten percent of the average UK
house hold annual electricity usage, which is about 3,300 kilowatt hours.
Or put it another way, to deliver a
year of water and waste water services; the U.K.
water industries, uses the equivalent of the annual energy
use of around about 3 million average U.K. households.
Also, overall the U.K. water industry accounts for about 2 to 3%
of total U.K. energy use, and about 1% of the U.K.'s carbon emissions.
Returning to the upward trend we can see
here in the graph, this is a challenge particularly
because the UK's climate change act requires carbon
footprint reductions if its targets are to be met.
Now, one of the main reasons I've heard put
forward about why the energy usage levels are going up
in the UK, is that more treatment has been
required to meet stricter quality and environmental regulations over time.
Of course, there are assumptions built in here about what
technologies and approaches are used to achieve these higher standards.
And you might want to think about what innovative approaches could be
used to bring down energy use while still maintaining or expanding quality levels.
One of the things the UK water industry itself
has been doing is to generate renewable energy from
sources such as bio gas, generated and captured from
sludge digestion and using combined heat and power systems.
You can see the effect of these kinds of new effort
in the lower right hand portion of water U.K.'s energy graph.
They showing as renewable heat and renewable
energy generation, these initiatives are of course important.
But you can see here that so far they've only
had a minor effect on the overall path that's been developing.
In 2010, Professor Martin Cave, who a few
years earlier had led an independent review of competition
and innovation in the U.K. water sector, along
with Seven Trent, published a report called Changing Course.
The title of that report is actually what inspired my title here for the video.
Professor Martin Cave and Seven Trent were aiming to highlight
how the past development path of the U.K. water industry.
If it's continued into the future without a
major change of direction will bring significant challenges ahead.
The data you can see here are adapted from this report.
First, in constant prices, average annual household water bills
could go up about a third over the next
20 years in the UK as compared to their
level during the past two decades according to this report.
That's because of increased investment needed.
Second, there is little sign of any
slowing of capital expenditure in the sector.
The report suggests that this will go up about 10% in the coming years.
Depending on what systems are installed and how much
they echo the problems and challenges of the past.
This could be a real problem.
Overall then, if we want to characterize the U.K.'s past
water development path and to think about where it may
go in the future, I'd use the keywords for the
past system like expensive, centralized and unintended or unforeseen consequences.
The U.K.'s assets from the 19th century were seen as
a significant step forward to be celebrated at the time.
But they are now, expensive to maintain.
They also have problems, like unsatisfactory combined zero
flows, and other issues, that leave them with only
limited resilience, to a changing climate that is
more likely to feature more frequent extreme weather events.
The UK's network is also highly centralized.
The pumping and treatment approaches, among other things use a lot
of energy and generate a significant carbon footprint, as we've seen.
And, the direction of travel for the carbon
footprint runs counter to the U.K.'s carbon targets.
The future system that politicians
regulate as customers and other stakeholders,
seem now to want, needs to be more resilient, affordable and sustainable.
Plan as a role so using various tools look
ahead more to try to foresee and anticipate future problems.
But at the same time water bills need to be kept
affordable, especially following the global economic
recession and cost of living pressures.
To wrap up this video, we've seen local variation and when similar
developments occurred at two different locations
in the U.K.'s water development path.
That's in London and in Manchester.
We saw that Manchester followed a similar
water first path to London but started later.
We then saw convergence in the local paths
followed in the UK with Manchester, like London,
needing to draw upon new water sources as
it grew and following a similar aqueducts approach.
And this may or may not affect the
UK's chances of addressing the kinds of challenges
we see, that it now faces as it
goes forward onto it's future water development path.
In the next video, we are going to explore what more we can tell about
the UK's path from the capital expenditure
profile of the England and Wales water sector.
Thanks for watching this video.
[BLANK_AUDIO]
Explorer notre catalogue
Rejoignez-nous gratuitement et obtenez des recommendations, des mises à jour et des offres personnalisées.
Coursera propose un accès universel à la meilleure formation au monde,
en partenariat avec des universités et des organisations du plus haut niveau, pour proposer des cours en ligne.
© 2019 Coursera Inc. Tous droits réservés.
