June 27 2011 http://www.governancenow.com/views/columns/making-hash-its-mandate
The first ever cumulative impact assessment (CIA) study of
hydro-power projects being built on Bhagirathi and Alaknanda, two
tributaries of river Ganga, has come as a big disappointment.
Carried out by the Alternate Hydro Energy Centre (AHEC) of IIT
(Roorkee), which submitted its report to the ministry of environment and
forests (MoEF) recently, the study ignores the very raison d’être of
its endeavour – assess cumulative impact of 70 hydro-power projects
(HPs) commissioned or in various stages of development (three of which
were scrapped last year) on these rivers, their surrounding ecosystems
and human habitations along the rivers. Of the 70, 54 are
run-of-the-river (ROR) and the rest storage-based projects.
The task was onerous and yet important to make sure the drive to harness
hydro-power doesn’t kill the rivers and the life-sustaining environment
they build around them. In fact, it was prompted by a supreme court
order of 2009 to allay such fears and came in the wake of scrapping
three major HPs – at Loharinag Pala, Pala Maneri and Bhaironghati on
Bhagirathi river. But the findings not only fail to live up to the
expectations, they do a reverse swing and advocate more such projects.
Here are some of the key issues involved in the study, the findings and what’s wrong with these findings.
* Both Bhagirathi and Alaknand originate from glaciers and so do several
of their tributaries. The report says glaciers are in much higher
altitudes, upstream and distant to be affected by the HPs.
Right, but it doesn’t take into consideration the crucial fact that 75
percent of Himalayan glaciers are retreating at an annual rate of 3.75
percent. This was revealed in the “most detailed” satellite-imagery
based study “Snow and glaciers of the Himalayas” carried out jointly by
the ministry of environment and forests (MoEF) and Department of Space.
Though this particular report was released in June this year, similar
findings have been published in the past too.
The study doesn't take into consideration how much less water will flow
in over the next five, 10 or 15 years and how that would impact the
existing hydro-power projects. Prudence demands that such information
are taken into consideration while planning or assessing projects.
*A dam (storage-based project) submerges part of the river and
run-of-the-river project diverts a part of it, thus “affecting” the
river. Talking about diversion, the report says “the river becomes dry
in the diverted stretch” which could be “very long” and “fatal to
aquatic life”, besides depriving water to people on the banks.
Submergence too has an adverse impact.
The report goes on to point out that the existing HPs would affect 47.3
percent of Bhagirathi and its tributaries and 43.9 percent of Alaknand
and its tributaries. While failing to assess what the cumulative impact
would be on the rivers and their tributaries, the report proposes "a
threshold, say 70 percent, may be fixed" for this, meaning that a river
may be allowed to be submerged or diverted up to 70 percent of its
length.
Shockingly, the study doesn’t say on what basis this threshold has been
arrived at. Taken singly, the report points out, 70.71 percent of
Bhagirathi river is affected (31% diverted, 39% submerged), yet it goes
on to advocate for revival of the Loharinag Pala project and others on
the same river which were scrapped last year.
* The study recognizes the fact that all HPs adversely impact the river
and its aquatic life and hence it should get a breathing space between
the dams/barrages “so that the river is given an opportunity to
recuperate its ecological environment”. But what should this breathing
space be or whether adequate breathing space has been provided in the
existing projects has not been spelt out.
* The study recognizes that HPs restrict flow of rivers and that to keep
the rivers and their ecosystems in good health and sustain human
livelihood and wellbeing certain quantity of water should “always flow
in the rivers”. It describes this flow as “environmental flow” but bases
its calculations on the “minimum flow” required, ignoring needs and
expectations of people living on the banks, a flow required to help
flora and fauna to prosper and flourish, and not just survive and the
fact that floods too have important ecological functions.
While proposing a minimum flow, the report acknowledges that this may
reduce power generation and “such reduction may make several schemes
unviable, especially small scale hydropower schemes”. Yet, it doesn’t
say if we should scrap more projects to account to prevent this. On the
contrary it concludes that hydro-power can be harnessed with
environmental sustainability “provided certain measures are taken”. What
these measures are, we are not told.
This part of the study also suffers from “a major handicap” as “measured
river cross sections and velocity of flows were available at limited
locations”. It goes on to say that the desired “building block method”
which should be applied to arrive at the right environmental flow
“requires much more data, time and manpower and other resources and
therefore, could not be applied in this study”.
* The study registers negative changes in water quality but gives a
thumbs-up saying that the impact is well within the limits of
environmental sustainability. This assessment is based on individual
case studies, rather than the combined impact of a series of projects.
Experts point out that the thumbs-up is based on Centre for Pollution
Control Board’s “use-based” classification of water which may be okay to
determine potability of water drawn from a tube well but not for
determining water quality of a natural river.
* The study admits that Bhagirathi and Alaknanda river basins are rich
in biodiversity “designated as sensitive habitats” with “high
conservation significance”. It also says that construction of reservoirs
prevents migration of aquatic life and changes the domain of flowing
water (river) to a standing water (lake) domain. This change brings
about “significant changes in physic-chemical characteristics affecting
the ecological parameters.
But it goes on to conclude: “So far, we don’t have any study of changes
in aquatic life from river to reservoir. Thus, at present it is not
possible to give any firm assessment on the impact of HPs on
biodiversity of Alaknand and Bhagirathi.” But wasn’t that the purpose of
the study?
It devotes considerable space to impact on fishes, particularly the
famed golden mahseer and snow trout that so characterize these rivers by
observing that the fishes “require an uninterrupted riverine habitat as
well as floodplains for their breeding”, which dams and tunnels
disrupt. And by way of solution, it says “fish passes” of various kinds
be used. But not a word has been said about the efficacy of these passes
and instances where such methods have been used successfully to make a
convincing argument.
The only worthwhile suggestion the report contains is that no more HPs
should be set up on the tributaries of Bhagirathi and Alaknand. It sys:
“These streams have been identified as Nayar, Birhi Ganga, Bhyunder
Ganga, Balganga and Asiganga which should not be exploited further as
these are the lifelines of the main ecosystem of Alaknanda and
Bhagirathi rivers”.
* The study points out that tunneling work for ROR projects damage
springs and other underground water channels. This alters water
availability and effects local population. But in a typical bureaucratic
exercise, it says such blockages would lead to springs finding
alternate routes and that the reservoirs being built in other projects
would recharge ground water to conclude that the effect will be
localized and the cumulative impact will be negligible. And then it goes
on to contradict itself: “In the absence of relevant groundwater in the
project scenario it may be difficult (or improper) to conclude with
confidence on the impact on construction of HPs on the availability of
drinking water sources to the population in the project area”.
* Photographs carried in the report tell a harrowing tale of
recklessness. Huge piles of muck, generated from excavation work, have
been dumped in the river beds, skirting the water flow and in forested
areas of hills destroying vegetation. Instead of expressing anxiety and
asking for immediate remedial action to prevent damage to the river and
forests, it merely advises that suitable dumping ground may be found.
Worse, it points out that afforestation and catchment area treatment has
not started for any of the HPs and that post construction impact data
are not available. Yet, it concludes that “the problems generated during
the construction “will die out automatically”.
* The study is dotted with lamentations about lack of data and relevant
information. The chapter on “recommendations” begins with this gem: “In
view of the fact that the field of cumulative impact assessment (CIA) is
new and is being introduced for the first time in India, there are many
gaps in the knowledge necessary to undertake CIA with the desired
degree of precision, particularly in the Himalayan region where the
database is weaker than that in the rest of the country. It is therefore
necessary that a major programme of research and development should be
drawn and implemented as early as possible.”
Bharat Jhunjhunwala, former professor of IIM-Bangalore whose petition to
the central empowered committee (CEC) led to the supreme court ordering
this cumulative study in 2009, says the basic mistake of the study is
to define cumulative impact more in terms of sustainable development in
long term and less in terms of combined impact of more than one project
taken together.
He goes on to add that AHEC has failed to include several impacts in its
study: loss of forests and biodiversity, trapping of sediments in
reservoirs, methane emissions from reservoir, impact on health due to
mosquito breeding in reservoirs and so on.
In fact, when IIT-Roorkee was given the task by the MoEF, he had
objected to the choice of both the organization and its director Arun
Kumar, saying that their primary competence was in engineering and
design of small hydropower projects, rather than environmental studies.
He would have preferred if the task had been given to NEERI, Wildlife
Institution of India or Forest Research Institute.
Himanshu Thakkar, an expert on water management issues, dismisses the
report as “pathetic” and says he is planning to write to the environment
minister Jairam Ramesh to junk it.
He finds several major flaws: lamentations about lack of relevant data
which was its job to provide, a pronounced bias for hydropower projects,
absence of cumulative impact study of key indicators, silence on
restrictions to ensure bio-diversity and ecological stability and
several others. He is particularly disturbed with the IIT-Roorkee’s
prescription of letting 70 percent of the river length be affected. He
says a river gets killed in two ways – submergence and diversion –
adding, “So to allow killing of 70 percent of a river is nonsense”.