This weekend marked the beginning of an important new chapter of nation-building, with the celebration and formal launch of the world’s newest nation, the Republic of South Sudan.   United Nations Secretary General Ban Ki-moon and a host of dignitaries were on hand.  The decades-long civil war with the north ended in 2005, and the World Bank has had an office there since just after that.

 

I spent several days there two weeks ago, pre-independence, but very much in a moment of great excitement about what the nation the size of the Iberian peninsula with a population of 8 to 9  million could accomplish.

 

South Sudan will begin life as both a tremendously poor and under-served nation in terms of the services for its people, and a fantastically rich one in terms of resources and potential.  The country has less than 100 kilometers (62 miles) of paved road.  At present, conflict with the north’s Khartoum-based government continues over the key oil, gas, and mining provinces of the border region, where much of the international press is focused, as well as great deal of investment interest.

 

My focus was in the other direction, south of the sprawling capital of Juba, along the dramatic White Nile. I traveled with fantastic logistical support from the World Bank Juba office, from the Wildlife Conservation Society’s South Sudan conservation team, and from the director of the Nimule National Park.

Nimule is a remarkable site, with the White Nile variously raging and idling through as it expands and contracts from a wide flood plain to a series of raging rapids.  Nimule is also home to a large elephant population, largely spared during the conflict.  Nimule was also the sole beachhead of the Sudan People’s Liberation Movement, when the north and south engaged in bitter trench warfare on the very edge of the park.

 

Traveling by small plane, land rover, and foot with the Wildlife Conservation society’s South Sudan team and its dynamic director Paul Elkan, we visited the series of White Nile rapids on the edge of the park.  WCS is engaged in regional biodiversity conservation, eco-tourism development, and nation-building for South Sudan, and has been a partner in the region for a number of projects and programs.  I have never seen such a roar of water (see the embedded video, above) where boils and cauldrons flow violently upstream due to huge volume and the narrow channel the Fula Rapids occupy.  Photos of the rapids and park illustrate this blog.

The Fula Rapids in South Sudan seen from the air. Photograph courtesy of Daniel Kammen.

The Fula Rapids in South Sudan seen from the air. Photograph courtesy of Daniel Kammen.

 

The site raised a number of fundamental development opportunities and challenges for a nation that now has less than 200 megawatts of electric power generation.  First, how can ecologically sustainable run-of-the-river hydro and eco-development be designed and implemented in such a removed and underdeveloped region?  By some estimates, the Fula rapids could yield 60 megawatts of electric capacity. Meanwhile, there are several 700 to 800 megawatt projects large dam projects envisioned for the White Nile. Can efforts to build energy infrastructure and conservation dovetail with the needs to build regional power grids, and at a higher level, a regional power pool?  How would smaller-scale run-of-the-river hydro compare to large dams, which will be always be on the agenda for a river and region as underdeveloped as the White Nile?

 

These sorts of sustainable energy developments hold great promise to support nation-building in a region that very much is ready for this push.

Daniel Kammen’s posts appear here and on the Development in a Changing Climate blog at the World Bank, where he is chief technical specialist for renewable energy and energy efficiency. He is an adviser to National Geographic’s Great Energy Challenge initiative.

The author with a ranger at Nimule National Park, a remarkable site that was sole beachhead of the Sudan People’s Liberation Movement. Photograph courtesy of Daniel Kammen.

The author with a ranger at Nimule National Park, a remarkable site that was sole beachhead of the Sudan People’s Liberation Movement. Photograph courtesy of Daniel Kammen.

Comments

  1. amel gismallah
    khartoum
    July 15, 2011, 2:41 am Report abuse Report abuse

    hi
    iam sudanese grils i work for the national corporation for the antiquities and museums in sudan
    i really like ur essay
    i agree with u when talk about the WCS has engaged in regional biodiversity conservation, eco-tourism development, and nation-building for South Sudan this an essential key issues not only for southern part but but also the ubber part .
    ireally would love to have ur chance to see and visit those areas and discuss with the authorities for the collaboration possiabilites
    iwish u all the best ;iwish we can keep comunicate
    thanks

    AMEL

  2. Susan Apollo
    USA
    September 26, 2011, 6:57 pm Report abuse Report abuse

    Thanks Daniel. Continue doing the good work. You tell us very important matters that concerns our world.

    Appreciated

    Susan Apollo

  3. Dipti Vaghela
    United States
    October 4, 2011, 4:54 am Report abuse Report abuse

    From my lessons in implementing micro hydro in rural and tribal Orissa, I have experienced small scale hydro as a powerful tool for socio-economic upliftment and empowering equitable local governance.

    Of course, a well-implemented micro hydro will provide consistent and quality electricity, which in the Orissa context is not available from the frequently failing main grid. And of course, micro hydro allows clean and equitable electricity generation, when compared to coal power plants (with high climate changing emissions) and large hydro (often displacing rural households). In some cases, excess electricity feeds into the grid or micro grid.

    However, what fascinates me most about decentralized electricity production is the opportunity for rural households to come together as a community, using their differences as strengths, in order to implement, sustain, and productively use their own power generation.

    We have taught our rural youth and local technicians how to technically survey, implement, and sustain their micro hydro systems. We have facilitated village leadership to develop social solutions for load management and maintenance tasks. We have created space for community women to play a lead role in governing the project. We have supported the communities’ desires to use their self-generated electricity for establishing welfare activities (e.g. medical clinic, pharmacy, education center, entertainment), drudgery reduction (e.g. rice hulling, spice milling, oil pressing) and for income generation (e.g. tire repair shop, screen printing).

    These local youth, technicians, village committees, and women’s groups in turn have become crucial trainers and mentors for other communities who want to invest efforts in their own micro hydro system.

    Finally, when pilot projects work consistently and tangibly benefit the community, they organically attract government and private agencies to implement more such projects.

    Soon after, opportunities appear for influencing rural electrification policy to include the pragmatic best practices revealed in the pilot projects.

    Can a similar implementation framework be applied to small scale hydro in South Sudan?

  4. Dan Kammen
    Berkeley, CA USA
    October 5, 2011, 12:53 pm Report abuse Report abuse

    This is a really important and hopeful comment. There are a whole range of very promising technologies and community engagement and socially equitable development. In fact, to expand the discussion still further, here are a range of other potentially highly sustainable hydropower options.

    So, what can be done to diversify our clean energy technology options? In recent years we have seen a number of seemingly ‘old’ technologies undergo a reassessment, and a reinvention. Geothermal power, once assessed as, ‘an excellent source of baseload energy, but likely limited in commercially exploitable capacity’ has undergone a renaissance.

    In the latest IPCC Special Report on Renewable Energy Sources, the new view is that:

    In 2008, global geothermal energy use represented only about 0.1% of the global primary energy supply. However, by 2050, geothermal could meet roughly 3% of the global electricity demand and 5% of the global demand for heating and cooling (IPCC, 2011).

    That dramatic expansion of scope – a factor of 15 on a global scale – is a function of new technology options and forecasts for higher fossil fuel prices, is only one example.

    Another technology undergoing a dramatic expansion of options is that of hydropower. Conventional dams, large and small, use either a natural or more commonly an artificial ‘head’ or drop to harness energy:

    Energy = (mass of water) x (gravitational constant, g) x (head height)

    the mass of water = (density of water, ρ, a constant) x (volume).

    Thus, the energy available is increased with higher dam, and thus a larger flooded reservoir for conventional dams. Therein lies the problem of big dams that inundate ecosystems, displacing people and wildlife, and in some cases – ironically — generating large amounts of greenhouse gas emissions from the decomposition of flooded, submerged, biomass. Some dams have even caused earthquakes.

    Enter so called ‘hydrokinetic’ energy technologies. Conventional dams alter the river, creating artificial lakes. In hydrokinetic power plants, the energy does not come from falling water, but by extracting the kinetic (movement) energy from the water. Here

    Energy = (1/2) x mass x (velocity) x (velocity)

    Again the mass of water is density (ρ) x volume, so that the power harvested is proportional to the velocity cubed:

    P = (1/2) rho x (Area) x (velocity) x (velocity) x (velocity)

    This is very exciting because new turbines, nozzles and indeed innovations in everything from jet engines to ocean craft to the design of pipes can come into play to extract energy from flowing water. Hydrokinetic systems are applicable in both river and ocean currents, and can reduce the need for reservoirs and disruption of waterways dramatically, because no- or minimal- storage of water is needed.

    The array of hydrokinetic options is dizzying, and is a wonderful and promising field of innovation. A recent survey (Khan, et al., 2009) noted no less than ten promising options:

    Turbine Systems:

    - Axial (Horizontal): Rotational axis of rotor is parallel to the incoming water stream (employing lift or drag type blades)

    - Vertical: Rotational axis of rotor is vertical to the water surface and also orthogonal to the incoming water stream (employing lift or drag type blades)

    - Cross-flow: Rotational axis of rotor is parallel to the water surface but orthogonal to the incoming water stream (employing lift or drag type blades)

    - Venturi: Accelerated water resulting from a choke system (that creates pressure gradient) is used to run an in-built or on-shore turbine

    - Gravitational vortex: Artificially induced vortex (via funnels) effect is used in driving a vertical turbine

    Non-turbine Systems:

    - Flutter Vane: Systems that are based on the principle of power generation from hydroelastic resonance (‘flutter’) in free-flowing water

    - Piezoelectric: Piezo-property (charge accumulation or current generation in response to mechanical force in some specific materials) of polymers is utilized for electricity generation when a sheet of such material is placed in the water stream

    - Vortex induced vibration: Employs vibrations resulting from vortices forming and shedding on the downstream side of a bluff body in a current

    - Oscillating hydrofoil: Vertical oscillation of hydrofoils can be utilized in generating pressurized fluids and subsequent turbine operation.

    - Sails: Employs drag motion of linearly/circularly moving sheets of foils placed in a water stream

    There is a still a great deal to do in terms of technological reliability, cost, and how to scale these to be megawatt, or tens of megawatts, or more. Large conventional dams can be anything up to many giga-watts in scale. In an earlier blog (July 11 ‘New energy for the new nation of South Sudan) I described the Fula Rapids on the White Nile, a location as powerful as it is beautiful, where energy production and river conservation may be a great candidate for this technology.

    It is nice to see evolving technology, particularly one though of by many as mature and unchanging, up for a wave of innovation.

    References:

    Edenhofer, O., et al. (2011) Special Report on Renewable Energy Sources and Climate Change Mitigation (Cambridge University Press: Cambridge, UK).

    Khan, M. J., Bhuyan, G., Iqbal, M. T. and Quaicoe, J. E. (2009) “Hydrokinetic energy conversion systems and assessment of horizontal and vertical axis turbines for river and tidal applications: A technology status review, Applied Energy, 86, 1823 – 1835.