Balancing ecosystem services with energy and food security – Assessing trade-offs from reservoir operation and irrigation investments in Kenya's Tana Basin

Hydrology and Earth System Sciences - Tập 18 Số 8 - Trang 3259-3277
Anthony Hurford1,2, Julien Harou3,2
1HR Wallingford, Water Management Group, Wallingford, UK
2University College London, Department of Civil, Environmental and Geomatic Engineering, London, UK
3The University of Manchester, School of Mechanical, Aerospace and Civil Engineering, Manchester, UK

Tóm tắt

Abstract. Competition for water between key economic sectors and the environment means agreeing allocations is challenging. Managing releases from the three major dams in Kenya's Tana River basin with its 4.4 million inhabitants, 567 MW of installed hydropower capacity, 33 000 ha of irrigation and ecologically important wetlands and forests is a pertinent example. This research seeks firstly to identify and help decision-makers visualise reservoir management strategies which result in the best possible (Pareto-optimal) allocation of benefits between sectors. Secondly, it seeks to show how trade-offs between achievable benefits shift with the implementation of proposed new rice, cotton and biofuel irrigation projects. To approximate the Pareto-optimal trade-offs we link a water resources management simulation model to a multi-criteria search algorithm. The decisions or "levers" of the management problem are volume-dependent release rules for the three major dams and extent of investment in new irrigation schemes. These decisions are optimised for eight objectives covering the provision of water supply and irrigation, energy generation and maintenance of ecosystem services. Trade-off plots allow decision-makers to assess multi-reservoir rule-sets and irrigation investment options by visualising their impacts on different beneficiaries. Results quantify how economic gains from proposed irrigation schemes trade-off against the disturbance of ecosystems and local livelihoods that depend on them. Full implementation of the proposed schemes is shown to come at a high environmental and social cost. The clarity and comprehensiveness of "best-case" trade-off analysis is a useful vantage point from which to tackle the interdependence and complexity of "water-energy-food nexus" resource security issues.

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Tài liệu tham khảo

Abson, D. J. and Termansen, M.: Valuing Ecosystem Services in Terms of Ecological Risks and Returns, Conserv. Biol., 25, 250–258, https://doi.org/10.1111/j.1523-1739.2010.01623.x, 2011.

Birol, E., Karousakis, K., and Koundouri, P.: Using economic valuation techniques to inform water resources management: A survey and critical appraisal of available techniques and an application, Sci. Total Environ., 365, 105–122, https://doi.org/10.1016/j.scitotenv.2006.02.032, 2006.

Chakravarty, S.: Cost-benefit analysis, Palgrave Macmillan, Basingstoke, UK, 1987.

Coello, C. A. C., Lamont, G. B., and Van Veldhuisen, D. A.: Evolutionary Algorithms for Solving Multi-objective Problems, Springer Science + Business Media, LLC, 2007.

Cohon, J. L.: Multiobjective programming and planning Jared L. Cohon, xiv, 333, 1978.

Connell, J. H.: Intermediate-disturbance hypothesis, Science, 204, 1345–1345, https://doi.org/10.1126/science.204.4399.1345, 1979.

Dagg, M., Woodhead, T., and Rijks, D. A.: Evaporation in east africa, International Association of Scientific Hydrology, Bulletin, 15, 61–67, 1970.

Davies, J.: Total Economic Valuation of Kenyan Pastoralism, IUCN, available at: http://cmsdata.iucn.org/downloads/kenya_tev.pdf, 2007.

Doorenbos, J. and Kassam, A. H.: Yield response to water, Irrigation and Drainage Paper 33, Food and Agriculture Organization of the United Nations, Rome, 193 pp., 1979.

Duvail, S., Médard, C., Hamerlynck, O., and Nyingi, D. W.: Land and water grabbing in an East African coastal wetland: The case of the Tana delta, Water Alternativ., 5, 322–343, 2012.

Emerton, L.: Values and Rewards: Counting and Capturing Ecosystem Water Services for Sustainable Development, IUCN Water, Nature and Economics Technical Paper No. 1, IUCN – The World Conservation Union, 2005.

Fleming, P. J., Purshouse, R. C., and Lygoe, R. J.: Many-objective optimization: An engineering design perspective, Evolut. Multi-Criterion Optim., 3410, 14–32, 2005.

Gao, Y. X., Vogel, R. M., Kroll, C. N., Poff, N. L., and Olden, J. D.: Development of representative indicators of hydrologic alteration, J. Hydrol., 374, 136–147, https://doi.org/10.1016/j.jhydrol.2009.06.009, 2009.

Godfray, H. C. J., Beddington, J. R., Crute, I. R., Haddad, L., Lawrence, D., Muir, J. F., Pretty, J., Robinson, S., Thomas, S. M., and Toulmin, C.: Food Security: The Challenge of Feeding 9 Billion People, Science, 327, 812–818, https://doi.org/10.1126/science.1185383, 2010.

Granit, J., Jagerskog, A., Lindstrom, A., Bjorklund, G., Bullock, A., Lofgren, R., de Gooijer, G., and Pettigrew, S.: Regional Options for Addressing the Water, Energy and Food Nexus in Central Asia and the Aral Sea Basin, Int. J. Water Resour. Develop., 28, 419–432, https://doi.org/10.1080/07900627.2012.684307, 2012.

Grey, D. and Sadoff, C. W.: Sink or Swim? Water security for growth and development, Water Pol., 9, 545–571, https://doi.org/10.2166/wp.2007.021, 2007.

GWP: Integrated Water Resources Management, TAC Background Papers, edited by: Committee, T. A., Global Water Partnership, Stockholm, Sweden, 2000.

GWP: Poverty Reduction and IWRM, Global Water Partnership, Sweden 91-974559-0-3, 2003.

Harou, J. J., Pulido-Velazquez, M. A., Rosenberg, D. E., Medellin-Azuara, J., Lund, J. R., and Howitt, R.: Hydro-economic Models: Concepts, Design, Applications and Future Prospects, J. Hydrol., 375, 334–350, 2009.

Hughes, F. M. R.: The influence of flooding regimes on forest distribution and composition in the tana river floodplain, Kenya, J. Appl. Ecol., 27, 475–491, https://doi.org/10.2307/2404295, 1990.

Hurford, A. P., Huskova, I., and Harou, J. J.: Using many-objective trade-off analysis to help dams promote economic development, protect the poor and enhance ecological health, Environ. Sci. Pol., 38, 72–86, https://doi.org/10.1016/j.envsci.2013.10.003, 2014.

Juana, J. S., Mangadi, K. T., and Strzepek, K. M.: The socio-economic impacts of climate change on water resources in South Africa, Water Int., 37, 265–278, https://doi.org/10.1080/02508060.2012.687505, 2012.

Karere, G. M., Oguge, N. O., Kirathe, J., Muoria, P. K., Moinde, N. N., and Suleman, M. A.: Population sizes and distribution of primates in the lower Tana River forests, Kenya, Int. J. Primatol., 25, 351–365, https://doi.org/10.1023/b:ijop.0000019156.41782.53, 2004.

Kasprzyk, J. R., Reed, P. M., Kirsch, B. R., and Characklis, G. W.: Managing population and drought risks using many-objective water portfolio planning under uncertainty, Water Resour. Res., 45, W12401, https://doi.org/10.1029/2009wr008121, 2009.

Keim, D., Andrienko, G., Fekete, J. D., Gorg, C., Kohlhammer, J., and Melancon, G.: Visual analytics: Definition, process, and challenges, in: Information Visualization: Human-Centered Issues and Perspectives, edited by: Kerren, A., Stasko, J. T., Fekete, J. D., and North, C., Lecture Notes in Computer Science, 154–175, 2008.

Kinnaird, M. F.: Phenology of flowering and fruiting of an East-African riverine forest ecosystem, Biotropica, 24, 187–194, https://doi.org/10.2307/2388672, 1992.

Kiptala, J. K.: Intersectoral Allocation in the Tana River Basin (Kenya), Master of Science, Institute for Water Education, UNESCO-IHE, Delft, 2008.

Kollat, J. B. and Reed, P. M.: Comparing state-of-the-art evolutionary multi-objective algorithms for long-term groundwater monitoring design, Adv. Water Resour., 29, 792–807, https://doi.org/10.1016/j.advwatres.2005.07.010, 2006.

Kollat, J. B. and Reed, P.: A framework for visually interactive decision-making and design using evolutionary multi-objective optimization (VI(D)under-barEO), Environ. Modell. Softw., 22, 1691–1704, https://doi.org/10.1016/j.envsoft.2007.02.001, 2007.

Kollat, J. B., Reed, P. M., and Kasprzyk, J. R.: A new epsilon-dominance hierarchical Bayesian optimization algorithm for large multiobjective monitoring network design problems, Adv. Water Resour., 31, 828–845, https://doi.org/10.1016/j.advwatres.2008.01.017, 2008.

Kollat, J. B., Reed, P. M., and Maxwell, R. M.: Many-objective groundwater monitoring network design using bias-aware ensemble Kalman filtering, evolutionary optimization, and visual analytics, Water Resour. Res., 47, W02529, https://doi.org/10.1029/2010wr009194, 2011.

Konrad, C. P., Warner, A., and Higgins, J. V.: Evaluating dam re-operation for freshwater conservation in the sustainable rivers project, River Res. Appl., 28, 777–792, https://doi.org/10.1002/rra.1524, 2012.

Labadie, J. W.: Optimal Operation of Multireservoir Systems: State-of-the-Art Review, J. Water Resour. Plann. Manage., 130, 93–111, https://doi.org/10.1061/(ASCE)0733-9496(2004)130:2(93), 2004.

Leauthaud, C., Duvail, S., Hamerlynck, O., Paul, J.-L., Cochet, H., Nyunja, J., Albergel, J., and Gruenberger, O.: Floods and livelihoods: The impact of changing water resources on wetland agro-ecological production systems in the Tana River Delta, Kenya, Global Environ. Change-Human Pol. Dimensions, 23, 252–263, https://doi.org/10.1016/j.gloenvcha.2012.09.003, 2013.

Lotov, A. V.: Visualization of pareto frontier in environmental decision making, Environ. Secur. Harbor. Coastal Areas: Management Using Comparative Risk Assessment and Multi-Criteria Decision Analysis, 275–292, https://doi.org/10.1007/978-1-4020-5802-8_19, 2007.

Loucks, D. P., Van Beek, E., Stedinger, J. R., Dijkman, J. P. M., and Villars, M. T.: Water Resources Systems Planning and Management: An Introduction to Methods, Models and Applications, Unesco, 2005.

Maass, A., Hufschmidt, M. M., Dorfman, R., Thomas, H. A., Jr., Marglin, S. A., and Fair, G. M.: Design of water-resource systems, Harvard University Press, Cambridge, Mass., 1962.

Maingi, J. K. and Marsh, S. E.: Quantifying hydrologic impacts following dam construction along the Tana River, Kenya, J. Arid Environ., 50, 53–79, https://doi.org/10.1006/jare.2000.0860, 2002.

Malley, Z. J. U., Taeb, M., Matsumoto, T., and Takeya, H.: Environmental change and vulnerability in the Usangu plain, southwestern Tanzania: Implications for sustainable development, Int. J. Sustain. Develop. World Ecol., 14, 145–159, 2007.

Matrosov, E. S., Harou, J. J., and Loucks, D. P.: A computationally efficient open-source water resource system simulator – Application to London and the Thames Basin, Environ. Modell. Softw., 26, 1599–1610, https://doi.org/10.1016/j.envsoft.2011.07.013, 2011.

McCully, P.: Silenced Rivers: The Ecology and Politics of Large Dams, Zed Books Ltd, London, 2001.

Merrey, D. J., Drechsel, P., de Vries, F. W. T. P., and Sally, H.: Integrating "livelihoods" into integrated water resources management: taking the integration paradigm to its logical next step for developing countries, Reg. Environ. Change, 5, 197–204, https://doi.org/10.1007/s10113-004-0088-5, 2005.

Mitsch, W. J. and Gosselink, J.: Wetlands, Wiley, New York, 2000.

Mireri, C., Onjla, J., and Oguge, N.: The Economic Valuation of the Proposed Tana Integrated Sugar Project (TISP), Kenya, Nature Kenya, Kenya, 2008.

Nash, J. E. and Sutcliffe, J. V.: River flow forecasting through conceptual models part I – A discussion of principles, J. Hydrol., 10, 282–290, https://doi.org/10.1016/0022-1694(70)90255-6, 1970.

Paton, J. and Bryant, G.: Valuing Pollution: Problems of Price in the Commodification of Nature, Econom. Labour Relations Rev., 23, 87–106, 2012.

Ramsar: Tana River Delta added to the Ramsar List: available at: http://www.ramsar.org/cda/en/ramsar-news-archives-2012-kenya-tana/main/ramsar/1-26-45-520

Reed, P. M., Hadka, D., Herman, J. D., Kasprzyk, J. R., and Kollat, J. B.: Evolutionary multiobjective optimization in water resources: The past, present, and future, Adv. Water Resour., 51, 438–456, https://doi.org/10.1016/j.advwatres.2012.01.005, 2013.

Renofalt, B. M., Jansson, R., and Nilsson, C.: Effects of hydropower generation and opportunities for environmental flow management in Swedish riverine ecosystems, Freshw. Biol., 55, 49–67, https://doi.org/10.1111/j.1365-2427.2009.02241.x, 2010.

Richter, B. D. and Thomas, G. A.: Restoring environmental flows by modifying dam operations, Ecol. Soc., 12, available at: http://www.ecologyandsociety.org/vol12/iss1/art12/, 2007.

Richter, B. D., Baumgartner, J. V., Powell, J., and Braun, D. P.: A method for assessing hydrologic alteration within ecosystems, Conserv. Biol., 10, 1163–1174, https://doi.org/10.1046/j.1523-1739.1996.10041163.x, 1996.

Sagoff, M.: Environmental economics and the conflation of value and benefit, Environ. Sci. Technol., 34, 1426–1432, https://doi.org/10.1021/es990674d, 2000.

Sagoff, M.: On the economic value of ecosystem services, Environ. Values, 17, 239–257, https://doi.org/10.3197/096327108x303873, 2008.

Sagoff, M.: The quantification and valuation of ecosystem services, Ecol. Econom., 70, 497–502, https://doi.org/10.1016/j.ecolecon.2010.10.006, 2011.

Shih, J.-S. and ReVelle, C.: Water-Supply Operations during Drought: Continuous Hedging Rule, J. Water Resour. Plann. Manage., 120, 613–629, 1994.

Shukla, P. K., Deb, K., and Tiwari, S.: Comparing classical generating methods with an evolutionary multi-objective optimization method, Evolut. Multi-Criterion Optimiz., 3410, 311–325, 2005.

Steele, S. R.: Expanding the solution set: Organizational economics and agri-environmental policy, Ecol. Econom., 69, 398–405, https://doi.org/10.1016/j.ecolecon.2009.08.014, 2009.

Watts, R. J., Ryder, D. S., Allan, C., and Commens, S.: Using river-scale experiments to inform variable releases from large dams: a case study of emergent adaptive management, Mar. Freshw. Res., 61, 786–797, https://doi.org/10.1071/mf09190, 2010.

WCD: Dams and Development: A New Framework for Decision-Making: Report of the World Commission on Dams, Earthscan Publications, London, 2000.

Wilson, M. A. and Carpenter, S. R.: Economic valuation of freshwater ecosystem services in the United States: 1971–1997, Ecol. Applic., 9, 772–783, https://doi.org/10.2307/2641328, 1999.

Winpenny, J.: Managing Water as an Economic Resource, Taylor & Francis, 1993.

Yeh, W. W. G.: Reservoir management and operations models – a state-of-the-art review, Water Resour. Res., 21, 1797–1818, https://doi.org/10.1029/WR021i012p01797, 1985.

Yergin, D.: Ensuring energy security, Foreign Affairs, 85, 69–82, https://doi.org/10.2307/20031912, 2006.

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Hydrology and Earth System Sciences

Tập 18 Số 8

3259-3277

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