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The Status and Future Prospects of Hydropower for Sustainable Water and Energy Development in Tanzania

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The Status and Future Prospects of Hydropower for Sustainable Water and Energy Development in Tanzania Hindawi Journal of Renewable Energy Volume 2018, Article ID 6570358, 12 pages https://doi.org/10.1155/2018/6570358 Review Article The Status and Future Prospects of Hydropower for Sustainable Water and Energy Development in Tanzania Baraka Kichonge Mechanical Engineering Department, Arusha Technical College (ATC), P.O. Box 296, Arusha, Tanzania Correspondence should be addressed to Baraka Kichonge; [email protected] Received 7 January 2018; Accepted 8 March 2018; Published 6 May 2018 Academic Editor: Wei-Hsin Chen Copyright © 2018 Baraka Kichonge. Tis is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Tanzania is among the countries with the fastest growing economy in Africa and therefore the need for afordable, clean, and most importantly sustainable electrical energy to meet her ever growing demands is pressing. In recent years, the country’s electricity needs have been largely dominated by thermal generations despite the fact that Tanzania is gifed with huge hydropower resource potential approximated at 38,000 MW with only a very small portion exploited to date. However, the exploited potential is expected to grow by commissioning of identifed large and medium-scale hydropower projects with a total installed capacity of 4,765 MW currently under various stages of implementation. Moreover, the geographical location of Tanzania has several benefts to support development of small hydropower projects essential for appropriate utilization of available water resources as a way of mitigating climate challenges efects. Over the last decade, the country electricity demand along with end-use of energy has witnessed signifcant increases as economic development spreads towards achieving Vision 2025 goals. Proposed hydropower developments are projected to have enormous benefts in the acceleration of economic growth while contributing to greenhouse gas emissions reduction. In this paper, hydropower, which is one of the domestic options for clean energy development path, its present and future potential status, and water resources are explored based on a comprehensive review of energy sector relevant documents and polices. 1. Introduction of 30%–50% for thermal-power plants and other similar technologies [3, 4]. Hydropower continues to remain the Access to clean, afordable, and reliable energy coupled with most efcient technology for electricity generation with the itsimpactonmitigatingthedrasticefectsofclimatechange expectations of further improvements in future [5, 6]. due to human activities is one of this era’s most serious In pursuing her quest to attain a middle-income economy concerns in the quest for increasing prosperity through status as envisioned in its Development Vision 2025, Tanzania sustainable economic growth. Energy access is important faces huge tasks of meeting energy needs due to the high to achieving sustainable development goals. Te country’s expectations in growth to fuel the economy and at the same strategy is to accomplish electrifcation rate of more than 75 time minimize environmental challenges [1, 7, 8]. Provid- percent by the year 2033 with the focus on the transport and ing afordable and reliable energy specifcally electricity, is industrial sectors [1, 2]. Terefore, it can be noted that, in characterized as an important function of any country’s order to sustain the continually growth in an annual elec- economic sectors [9, 10]. Past decades have witnessed the tricity demand, the indigenous renewable energy resources actual electricity sector falls short of the required level of ought to be included in the pursuit of sustainable energy reliability, despite abundant hydroenergy potential available alternatives. Tis gives a determined motivation to investigate in the country. Lack of a reliable energy supply as expounded the potential of hydropower as a renewable energy source, in URT [11] was recognized as the main binding constraint which is yet to be fully exploited. Current hydropower tech- to economic development. Realizing solutions to meeting nologies are able to convert more than 90% of the available electricity demands while minimizing environmental chal- energy into electricity as compared to the efciencies ranges lenges, requires long-term and frm actions for sustainable 2 Journal of Renewable Energy economic development. In this paper, hydropower which is appears to be a promising solution for improving the quality one of the domestic options for clean energy development of life in rural areas where access to commercial energies path, its present and future potential status, and the water isachallenge[18,19,34].Asdealtwithbyseveralscholars resources are investigated in detail for Tanzania based on a and summarized in Figure 1, renewable energy touches all comprehensive review of energy sector relevant documents aspects of life including but not limited to socioeconomic, and polices. political, environmental, and technological, thus an intimate connection to sustainable development [6, 19, 35]. 2. Hydropower: Renewable and Sustainable Energy Resource 3. Water Sustainability in Tanzania Energy renewability relates to the concept of energy being 3.1. Geographical Location and General Climate. Tanzanian extractedfromaresourceandreplacedwiththesameamount is located in Eastern Africa region south of the equator. on a comparable time-scale as that of its extraction. Renewa- Te country is characterized with a tropical climate and bility is a direct response to uncertainties of energy supplies signifcant regional topographical variation. Large part of owing to possible interruptions and subsequent depletion Tanzania is categorized as highland with the exceptional of primary sources [15, 16]. Renewables are considered as of narrow coastal strip. Te climate varies from tropical carbon-neutral and inexhaustible energy resources encom- along the coast to temperate in the highlands. Te highland ∘ passing varieties of fuel types and usages with minimum temperatures are around 20–23 C throughout the year and secondary wastes productions [17, 18]. Renewables are also are characterized by unimodal and bimodal seasonal rainfall described as one of the most efcient and efective solutions distribution [36, 37]. Te primary drivers of seasonal rainfall to environmental challenges as compared to nonrenew- in Tanzania are categorized as intertropical convergence zone able sources [19–22]. Hydropower is accepted as renewable migration, narrow belt of very low pressure, and heavy energy resource and worthy of international support [23, precipitation forming near the earth equators [38]. Te 24]. Hydropower utilizes water for electricity generation bimodalseasonalrainfalloccursinthecoastalbelt,thenorth- without depleting it and therefore helps in contribuing to eastern highlands, and along Lake Victoria and is comprised fresh water sustainability for other downstream applica- of the short rainfall from October–December and the long tions. Hydropower is the only indigenous renewable energy rainsfallfromMarchtoJune.Teunimodalseasonalrainfall resourceinTanzaniawhoseroleinelectricitygenerationis regularly occurs from October to November to April in signifcantly greater than any other renewables [7, 12]. the central, southern, and south-western highlands of the Te concept of sustainability in development is well- country [38, 39]. defned by World Commission on Environment and Devel- opment(WCED)asthe“abilitytomakedevelopmentsus- 3.2. Water Policy and Resource Management. Water is a basic tainable and to ensure that it meets the needs of the present natural resource sustaining life and provides for countless without compromising the ability of future generations to socioeconomic needs for development [40, 41]. Tanzanian meet their own needs” [30, 31]. Sustainability is considered as water resource management and governance is divided into a direct response to deteriorating environmental quality cou- nine hydrological water basins through Act No. 10 of 1981 pled to a growing energy resource demands under depletion [42]. Seven out of these nine basins are transboundary threat as a result of populations growth and living standards including Lake Victoria basin jointly owned with Kenya improvement [15]. Hydropower as is the case for other and Uganda; Lake Tanganyika basin jointly shared with renewables is recognized as viable option for sustainable DR Congo, Zambia, and Burundi; Lake Nyasa Basin jointly developments because of its enormous potential and positive owned with Malawi and Mozambique; Lake Rukwa basin impact on the environment resulting in much lesser health jointly owned with Zambia; Ruvuma River Basin jointly and global climate change risks [18, 32, 33] (Panwar et al., owned with Mozambique and Malawi; along with the Cen- 2014). Hydropower has obvious benefts directly linked not tral Drainage Basin and Pangani River Basin both jointly only to electrical energy production but also to water man- owned with Kenya [43–45]. Water resource management agement to support sustainable socioeconomic development at the national level is principally managed by recognized and therefore will continue to remain with a unique role institutions such as policies, acts, and legislations and other to play in the foreseeable future. For example, hydropower interrelated organizations that are judiciously established in dams, reservoirs, and other infrastructures ofer exclusive accordance
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