Definition, Forms, and UnitsEnergy is the capacity of matter to do work in relation toforces acting on it. Five forms of energy are oftendistinguished: (i) Mechanical, (ii) Electromagnetic, (iii)Thermal, (iv) Chemical, and (v) Nuclear. Energy conversiontakes place among and within these forms in the process ofhuman production and consumption, as well as in nature;for example burning fuels to produce heat convertschemical energy to thermal energy (i.e., burning woodreleases stored chemical energy, but all is not converted toheat; if heat is the desired form of conversion, conversionto other forms are losses). The efficiency of conversion fromone form to another depends on the extent to whichunwanted dissipation can be avoided. Unwanted dissipationin the process of conversion and use is energy lost.The most common energy sources are biomass, solar,fossil, hydropower, wind, and wave. The sources can beclassified as renewable or nonrenewable depending onwhether they can supply continuously or will be exhausted.The primary source of energy available to us is the sun. Theconcept of renewable and nonrenewable energy is a relativeone—it is basically a distinction about time and spacescale.Energy is measured and expressed in various ways.Joule (J) is the internationally recognized unit for energy.Energy production and use involves conversion of energyfrom one form to another: the rate of conversion (or rate ofdoing work) is defined as power, which is commonlymeasured in watt (W): 1 W is 1 J per second. Electricalappliances have power ratings quoted as W or kW, such asa 40-W electric bulb. Kilogram of oil equivalent issometimes used to bring energy consumption from differentsources to a single, common unit and to express it in aneasily understandable manner.Source: Blunden et al. (1991)Alternative energy. Biogas, micro-hydro, solar,and wind energy come under this heading. Biogas isa more efficient way of utilizing some biomass(animal dung) as energy. Hydropower (includingmicro-hydro), biogas, solar, and wind energy arerenewable; within their re-generation capacity, thesecan supply energy indefinitely.Nepal’s indigenous energy resources includebiomass, hydroelectricity, solar, and wind. Coal andpetroleum products are imported, as the country hasno known economically exploitable fossil fuelreserves. The potential of known indigenous energyresources in Nepal is estimated to be 1,970 milliongigajoule (GJ) annually on a sustainable basis (WECS1996), which would be 15 times the estimated totalconsumption. This indicates that there is sufficientpotential energy supply from indigenous sources. Ofthe total sustainable potential, water resourcesrepresent the largest fraction (75%), with forestscontributing 12%, and the rest coming from othersources.Consumption PatternsIn 2002, Nepal’s total energy demand was 8,883thousand tons of oil equivalent. Energy consumptionincreased at an average rate of 2.5% per annumbetween 1993 and 2002. The annual per capitaenergy consumption is 347 kg of oil equivalent (CBS2004).The energy consumption pattern by sourcebetween 1993/94 and 2002/03 is shown in Table 6.1.Energy consumption is dominated by traditionalsources, which accounted for about 87% of the totalenergy consumption in 2002/03, although itspercentage of total consumption has been slowlydeclining (Table 6.2). Of the traditional sources,fuelwood accounted for 89%, agricultural residuesfor 4%, and animal waste for 6%. Fuelwoodcontributed 75% of the total energy consumed in2002/03. This indicates the pressure on the traditionalsources, primarily on the forests.The share of commercial and alternativesources has been increasing, although at a slowpace. From 1993/94 to 2002/2003, consumption ofcommercial energy increased from 7.5% to 12% ofthe total energy consumed, and the contribution ofalternative energy increased from about 0.1% to0.5%.The energy consumption by sector is shown inTables 6.3 and 6.4. The residential sector consumed90.6% of all energy consumed in 2003, followed bytransport (3.9%), industry (3.4%), commercial (1.2%),agriculture (0.8%), and others (0.1%). Although theamount of energy consumed has increased, theshare of energy consumed by different sectors hasremained more or less unchanged over the lastdecade.The residential sector mainly consumestraditional fuels, whereas the “other” sectorconsumes commercial fuels. Residential consumptionaccounts for around 98% of the traditional fuelsconsumed in the country. Cooking is the mainresidential use of energy in rural areas, where themajority of people live, and fuelwood is the mainsource (household cooking consumes 65% of allrural energy). The residential sector consumes 99%of total fuelwood consumption. In urban areas,kerosene, liquefied petroleum gas (LPG), orelectricity is used for cooking (MOPE 2003). Nepalimports all petroleum products and coal, most ofwhich is consumed by automobiles and industries.Nepal’s energy supply and consumptionpatterns are overwhelmingly dominated bytraditional biomass sources and residential uses,respectively. The principal use of biomass energy in66 Environment Assessment of Nepal : Emerging Issues and Challenges
Table 6.2: Energy Consumption Pattern by Source 1993/94 –2002/03Energy Consumed (‘000 toe)Percentage of Energy ConsumedYear Traditional Commercial Other Total Traditional Commercial Other Total1993/94 5,933 483 6 6,422 92.4 7.5 0.1 1001994/95 6,059 582 8 6,649 91.1 8.8 0.1 1001995/96 6,<strong>18</strong>5 651 11 6,847 90.3 9.5 0.2 1001996/97 6,268 691 15 6,974 89.9 9.9 0.2 1001997/98 6,403 769 21 7,193 89.0 10.7 0.3 1001998/99 6,540 811 25 7,376 88.7 11.0 0.3 1001999/00 6,681 1,044 29 7,754 86.1 13.5 0.4 1002000/01 6,824 1,095 34 7,953 85.8 13.8 0.4 1002001/02 6,996 1,169 39 8,204 85.3 14.2 0.5 1002002/03 7,240 1,003 39 8,282 87.4 12.1 0.5 100toe = tons of oil equivalentSource: MoF (2003)Table 6.3: Energy Consumption by Sector ( ‘000 GJ)Sector 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003Residential 254,853 260,951 267,542 274,341 281,533 287,815 295,159 301,143 314,655 320,268Industrial 9,231 11,084 11,771 6,417 6,921 7,522 15,717 12,998 12,537 11,969Commercial 2,206 2,558 2,840 3,179 2,919 3,215 3,708 4,128 4,921 4,081Transport 6,682 7,839 8,721 11,942 13,546 14,849 12,798 13,592 12,025 13,850Agricultural 535 640 690 966 1,099 711 2,968 3,152 2,776 2,888Other 206 243 262 293 322 342 355 409 454 484Total 273,712 283,315 291,827 297,139 306,339 314,454 330,706 335,421 347,369 353,541GJ = gigajoulesSource: Water and Energy Commission Secretariat, Kathmandu, 2005. Unpublished data file.Table 6.4: Share of Energy Consumption by SectorSector1994 2003% %Residential 93.1 90.6Industrial 3.4 3.4Commercial 0.8 1.2Transport 2.4 3.9Agricultural 0.2 0.8Other 0.1 0.1Total 100.0 100.0Source: Water and Energy Com mission Secretariat, Kathmandu , 2005.Unpublished data file.rural Nepal is burning in traditional cooking stoves oropen fires. This is very inefficient, as most of the heatgenerated is lost. It is possible to increase theefficiency by introducing better technologies such asimproved cooking stoves.HydropowerNepal is rich in water resources. The gradientprovided by the mountain topography, monsoon rain,and <strong>Himalayan</strong>-fed rivers offer great potential forhydropower development (Tables 6.5 and 6.6). Thehydropower potential in Nepal is estimated to be83,000 megawatts (MW), of which 42,000 MW iseconomically feasible at present. A substantialproportion of the potential is based on reservoirprojects.The National Water Plan (2002–2027) estimatesthat the maximum domestic demand for power by2027 will be less than 7,000 MW even under a highgrowthscenario—this is only about 17% of theeconomically feasible potential. This indicates thatNepal will have substantial surplus potential for theforeseeable future, and in theory the surplus couldbe exported to neighboring countries, particularly toIndia and Bangladesh where there are energyshortages.Nepal has been keen to encourage hydropowerdevelopment. The Water Resources ACT 1992,Hydropower Development Policy 1992 and 2001,Electricity Act 1992, and Environment Protection Act1996 are milestones in this direction. However,despite the great potential and the Government’semphasis on developing hydropower, theChapter 6: Energy Resources67
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About the OrganisationsAsian Develo
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© 2006 International Centre for In
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AcknowledgementsWe would like to ex
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PM2.5PAHRSSAARCSACEPSEASO 2TSPUKUND
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Chapter 6: Energy Resources 65Intro
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List of FiguresFigure 2.1: People a
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soil erosion, and depletion of wate
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Min BajracharyaB. PradhanVehicles a
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earthquakes; and awareness raising
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Sub-regional LinkagesOther developi
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. Cultural Heritage8. Convention fo
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Some funding arrangements made by t
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(NARDF 2004) for a period of 1 to 3
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From Hands Around Everest bookFrom
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microorganism communities and the n
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subsidies (Mason 1996). All these a
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addressed only part of the problem.
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historical practice of community-ma
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Kathmandu Valley and receives a lar
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further poaching has not been repor
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http://www.pugwash.org/reports/pac/
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United Nations. 2003. World Populat
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Nepal’s Changing Pattern of Trade
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Table 12.2: Trade/ GDP RatiosFY1981
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well as other provisions in specifi
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elevant due to its multidisciplinar
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Judith DobmannThere are many source
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Appendix 14.1: List of Key Environm
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(vii) The EIA report approving agen
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Goal 1: Eradicate extreme poverty a
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Nepal’s Progress Towards the MDGs
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Goal 4: Reduce child mortalityReduc