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Water Accounting Experiences from Southern Africa Glenn-Marie Lange The Earth Institute at Columbia University.

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Presentation on theme: "Water Accounting Experiences from Southern Africa Glenn-Marie Lange The Earth Institute at Columbia University."— Presentation transcript:

1 Water Accounting Experiences from Southern Africa Glenn-Marie Lange The Earth Institute at Columbia University

2 Natural Resource Accounting Programme in East & Southern Africa Started in 1995, currently in Phase 3 Includes Botswana, Namibia, South Africa More recently, Mozambique, Tanzania, Uganda Secretariat at the University of Pretoria, South Africa

3 Natural Resource Accounting Programme in East & Southern Africa MineralsWaterFisheriesForestsLand/Land degradation BotswanaXX NamibiaXXXpartial South AfricaXXX TanzaniaXXXX MozambiqueRegional case study UgandaXX

4 WATER: Critical Resource in Botswana, Namibia, South Africa ALL COUNTRIES CHARACTERIZED BY: Low, highly variable rainfall ( mm/year), high evapotranspiration High reliance on fossil groundwater (Botswana and Namibia) No perennial rivers entirely within a country Growing reliance on shared international rivers Regional water commissions negotiate allocations of water from intl rivers Water supply vulnerable to climate change Water is highly subsidized NEED TO MONITOR AND MANAGE WATER IN SOUTHERN AFRICA

5 What Do Policy-Makers Need from Water Accounts? Economic information to make decisions: 1.Allocation of water, water infrastructure among competing users: Economic users: agriculture-hydroelectric-municipal, etc. Ecological requirements: biodiversity-mining-tourism Meeting international requirements 2.Water pricing and economic instruments: Understand variation of water costs/treatment by region and set prices accordingly Understand impact of water tariffs on different industries and different social groups, especially the poor 3.Coordinating policy in related sectors: agriculture, rural development, tourism, etc. 4.Planning for future water requirements, water conservation & demand management

6 Water Accounts in Botswana, Namibia and South Africa Years covered: –Botswana: –Namibia: 1993 & 1996, –South Africa: 1998 and 2000 Water classified by natural source & institution that supplies water Water end-users classified by –ISIC: Botswana and Namibia –Dept of Water Affairs classification: South Africa THIS IS A PROBLEMcolleagues at Univ. of Pretoria have partially adjusted the official water accounts Geographic coverage –National water accounts: Botswana, Namibia, South Africa –Catchment-level accounts: South Africa, partial in Namibia, possible in Botswana

7 Water Classifications: Natural Source and Supplying Institution CLASSIFICATION OF NATURAL SOURCES CLASSIFICATION OF SUPPLYING INSTITUTIONS BOTSWANAGroundwater Dam storage of seasonal rivers Perennial surface water Water Utilities Corporation Dept. of Water Affairs District Councils Self-providers NAMIBIAGroundwater Dam storage of seasonal rivers Perennial surface water Recycled wastewater Seawater Namwater Municipal authorities Rural Water Supply Rural communities Self-providers: Agriculture, Mining SOUTH AFRICA Groundwater Surface water Soil water Dept. of Water Affairs and Forestry Irrigation Boards Water Boards Municipalities

8 Classification of End-Users (number of industries in each countrys water accounts) BotswanaNamibiaSouth Africa Agriculture254 Mining422 Manufacturing & utilities 5 Aggregated from 8 10 Aggregated from 20 4 Services772 Government211 Households (urban-rural) 222 Total end-users in water use accounts LossespartialyesNo

9 Data Sources for Water Use: Metered Water Use or Estimated Use? Administrative records that meter individual users By estimation (mainly agriculture) Botswana49%51% Namibia38%63% South Africa0%100%

10 SEEAW Chapter 9.B Indicators and statistics B.1 Source of pressure on water resources: Macro trends in total water use, emissions, water use by natural source and purpose, etc. Industry-level trends Technology and driving forces B.2 Potential for increasing effective supply and improving water productivity Reducing system losses B.3 Water pricing and incentives for water conservation B. 4 Sustainability: comparing water resources and water use

11 NATIONAL TRENDS: Decoupling of Growth & Water Use? Index of water use & productivity Botswana, 1992 = 1.00 Namibia: 1993 = 1.00

12 Water supply by natural source in Namibia, 2001/02 Total water supply: 395 Mm3 Total freshwater: 326 Mm3 Some groundwater from fossil sources. Nationally small, <5% of water use. Locally, 100% with few alternatives.

13 Supply of Freshwater by Supplying Institution Note: rural communities not recorded as supplying own water

14 Industry-level trends: Freshwater use by source and end-user in Namibia, 2001/02 (million cubic meters)

15 INDUSTRY-LEVEL TRENDS: ENVIRONMENTAL ECONOMIC PROFILE Distribution of water use, GDP & employment by industry in Namibia, 2001

16 Water Productivity by Industry in Namibia, 1997 & 2000: GDP per m3 water use (constant 1995 prices)

17 Understanding Driving Forces What drives water demand? Final use by households + total water needed to produce goods for Final Demand: –Household consumption –Government expenditures –Investment –Exports Total water requirements include direct + upstream water, that is, the water used to produce all the inputs to production. calculated using Input-Output model

18 Direct and Total Water Requirements by Industry: Namibia, 2001/02

19 Losses & Unaccounted for Water in Namibia, 2000

20 Average cost of supply by Institution and source of water in Namibia, 2000

21 Water Subsidies by NamWater, the bulk water supplier (provides 40% of all water; Tariffs – Supply Costs) Tariff-Supply Cost Water Productivity $/m3 water use$VA/m3 water Crop irrigation Livestock Mining Manufacturing Construction Services Government Sales to other water suppliers0.68NA

22 CROSS COUNTRY COMPARISONS: Water productivity in Botswana, Namibia, and South Africa, 2000 (rands of value-added per cubic meter of water used) BotswanaNamibia South Africa Agricul- ture 1473 Mining Manufac- turing Services Govern- ment National Level By Industry

23 Water subsidies in Botswana, Namibia and South Africa, 2000

24 Water management & policy analysis Trade & the environment Managing an international river basin

25 International Trade & Water Use Are water-scarce countries exporting water? How much can imports reduce pressure on water demand? Virtual Water is the water embodied in imported goods countries can meet some of their water needs by importing water-intensive goods rather than producing the goods themselves Net balance of trade in virtual water determined by Volume of imports compared to exports Total water intensity of imports compared to exports

26 International Trade & Water Use How much does Intl Trade drive water demand in Namibia, Botswana and South Africa? Export promotion is a major part of national economic development strategy Exports are dependent on primary & processed primary commodities 76% Botswana: mostly mining 79% Namibia: agriculture, mining, fisheries 47% South Africa: agriculture, forestry, mining Primary products, especially agriculture and processed agricultural products can be water intensive

27 Method of Analysis Use Input-Output analysis to calculate direct and total water requirements for exports & imports Exports are no problem, use countries water accounts Problem: what is the water content of imports from another country? Botswana & Namibia get most of their imports from South Africa, so we use South Africas water accounts & the results are accurate But South Africa imports mainly from other countries…so –Assume other countries have same water intensity as South Africa –Use South Africas water accounts THIS ASSUMPTION IS WIDELY USED IN ALL COUNTRIES We can only calculate trade in water accurately when ALL countries have water accounts

28 International Trade & Water Use Are water-scarce countries exporting water? Net imports of water in Botswana, Namibia, South Africa in 1998

29 Why is South Africa a net exporter of water? Its volume of exports is slightly > imports, but mainly because water intensity of exports > imports Water intensity of trade summed up over products (m3 per 1000 rands of imports or exports)

30 RIVER BASIN ACCOUNTS Orange River: How should water be shared by the 4 riparian countries? Lesotho South Africa Botswana Namibia

31 Supply & use of water by riparian states in the Orange River Basin

32 Water productivity among riparian states in the Orange River Basin (rands GDP/m3 of water used)

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