1. 05.04.2004 | Slide 1 SEEAW Emission Accounts Calculation Examples and Supplementary Information Chile, 1-4 June, 2009 Technical Workshop on the Preparation of Water Accounts in Latin America Chile, 1-4 June, 2009 Jeremy Webb

2. Fresh surface water WWTP Sewerage (ISIC 37) Chemical production (ISIC 20) Enterprise Households 70 30 10 Gross emission ISIC 20: Gross emission Households: Net emissions ISIC 20: Net emissions Households: 70 30 + 60 = 90 Removal rate WWTP:1 - 10/(70+30) = 90% Reallocated load ISIC 20:70 * (1 – 0.90) = 7 Reallocated load Househ.:30 * (1 – 0.90) = 3 60 7 3 + 60 = 63 Calculation steps CALCULATION EXAMPLE I

3. Gross emission ISIC 20: Gross emission Households: Net emissions ISIC 20: Net emissions Households: 70 30 + 60 = 90 7 3 + 60 = 63 70 30 90 73 763 0 0 0 0 0 60 0 0 100 60 160 60 70 0 0 10 CALCULATION EXAMPLE I Table A. Gross and net emissions 0 0 0 0 0 0 0 0 0 70 0 0 0 7 0 0 7 WWTP ISIC 37 ISIC 20 Enterprise Households 70 30 10 60

4. WWTP Sewerage (ISIC 37) Chemical production (ISIC 20) Enterprise Households 70 30 10 60 10 0 0 0 0 CALCULATION EXAMPLE I Fresh surface water

5. Sea Chemical production with in situ treatment (ISIC 20) Sewerage (ISIC 37) Households Agriculture (ISIC 01) 100 20 80 150 5 40 10 200 0 50 150 50 80 Reduction rate: 80% Fresh surface water 200 280 16 216 CALCULATION EXAMPLE II 5 5 0 0 100 5 105 20 25 0 0 10 20 10 30 4 14 5 155 210 60 200 215 415 40 255 0 0 0 0 0 0 0 0 0 5 155 200 50 180 205 385 36 241

6. Sea Chemical production with in situ treatment (ISIC 20) Sewerage (ISIC 37) Households Agriculture (ISIC 01) 100 20 80 150 5 40 10 50 Reduction rate: 80% Fresh surface water CALCULATION EXAMPLE II 40 0 0 0 0

7. CALCULATION EXAMPLE III Including urban runoff collected by sewerage. See also Table 4.2 SEEAW, Final Draft (slightly changed)

8. 05.04.2004 | Slide 8 Table A: Supplementary Information

9. 05.04.2004 | Slide 9

10. 05.04.2004 | Slide 10 Supplementary Information on Sewage Sludge