Alternative 4

Alternative 3

Alternative 2

Alternative 1

Score

Irrigation

Evaporation ponds

Deep well injection

Pump to seawater

Weight

Criteria

PTS

Rating

PTS

Rating

PTS

Rating

PTS

Rating

1, 2, 3

Economic (30%)

5.0

2.1

5.5

2.3

5.0

2.1

10.6

4.4

2.4

Construction cost

4.1

1.8

7.6

3.3

5.1

2.2

8.7

3.8

2.3

O&M

9.2

13.1

10.1

19.3

4.7

Subtotal

23.5

Maximum points estimated %

11.7

16.7

12.9

24.6

Percentages %

Environmental (35%)

7.8

2.7

9.3

3.2

8.4

2.9

7.5

2.6

2.9

Pollution impact

3.8

1.8

6.3

3.0

3.4

1.6

7.6

3.6

2.1

Sustainability

11.6

15.6

11.8

15.1

5.0

Subtotal

25.0

Maximum points estimated

16.3

21.8

16.5

21.1

Percentages %

Technical (20%)

2.9

1.9

4.2

2.8

2.6

1.7

7.1

4.7

1.5

Time of construction

5.3

2.3

4.6

2.0

4.8

2.1

9.9

4.3

2.3

Future expansion

6.4

3.2

6.2

3.1

4.4

2.2

9.0

4.5

2.0

Easy of construction

5.3

2.1

7.3

2.9

5.3

2.1

12.0

4.8

2.5

Easy of O&M

7.8

2.8

5.6

2.0

6.4

2.3

8.1

2.9

2.8

Risk

27.6

27.9

23.5

46.1

11.1

Subtotal

55.5

Maximum points estimated

10.0

10.0

8.5

16.6

Percentages %

Political social (15%)

5.6

3.5

4.5

2.8

5.4

3.4

4.3

2.7

1.6

Political constraints

7.5

3.4

4.2

1.9

7.7

3.5

6.2

2.8

2.2

Social impact

4.7

2.6

3.8

2.1

4.0

2.2

6.1

3.4

1.8

Water price acceptance

7.3

3.3

6.2

2.8

6.8

3.1

5.3

2.4

2.2

Legal requirements

25.0

18.6

23.9

21.9

7.8

Subtotal

39.0

Maximum points estimated

9.6

7.2

9.2

8.4

Percentages %

47.6%

55.7%

47.0%

70.8%

Total %