Table 10. Hypothetical example of the matrix of information that could be developed for each part of a river basin. The indicators would differ from river to river, and the numbers used here are merely to illustrate possible trends in indicator status. The numbers do not constitute a scoring system; rather, the specialists’ reports should be referred to for the detail represented by each numbered cell. Decisions should be based on this underlying information. Ratings of change: 1= negligible change from present; 2 = low change; 3 = moderate change; 4 = high change; 5 = very high change. Negative values indicate either that the river ecosystem is moving away from its natural state, i.e. degrading, or a compensation/mitigation cost.

Indicators
Flow scenarios reflecting increasing levels of basin development


Present
I
II
III
IV
V
VI
Development benefits







    HEP production
     0
1
1
1
2
3
3
    Crop production
     0
1
1
2
4
4
4
    Water security
     0
1
2
3
4
5
5
    National economy
     0
1
1
3
4
4
5
    Aquaculture
     0
1
2
3
3
3
3
Development costs







    Fish production
     0
-1
-1
-1
-2
-4
-5
    Water quality
     0
-1
-3
-4
-4
-5
-5
    Floodplain functions
     0
-1
-1
-2
-2
-2
-3
    Cultural and religious use of river
     0
-1
-1
-3
-4
-5
-5
    Compensation for lost resources
     0
-1
-2
-2
-3
-3
-4