Table. 2 Cost-benefit analysis of different engineering and econometric scenarios [HM Hydrological Modeling, SHM Socio-Hydrological Modeling]
Policy Scenarios | Approach | Additional Area Converted (km2) | Total Budget Spent in million dollars ($) | Area Enrolled (km2) | Total annual average NO3-N (kg) from agriculture | Change in total annual average NO3-N (kg) from agriculture | Change in nitrate per area (kg km−2) | Benefit per enrolled area ($ km−2) | Total benefits in million dollars ($) | Benefit-cost ratio |
|---|---|---|---|---|---|---|---|---|---|---|
Scenario 1 | - | 0 | 0 | 0 | 11,339,000 | 0 | ||||
Scenario 2 | HM | 1260 | 15.5 | 1260 | 10,288,000 | 1,051,000 | 830 | 17400 | 21.9 | 1.41 |
Scenario 3 | HM | 1260 | 23.3 | 1260 | 9,737,000 | 1,602,000 | 1270 | 26600 | 33.5 | 1.44 |
Scenario 4 | SHM | 50 | 0.6 | 50 | 11,297,000 | 42,000 | 900 | 18800 | 0.94 | 1.57 |
Scenario 5 | SHM | 180 | 3.4 | 330 | 11,152,000 | 187,000 | 1000 | 21300 | 3.8 | 1.12 |
