Using the data for TAMA in Table 2.5.1, if the agricultural sector demand were decreased to 60 × 106 m3/year what effect would this have on the groundwater overdraft?
Table 2.5.1 The Year 1995 TAMA Water Budget (Demand and Supply)
Demand (106 m3/year) |
| Supply (106 m3/year) | ||
CAP water | Effluent | Groundwater | ||
Municipal sector | 191.8 | 0.12 | 9.50 | 182.2 |
Agricultural sector | 120.9 | 0 | 2.22 | 118.7 |
Industrial sector | 74.3 | 0 | 0.99 | 73.3 |
Loss due to evaporation | 4.56 | 0 | 0 | 4.56 |
Totals: | 392 | 0.12 | 12.7 | 378.7 |
Groundwater use |
|
|
| 378.7 |
(Less) Net natural recharge |
|
|
| −75.0 |
(Less) Incidental recharge1 |
|
|
| −101.5 |
Groundwater overdraft |
|
|
| 202.2 |
1Incidental recharge arises from fractional infiltration of water demands in municipal, agricultural, and industrial sectors.
Source: Arnold and Arnold (2009).
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