Although there is an increase in This flow regime meets the REC of D for giii8 (Duiwenhoks total groundwater use for this scenario, the groundwater status River). does not change in any quaternary The river node associated with catchment. Duiwenhoks wetland remains in an unacceptable condition. Despite flowing relatively naturally, a range of agricultural impacts such as clearing of riparian F12 Duiwenhoks III vegetation for cultivation and infilling in cultivated areas have meant that the rivers of the Duiwenhoks and Hessequa are in moderate to poor condition. Flow requirements are met for the REC of C/D at giii7 (Goukou River) with 80% of natural flows. The ecological condition of the Duiwenhoks and the Goukou estuaries are B and C, I18 Hessequa III respectively, which is lower than the Recommended Ecological Condition of A and B, respectively. To achieve this scenario into the Ysterdams, Donkies and upper future, the groundwater status Touws rivers at the upper increases compared to PES in two reaches of this region and the quaternary catchments. These two upper Groot River remain in catchments are J12B and J13C; poorer condition. located at the northwest (upstream) and southeast (downstream) extremities of the catchment respectively. The increase in groundwater stress in J12B is E8 Touws III significant, with an increase in its use/ recharge ratio from 2 (‘stress’) to 100%, corresponding for a change in status category from I to III. The change at J13C is moderate. None of the quaternary catchments impacted by a change in category have been identified as having a high GWBF/EWR ratio. There is a minor increase in Most river nodes are in a good groundwater use in this scenario condition. C6 Gamka-Buffels II (compared to PES), however there is no change in groundwater status
F12 Duiwenhoks III This flow regime meets the REC of D for giii8 (Duiwenhoks River). The river node associated with Duiwenhoks wetland remains in an unacceptable condition. Despite flowing relatively naturally, a range of agricultural impacts such as clearing of riparian vegetation for cultivation and infilling in cultivated areas have meant that the rivers of the Duiwenhoks and Hessequa are in moderate to poor condition. Flow requirements are met for the REC of C/D at giii7 (Goukou River) with 80% of natural flows. Although there is an increase in total groundwater use for this scenario, the groundwater status does not change in any quaternary catchment. I18 Hessequa III The ecological condition of the Duiwenhoks and the Goukou estuaries are B and C, respectively, which is lower than the Recommended Ecological Condition of A and B, respectively. E8 Touws III Ysterdams, Donkies and upper Touws rivers at the upper reaches of this region and the upper Groot River remain in poorer condition. To achieve this scenario into the future, the groundwater status increases compared to PES in two quaternary catchments. These two catchments are J12B and J13C; located at the northwest (upstream) and southeast (downstream) extremities of the catchment respectively. The increase in groundwater stress in J12B is significant, with an increase in its use/ recharge ratio (‘stress’) from 2 to 100%, corresponding for a change in status category from I to III. The change at J13C is moderate. None of the quaternary catchments impacted by a change in category have been identified as having a high GWBF/EWR ratio. C6 Gamka-Buffels II Most river nodes are in a good condition. There is a minor increase in groundwater use in this scenario (compared to PES), however there is no change in groundwater status
Evaluation%20of%20Scenarios%20Report%20(Draft)%20%20(Dec).docx