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River Flows

The hydrometric network used for the control and day to day operations of the Kariba reservoir comprise of thirteen stations where water levels are monitored daily. Flow measurements are carried out at eight of these stations which include the Victoria Falls, one of the key stations on the Zambezi River. Coincidentally, the maximum flow recorded at Victoria Falls was during the early construction phase of Kariba Dam in March 1958 at 10,000 cubic metres per second.  The lowest flows recorded to date at Victoria Falls were during the 1995/96 season which had an annual mean flow of 390 cubic metres per second, whereas the Long Term Mean Annual flow at Victoria Falls is 1,100 cubic metres per second.

FLOWS AT SELECTED STATIONS:

Chavuma

Zambezi River flows at Chavuma continued increasing before closing the period under review at 5,825m3/s on 6th April 2020, while the flow observed last year on the same date was 695m3/s. It is quite evident that Chavuma will peak within a few todays time.

From:
24 March 2020
To:
6 April 2020
DateFlow (m3/s) 2020Flow (m3/s) 2019
24/3/20203952752
25/3/20204061745
26/3/20204239738
27/3/20204559732
28/3/20204858730
29/3/20205014729
30/3/20205143729
31/3/20205290729
1/4/20205423731
2/4/20205450728
3/4/20205573721
4/4/20205715709
5/4/20205805704
6/4/20205825695
chavuma

Nana's Farm

Nana’s Farm Gauge Station is located about 33km upstream of Victoria Falls with practically no significant flow contribution between the two stations.

The Zambezi River flows at this station peaked at 4,149m3/s on 31st March 2020 before dropping to 3,913m3/s on 6th April 2020. The flow observed on the same date last year was 896m3/s. A second peak is expected here too.

From:
24 March 2020
To:
6 April 2020
DateFlow (m3/s) 2020Flow (m3/s) 2019
24/3/20203390839
25/3/20203582843
26/3/20203754848
27/3/20203903851
28/3/20204013853
29/3/20204082860
30/3/20204131863
31/3/20204149870
1/4/20204125874
2/4/20204101877
3/4/20204019881
4/4/20203966888
5/4/20203942893
6/4/20203913896
nana

Ngonye

Flows at Ngonye reached their first peak at 4,374m3/s on 23rd March 2020.  The flow end of the review period was 3,791m3/s on 6th April 2020, while last year’s flow on the same date was about three times lower at 1,064m3/s. It is quite evident that a second peak is imminent as another wave of flood will soon be reaching the already full Barotse Flood Plains in a few days’ time.

From:
24 March 2020
To:
6 April 2020
DateFlow (m3/s) 2020Flow (m3/s) 2019
24/3/20204352973
25/3/20204324983
26/3/20204280987
27/3/20204199999
28/3/202040981004
29/3/202040551014
30/3/202039881012
31/3/202039661007
1/4/202038811033
2/4/202038471038
3/4/202038151043
4/4/202037861047
5/4/202037861054
6/4/202037911064
ngonye

Victoria Falls/Big Tree

Flows at Victoria Falls have continued to increase steadily, peaking at 4,289m3/s on 31st March 2020 before dropping to 3,922m3/s on 6th April 2020. Last year on the same date, the flow was 863m3/s. The Zambezi River flows at all stations including the Victoria Falls are well above the long-term mean. A second peak is expected here too.

From:
24 March 2020
To:
6 April 2020
DateFlow (m3/s) 2020Flow (m3/s) 2019
24/3/20203364824
25/3/20203582816
26/3/20203730808
27/3/20203890800
28/3/20204053793
29/3/20204187800
30/3/20204255808
31/3/20204289816
1/4/20204255824
2/4/20204153831
3/4/20204086839
4/4/20204020847
5/4/20203954855
6/4/20203922863
vic falls