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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

October 2019 marks the beginning of the 2019/20 hydrological year.

Zambezi River flows at Chavuma steadily increased due to some rainfall activities on the catchment and closed the week under review at 99m3/s on 2nd December 2019, while the flow observed last year on the same date was 74m3/s.

From:
26 December 2019
To:
2 December 2019
Date Flow(m3/s)
Date Flow(m3/s)
26/11/201972
27/11/201976
28/11/201983
29/11/201986
30/11/201988
1/12/201992
2/12/201999
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. Accordingly, the Authority is working with stakeholders to harmonize the two rating curves to converge the discrepancy in discharge.

The Zambezi River flows at this station have been increasing due to records of rainfall activities on the catchment, closing the week under review at 211m3/s on 2nd December 2019. The flow observed on the same date last year was 257m3/s.

From:
26 December 2019
To:
2 December 2019
Date Flow(m3/s)
Date Flow(m3/s)
26/11/2019197
27/11/2019199
28/11/2019203
29/11/2019207
30/11/2019209
1/12/2019209
2/12/2019211
Nana’s Farm

Ngonye

Flows at Ngonye increased steadily due to sporadic rainfall activities being recorded around the catchment, closing the week at 246m3/s on 2nd December 2019, while last year’s flow on the same date was 226m3/s.

From:
26 December 2019
To:
2 December 2019
Date Flow(m3/s)
Date Flow(m3/s)
26/11/2019202
27/11/2019205
28/11/2019212
29/11/2019222
30/11/2019238
1/12/2019243
2/12/2019246
Ngonye

Victoria Falls/Big Tree

Flows at Victoria Falls increased during the week under review before closing at 227m3/s on 2nd December 2019. Last year on the same date, the flow was 220m3/s.

From:
26 December 2019
To:
2 December 2019
Date Flow(m3/s)
Date Flow(m3/s)
26/11/2019207
27/11/2019211
28/11/2019214
29/11/2019217
30/11/2019220
1/12/2019224
2/12/2019227
Victoria Falls/Big Tree