Hydrology Banner

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 are in recession.  The end of the week flow observed on 20th May 2019 is 283m3/s, while the flow observed last year on the same date was 1,020m3/s. The current flows are trending those of 1995/96 which is so far the lowest record in 50 years.

From:
14 May 2019
To:
20 May 2019
Date Flow(m3/s)
14/05/2019331
15/05/2019325
16/05/2019314
17/05/2019304
18/05/2019298
19/05/2019289
20/05/2019283

Nana's Farm

Nana’s Farm Gauge Station is located about 33km upstream of Victoria Falls.  The Zambezi River flows at Nana’s Farm have been declining and closed the week under review at 1,009m3/s on 20th May 2019, while the flow observed last year on the same date was 4,352m3/s.

From:
14 May 2019
To:
20 May 2019
Date Flow(m3/s)
14/05/20191,030
15/05/20191,027
16/05/20191,024
17/05/20191,022
18/05/20191,019
19/05/20191,014
20/05/20191,009

Ngonye

Flows at Ngonye have been decreasing and closed the week at 1,047 m3/s on 20th May 2019, while last year’s flow on the same date was 3,820m3/s.

From:
14 May 2019
To:
20 May 2019
Date Flow(m3/s)
14/05/20191,094
15/05/20191,087
16/05/20191,080
17/05/20191,073
18/05/20191,064
19/05/20191,056
20/05/20191,047

Victoria Falls/Big Tree

Flows at Victoria Falls are now in recession having peaked at 1,175m3/s on 8th May 2019 (the 2017/18 peak was 4,675m3/s on 16th May 2018). The end of week flow on 20th May 2019 was 1,052m3/s.  Last year on the same date, the flow was 4,532m3/s.  

From:
20 May 2019
To:
20 May 2019
Date Flow(m3/s)
14/05/20191,098
15/05/20191,089
16/05/20191,080
17/05/20191,070
18/05/20191,070
19/05/20191,061
20/05/20191,052