Description:
Monthly potential evaporation estimated with the Hargreaves method averaged over the Kariba reservoir.
For this purpose, temperature data was extracted from ERA5 (5th generation ECMWF atmospheric reanalysis dataset) 
and averaged over the open-water body.

Source citations:
Copernicus Climate Change Service (C3S), 2017. ERA5: Fifth generation of ECMWF atmospheric reanalyses of the global climate. Copernicus Climate Change Service Climate Data Store (CDS). 
Hargreaves, G.H., Allen, R.G., 2003. History and evaluation of hargreaves evapotranspiration equation. Journal of Irrigation and Drainage Engineering, 129(1): 53-63. DOI:https://doi.org/10.1061/(ASCE)0733-9437(2003)129:1(53)
Hargreaves, G.H., Samani, Z.A., 1985. Reference Crop Evapotranspiration from Temperature. Applied Engineering in Agriculture, 1(2): 96-99. DOI:https://doi.org/10.13031/2013.26773

1	1	1981	78.87
1	2	1981	72.05
1	3	1981	103.72
1	4	1981	120.51
1	5	1981	125.07
1	6	1981	129.84
1	7	1981	134.22
1	8	1981	143.88
1	9	1981	138.07
1	10	1981	123.52
1	11	1981	104.21
1	12	1981	93.76
1	1	1982	80.07
1	2	1982	87.89
1	3	1982	123.41
1	4	1982	131.48
1	5	1982	136.74
1	6	1982	135.81
1	7	1982	133.64
1	8	1982	143.45
1	9	1982	130.79
1	10	1982	119.20
1	11	1982	99.55
1	12	1982	94.35
1	1	1983	91.69
1	2	1983	91.43
1	3	1983	117.21
1	4	1983	136.42
1	5	1983	147.73
1	6	1983	139.84
1	7	1983	140.67
1	8	1983	141.50
1	9	1983	147.46
1	10	1983	126.91
1	11	1983	106.75
1	12	1983	76.21
1	1	1984	92.32
1	2	1984	90.24
1	3	1984	107.00
1	4	1984	124.54
1	5	1984	143.96
1	6	1984	127.27
1	7	1984	133.70
1	8	1984	143.33
1	9	1984	142.06
1	10	1984	127.19
1	11	1984	91.93
1	12	1984	77.02
1	1	1985	77.81
1	2	1985	81.69
1	3	1985	107.31
1	4	1985	121.80
1	5	1985	130.53
1	6	1985	127.96
1	7	1985	134.06
1	8	1985	137.91
1	9	1985	137.18
1	10	1985	121.38
1	11	1985	97.40
1	12	1985	72.78
1	1	1986	73.71
1	2	1986	80.75
1	3	1986	105.18
1	4	1986	110.75
1	5	1986	135.48
1	6	1986	127.05
1	7	1986	135.25
1	8	1986	149.78
1	9	1986	139.13
1	10	1986	121.56
1	11	1986	95.96
1	12	1986	82.43
1	1	1987	87.56
1	2	1987	96.78
1	3	1987	128.79
1	4	1987	143.64
1	5	1987	148.49
1	6	1987	136.73
1	7	1987	139.80
1	8	1987	145.21
1	9	1987	141.17
1	10	1987	125.79
1	11	1987	108.61
1	12	1987	75.01
1	1	1988	85.48
1	2	1988	84.23
1	3	1988	103.87
1	4	1988	126.26
1	5	1988	133.73
1	6	1988	134.85
1	7	1988	137.98
1	8	1988	147.32
1	9	1988	141.95
1	10	1988	129.49
1	11	1988	99.74
1	12	1988	81.72
1	1	1989	77.38
1	2	1989	74.46
1	3	1989	107.76
1	4	1989	118.95
1	5	1989	142.37
1	6	1989	132.94
1	7	1989	138.15
1	8	1989	146.11
1	9	1989	140.40
1	10	1989	126.54
1	11	1989	103.23
1	12	1989	91.42
1	1	1990	75.47
1	2	1990	83.35
1	3	1990	122.28
1	4	1990	132.13
1	5	1990	141.23
1	6	1990	137.61
1	7	1990	148.84
1	8	1990	141.71
1	9	1990	135.98
1	10	1990	132.26
1	11	1990	105.00
1	12	1990	86.60
1	1	1991	78.20
1	2	1991	87.78
1	3	1991	112.63
1	4	1991	126.15
1	5	1991	141.96
1	6	1991	137.93
1	7	1991	137.54
1	8	1991	148.01
1	9	1991	144.74
1	10	1991	128.83
1	11	1991	92.98
1	12	1991	83.14
1	1	1992	95.60
1	2	1992	115.00
1	3	1992	120.60
1	4	1992	136.11
1	5	1992	146.05
1	6	1992	138.37
1	7	1992	138.00
1	8	1992	139.47
1	9	1992	140.82
1	10	1992	128.19
1	11	1992	99.95
1	12	1992	82.29
1	1	1993	82.64
1	2	1993	80.59
1	3	1993	108.01
1	4	1993	126.06
1	5	1993	151.91
1	6	1993	135.99
1	7	1993	130.15
1	8	1993	141.65
1	9	1993	136.49
1	10	1993	125.37
1	11	1993	91.26
1	12	1993	83.11
1	1	1994	80.13
1	2	1994	86.88
1	3	1994	134.03
1	4	1994	143.14
1	5	1994	149.02
1	6	1994	136.49
1	7	1994	132.73
1	8	1994	140.78
1	9	1994	141.78
1	10	1994	118.70
1	11	1994	108.23
1	12	1994	92.43
1	1	1995	92.09
1	2	1995	91.14
1	3	1995	125.33
1	4	1995	143.16
1	5	1995	138.95
1	6	1995	137.13
1	7	1995	142.99
1	8	1995	143.59
1	9	1995	139.21
1	10	1995	132.19
1	11	1995	100.90
1	12	1995	78.60
1	1	1996	86.06
1	2	1996	86.62
1	3	1996	110.84
1	4	1996	126.92
1	5	1996	132.79
1	6	1996	126.88
1	7	1996	135.90
1	8	1996	145.53
1	9	1996	139.45
1	10	1996	127.16
1	11	1996	93.77
1	12	1996	80.90
1	1	1997	78.63
1	2	1997	80.00
1	3	1997	107.56
1	4	1997	119.23
1	5	1997	135.60
1	6	1997	136.34
1	7	1997	126.50
1	8	1997	143.60
1	9	1997	124.69
1	10	1997	116.86
1	11	1997	96.08
1	12	1997	82.74
1	1	1998	77.65
1	2	1998	91.17
1	3	1998	112.15
1	4	1998	132.92
1	5	1998	151.66
1	6	1998	138.27
1	7	1998	135.97
1	8	1998	134.29
1	9	1998	133.83
1	10	1998	127.21
1	11	1998	98.65
1	12	1998	73.52
1	1	1999	76.11
1	2	1999	85.35
1	3	1999	106.93
1	4	1999	126.36
1	5	1999	144.26
1	6	1999	134.65
1	7	1999	127.27
1	8	1999	138.12
1	9	1999	132.16
1	10	1999	117.27
1	11	1999	96.65
1	12	1999	86.67
1	1	2000	81.59
1	2	2000	84.99
1	3	2000	104.28
1	4	2000	121.46
1	5	2000	125.79
1	6	2000	118.24
1	7	2000	128.04
1	8	2000	133.47
1	9	2000	139.60
1	10	2000	127.25
1	11	2000	99.59
1	12	2000	77.46
1	1	2001	90.59
1	2	2001	77.62
1	3	2001	102.44
1	4	2001	124.43
1	5	2001	134.56
1	6	2001	126.53
1	7	2001	132.42
1	8	2001	147.41
1	9	2001	141.64
1	10	2001	127.76
1	11	2001	93.57
1	12	2001	85.02
1	1	2002	92.96
1	2	2002	99.40
1	3	2002	127.59
1	4	2002	129.17
1	5	2002	147.22
1	6	2002	128.72
1	7	2002	146.43
1	8	2002	138.06
1	9	2002	131.02
1	10	2002	121.29
1	11	2002	96.17
1	12	2002	86.51
1	1	2003	97.35
1	2	2003	90.21
1	3	2003	107.98
1	4	2003	126.76
1	5	2003	144.36
1	6	2003	122.89
1	7	2003	129.43
1	8	2003	142.48
1	9	2003	137.14
1	10	2003	124.93
1	11	2003	102.51
1	12	2003	85.00
1	1	2004	85.47
1	2	2004	89.48
1	3	2004	105.30
1	4	2004	118.97
1	5	2004	133.10
1	6	2004	125.08
1	7	2004	135.54
1	8	2004	147.74
1	9	2004	136.01
1	10	2004	117.53
1	11	2004	99.76
1	12	2004	78.60
1	1	2005	85.77
1	2	2005	98.98
1	3	2005	126.05
1	4	2005	142.06
1	5	2005	152.26
1	6	2005	143.17
1	7	2005	136.08
1	8	2005	150.88
1	9	2005	138.73
1	10	2005	131.24
1	11	2005	100.92
1	12	2005	75.25
1	1	2006	77.03
1	2	2006	82.38
1	3	2006	105.25
1	4	2006	126.59
1	5	2006	143.18
1	6	2006	128.89
1	7	2006	138.37
1	8	2006	139.35
1	9	2006	129.56
1	10	2006	122.11
1	11	2006	94.26
1	12	2006	87.47
1	1	2007	78.44
1	2	2007	88.15
1	3	2007	120.89
1	4	2007	128.24
1	5	2007	144.40
1	6	2007	131.90
1	7	2007	133.48
1	8	2007	145.17
1	9	2007	139.01
1	10	2007	124.14
1	11	2007	92.06
1	12	2007	66.65
1	1	2008	72.14
1	2	2008	94.91
1	3	2008	113.18
1	4	2008	133.94
1	5	2008	143.23
1	6	2008	132.55
1	7	2008	136.39
1	8	2008	145.69
1	9	2008	146.89
1	10	2008	132.28
1	11	2008	90.47
1	12	2008	75.57
1	1	2009	80.09
1	2	2009	87.73
1	3	2009	105.34
1	4	2009	126.20
1	5	2009	139.16
1	6	2009	135.72
1	7	2009	125.09
1	8	2009	138.70
1	9	2009	137.95
1	10	2009	123.67
1	11	2009	86.25
1	12	2009	78.20
1	1	2010	86.46
1	2	2010	80.51
1	3	2010	109.53
1	4	2010	121.12
1	5	2010	142.26
1	6	2010	126.69
1	7	2010	125.93
1	8	2010	137.61
1	9	2010	135.73
1	10	2010	134.51
1	11	2010	99.65
1	12	2010	75.89
1	1	2011	77.21
1	2	2011	91.48
1	3	2011	113.53
1	4	2011	129.12
1	5	2011	144.43
1	6	2011	139.74
1	7	2011	135.49
1	8	2011	140.40
1	9	2011	140.64
1	10	2011	127.13
1	11	2011	99.06
1	12	2011	85.46
1	1	2012	84.39
1	2	2012	91.83
1	3	2012	115.38
1	4	2012	125.82
1	5	2012	146.67
1	6	2012	135.02
1	7	2012	140.31
1	8	2012	143.97
1	9	2012	139.91
1	10	2012	126.40
1	11	2012	100.74
1	12	2012	74.71
1	1	2013	81.60
1	2	2013	89.54
1	3	2013	120.32
1	4	2013	136.27
1	5	2013	143.76
1	6	2013	139.00
1	7	2013	135.02
1	8	2013	144.74
1	9	2013	141.30
1	10	2013	121.71
1	11	2013	97.33
1	12	2013	80.99
1	1	2014	86.08
1	2	2014	85.51
1	3	2014	117.80
1	4	2014	119.93
1	5	2014	142.07
1	6	2014	131.38
1	7	2014	138.58
1	8	2014	141.29
1	9	2014	132.57
1	10	2014	127.89
1	11	2014	103.61
1	12	2014	80.73
1	1	2015	83.84
1	2	2015	97.01
1	3	2015	124.95
1	4	2015	112.71
1	5	2015	146.38
1	6	2015	135.17
1	7	2015	143.26
1	8	2015	149.11
1	9	2015	141.77
1	10	2015	130.18
1	11	2015	105.44
1	12	2015	95.38
1	1	2016	96.93
1	2	2016	103.15
1	3	2016	109.64
1	4	2016	128.04
1	5	2016	137.91
1	6	2016	135.45
1	7	2016	135.00
1	8	2016	142.36
1	9	2016	141.62
1	10	2016	134.54
1	11	2016	98.66
1	12	2016	84.08
1	1	2017	76.18
1	2	2017	84.30
1	3	2017	108.66
1	4	2017	116.20
1	5	2017	136.04
1	6	2017	130.69
1	7	2017	135.77
1	8	2017	141.15
1	9	2017	138.58
1	10	2017	124.32
1	11	2017	89.61
1	12	2017	84.51
1	1	2018	102.14
1	2	2018	80.00
1	3	2018	112.79
1	4	2018	126.25
1	5	2018	139.65
1	6	2018	134.63
1	7	2018	125.33
1	8	2018	152.52
1	9	2018	142.86
1	10	2018	123.46
1	11	2018	99.86
1	12	2018	89.01
1	1	2019	90.09
1	2	2019	99.19
1	3	2019	141.64
1	4	2019	131.43
1	5	2019	141.93
1	6	2019	134.12
1	7	2019	146.43
1	8	2019	145.73
1	9	2019	138.65
1	10	2019	134.57
1	11	2019	100.58
1	12	2019	94.23
1	1	2020	86.60
1	2	2020	89.77
1	3	2020	115.51
1	4	2020	139.59
1	5	2020	146.08
1	6	2020	125.18
1	7	2020	132.12