Accounting for environmental flow requirements in global water assessments

Pastor, A. V.; Ludwig, F.; Biemans, H.; Hoff, H.; Kabat, P.

doi:10.5194/hess-18-5041-2014

Articles | Volume 18, issue 12

https://doi.org/10.5194/hess-18-5041-2014

© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/hess-18-5041-2014

© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 18, issue 12

Research article

|

11 Dec 2014

Research article |

| 11 Dec 2014

Accounting for environmental flow requirements in global water assessments

A. V. Pastor, F. Ludwig, H. Biemans, H. Hoff, and P. Kabat

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Total article views: 14,418 (including HTML, PDF, and XML)

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Views and downloads (calculated since 10 Dec 2013)

Month	HTML	PDF	XML	Total
Dec 2013	109	101	17	227
Jan 2014	57	43	8	108
Feb 2014	64	47	6	117
Mar 2014	41	23	8	72
Apr 2014	35	22	10	67
May 2014	26	19	8	53
Jun 2014	34	29	3	66
Jul 2014	25	20	0	45
Aug 2014	27	20	6	53
Sep 2014	41	13	3	57
Oct 2014	25	13	5	43
Nov 2014	38	28	1	67
Dec 2014	144	144	11	299
Jan 2015	102	64	3	169
Feb 2015	49	25	5	79
Mar 2015	44	28	5	77
Apr 2015	37	19	1	57
May 2015	21	28	3	52
Jun 2015	45	21	0	66
Jul 2015	40	23	4	67
Aug 2015	26	24	1	51
Sep 2015	27	23	7	57
Oct 2015	44	39	2	85
Nov 2015	50	27	0	77
Dec 2015	16	21	2	39
Jan 2016	49	40	2	91
Feb 2016	31	29	2	62
Mar 2016	41	31	12	84
Apr 2016	21	29	0	50
May 2016	17	34	1	52
Jun 2016	10	11	0	21
Jul 2016	12	11	2	25
Aug 2016	15	21	0	36
Sep 2016	10	12	0	22
Oct 2016	15	24	1	40
Nov 2016	12	16	0	28
Dec 2016	11	15	0	26
Jan 2017	29	21	2	52
Feb 2017	16	21	2	39
Mar 2017	33	23	3	59
Apr 2017	35	23	1	59
May 2017	27	29	3	59
Jun 2017	39	18	4	61
Jul 2017	24	14	0	38
Aug 2017	12	20	2	34
Sep 2017	16	40	0	56
Oct 2017	17	31	0	48
Nov 2017	21	31	0	52
Dec 2017	17	26	1	44
Jan 2018	15	26	0	41
Feb 2018	27	32	1	60
Mar 2018	16	41	0	57
Apr 2018	22	24	0	46
May 2018	31	32	1	64
Jun 2018	41	39	1	81
Jul 2018	50	36	2	88
Aug 2018	46	42	1	89
Sep 2018	36	37	0	73
Oct 2018	56	46	6	108
Nov 2018	46	45	2	93
Dec 2018	31	28	0	59
Jan 2019	41	25	0	66
Feb 2019	33	25	1	59
Mar 2019	33	31	0	64
Apr 2019	40	24	0	64
May 2019	78	35	3	116
Jun 2019	55	35	0	90
Jul 2019	53	37	0	90
Aug 2019	55	43	0	98
Sep 2019	43	33	0	76
Oct 2019	36	26	1	63
Nov 2019	33	39	3	75
Dec 2019	46	31	2	79
Jan 2020	49	18	1	68
Feb 2020	70	26	1	97
Mar 2020	60	20	1	81
Apr 2020	42	38	0	80
May 2020	41	16	1	58
Jun 2020	39	24	1	64
Jul 2020	55	31	12	98
Aug 2020	40	22	8	70
Sep 2020	62	21	0	83
Oct 2020	39	29	0	68
Nov 2020	61	30	0	91
Dec 2020	44	27	1	72
Jan 2021	54	31	2	87
Feb 2021	44	30	0	74
Mar 2021	57	36	0	93
Apr 2021	53	44	0	97
May 2021	57	48	1	106
Jun 2021	48	35	1	84
Jul 2021	43	25	1	69
Aug 2021	46	44	3	93
Sep 2021	65	63	0	128
Oct 2021	62	74	2	138
Nov 2021	72	64	3	139
Dec 2021	57	45	3	105
Jan 2022	54	51	2	107
Feb 2022	53	43	2	98
Mar 2022	63	48	0	111
Apr 2022	62	53	2	117
May 2022	63	63	2	128
Jun 2022	62	47	1	110
Jul 2022	62	33	0	95
Aug 2022	88	50	1	139
Sep 2022	66	51	0	117
Oct 2022	76	38	0	114
Nov 2022	96	90	4	190
Dec 2022	72	41	0	113
Jan 2023	89	73	5	167
Feb 2023	76	50	1	127
Mar 2023	116	85	0	201
Apr 2023	56	71	0	127
May 2023	65	63	2	130
Jun 2023	61	53	2	116
Jul 2023	67	49	3	119
Aug 2023	73	59	2	134
Sep 2023	138	70	1	209
Oct 2023	201	54	1	256
Nov 2023	170	51	3	224
Dec 2023	84	46	0	130
Jan 2024	83	44	4	131
Feb 2024	133	58	3	194
Mar 2024	90	64	3	157
Apr 2024	71	41	5	117
May 2024	100	57	8	165
Jun 2024	66	58	4	128
Jul 2024	86	49	4	139
Aug 2024	86	41	3	130
Sep 2024	68	27	0	95
Oct 2024	95	26	0	121
Nov 2024	69	33	2	104
Dec 2024	108	46	4	158
Jan 2025	108	35	4	147
Feb 2025	107	40	4	151
Mar 2025	109	58	1	168
Apr 2025	191	42	1	234
May 2025	160	39	0	199
Jun 2025	176	41	0	217
Jul 2025	151	44	2	197
Aug 2025	134	49	1	184
Sep 2025	162	61	3	226
Oct 2025	125	60	2	187
Nov 2025	145	74	2	221
Dec 2025	26	13	0	39

Cumulative views and downloads (calculated since 10 Dec 2013)

Month	HTML	PDF	XML	Total
Dec 2013	109	101	17	227
Jan 2014	57	43	8	108
Feb 2014	64	47	6	117
Mar 2014	41	23	8	72
Apr 2014	35	22	10	67
May 2014	26	19	8	53
Jun 2014	34	29	3	66
Jul 2014	25	20	0	45
Aug 2014	27	20	6	53
Sep 2014	41	13	3	57
Oct 2014	25	13	5	43
Nov 2014	38	28	1	67
Dec 2014	144	144	11	299
Jan 2015	102	64	3	169
Feb 2015	49	25	5	79
Mar 2015	44	28	5	77
Apr 2015	37	19	1	57
May 2015	21	28	3	52
Jun 2015	45	21	0	66
Jul 2015	40	23	4	67
Aug 2015	26	24	1	51
Sep 2015	27	23	7	57
Oct 2015	44	39	2	85
Nov 2015	50	27	0	77
Dec 2015	16	21	2	39
Jan 2016	49	40	2	91
Feb 2016	31	29	2	62
Mar 2016	41	31	12	84
Apr 2016	21	29	0	50
May 2016	17	34	1	52
Jun 2016	10	11	0	21
Jul 2016	12	11	2	25
Aug 2016	15	21	0	36
Sep 2016	10	12	0	22
Oct 2016	15	24	1	40
Nov 2016	12	16	0	28
Dec 2016	11	15	0	26
Jan 2017	29	21	2	52
Feb 2017	16	21	2	39
Mar 2017	33	23	3	59
Apr 2017	35	23	1	59
May 2017	27	29	3	59
Jun 2017	39	18	4	61
Jul 2017	24	14	0	38
Aug 2017	12	20	2	34
Sep 2017	16	40	0	56
Oct 2017	17	31	0	48
Nov 2017	21	31	0	52
Dec 2017	17	26	1	44
Jan 2018	15	26	0	41
Feb 2018	27	32	1	60
Mar 2018	16	41	0	57
Apr 2018	22	24	0	46
May 2018	31	32	1	64
Jun 2018	41	39	1	81
Jul 2018	50	36	2	88
Aug 2018	46	42	1	89
Sep 2018	36	37	0	73
Oct 2018	56	46	6	108
Nov 2018	46	45	2	93
Dec 2018	31	28	0	59
Jan 2019	41	25	0	66
Feb 2019	33	25	1	59
Mar 2019	33	31	0	64
Apr 2019	40	24	0	64
May 2019	78	35	3	116
Jun 2019	55	35	0	90
Jul 2019	53	37	0	90
Aug 2019	55	43	0	98
Sep 2019	43	33	0	76
Oct 2019	36	26	1	63
Nov 2019	33	39	3	75
Dec 2019	46	31	2	79
Jan 2020	49	18	1	68
Feb 2020	70	26	1	97
Mar 2020	60	20	1	81
Apr 2020	42	38	0	80
May 2020	41	16	1	58
Jun 2020	39	24	1	64
Jul 2020	55	31	12	98
Aug 2020	40	22	8	70
Sep 2020	62	21	0	83
Oct 2020	39	29	0	68
Nov 2020	61	30	0	91
Dec 2020	44	27	1	72
Jan 2021	54	31	2	87
Feb 2021	44	30	0	74
Mar 2021	57	36	0	93
Apr 2021	53	44	0	97
May 2021	57	48	1	106
Jun 2021	48	35	1	84
Jul 2021	43	25	1	69
Aug 2021	46	44	3	93
Sep 2021	65	63	0	128
Oct 2021	62	74	2	138
Nov 2021	72	64	3	139
Dec 2021	57	45	3	105
Jan 2022	54	51	2	107
Feb 2022	53	43	2	98
Mar 2022	63	48	0	111
Apr 2022	62	53	2	117
May 2022	63	63	2	128
Jun 2022	62	47	1	110
Jul 2022	62	33	0	95
Aug 2022	88	50	1	139
Sep 2022	66	51	0	117
Oct 2022	76	38	0	114
Nov 2022	96	90	4	190
Dec 2022	72	41	0	113
Jan 2023	89	73	5	167
Feb 2023	76	50	1	127
Mar 2023	116	85	0	201
Apr 2023	56	71	0	127
May 2023	65	63	2	130
Jun 2023	61	53	2	116
Jul 2023	67	49	3	119
Aug 2023	73	59	2	134
Sep 2023	138	70	1	209
Oct 2023	201	54	1	256
Nov 2023	170	51	3	224
Dec 2023	84	46	0	130
Jan 2024	83	44	4	131
Feb 2024	133	58	3	194
Mar 2024	90	64	3	157
Apr 2024	71	41	5	117
May 2024	100	57	8	165
Jun 2024	66	58	4	128
Jul 2024	86	49	4	139
Aug 2024	86	41	3	130
Sep 2024	68	27	0	95
Oct 2024	95	26	0	121
Nov 2024	69	33	2	104
Dec 2024	108	46	4	158
Jan 2025	108	35	4	147
Feb 2025	107	40	4	151
Mar 2025	109	58	1	168
Apr 2025	191	42	1	234
May 2025	160	39	0	199
Jun 2025	176	41	0	217
Jul 2025	151	44	2	197
Aug 2025	134	49	1	184
Sep 2025	162	61	3	226
Oct 2025	125	60	2	187
Nov 2025	145	74	2	221
Dec 2025	26	13	0	39

Latest update: 06 Dec 2025

Short summary

Freshwater ecosystems encompass the most threatened species on earth. Environmental flow requirements need to be addressed globally to provide sufficient water for humans and nature. We present a comparison of five environmental flow methods validated with locally calculated EFRs. We showed that methods based on monthly average flow such as the variable monthly flow method are more reliable than methods based on annual thresholds. A range of EFRs was calculated for large river basins.