A mixed distribution approach for low-flow frequency  analysis – Part 2: Comparative assessment of a mixed  probability vs. copula-based dependence framework

Laaha, Gregor

doi:10.5194/hess-27-2019-2023

Articles | Volume 27, issue 10

https://doi.org/10.5194/hess-27-2019-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/hess-27-2019-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 27, issue 10

Research article

|

26 May 2023

Research article |

| 26 May 2023

A mixed distribution approach for low-flow frequency analysis – Part 2: Comparative assessment of a mixed probability vs. copula-based dependence framework

Gregor Laaha

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Total article views: 3,617 (including HTML, PDF, and XML)

HTML	PDF	XML	Total	BibTeX	EndNote
2,657	796	164	3,617	158	187

HTML: 2,657
PDF: 796
XML: 164
Total: 3,617
BibTeX: 158
EndNote: 187

Views and downloads (calculated since 27 Oct 2022)

Month	HTML	PDF	XML	Total
Oct 2022	122	24	4	150
Nov 2022	112	22	3	137
Dec 2022	43	15	3	61
Jan 2023	27	3	0	30
Feb 2023	57	10	4	71
Mar 2023	21	12	1	34
Apr 2023	30	13	0	43
May 2023	178	38	3	219
Jun 2023	118	16	3	137
Jul 2023	37	20	4	61
Aug 2023	22	13	1	36
Sep 2023	13	9	0	22
Oct 2023	20	12	1	33
Nov 2023	18	13	4	35
Dec 2023	14	9	2	25
Jan 2024	46	4	0	50
Feb 2024	19	11	1	31
Mar 2024	12	19	3	34
Apr 2024	14	9	3	26
May 2024	21	16	6	43
Jun 2024	18	6	3	27
Jul 2024	143	4	3	150
Aug 2024	32	5	3	40
Sep 2024	18	6	0	24
Oct 2024	12	5	3	20
Nov 2024	18	11	0	29
Dec 2024	13	4	1	18
Jan 2025	31	15	0	46
Feb 2025	15	8	0	23
Mar 2025	12	10	0	22
Apr 2025	19	8	2	29
May 2025	29	6	1	36
Jun 2025	59	26	0	85
Jul 2025	40	20	2	62
Aug 2025	35	9	4	48
Sep 2025	109	19	2	130
Oct 2025	59	32	1	92
Nov 2025	87	47	7	141
Dec 2025	84	27	6	117
Jan 2026	118	19	5	142
Feb 2026	283	17	1	301
Mar 2026	54	30	4	88
Apr 2026	48	42	3	93
May 2026	50	21	1	72
Jun 2026	11	9	1	21
Jul 2026	98	14	4	116
Aug 2026	36	18	7	61
Sep 2026	135	30	45	210
Oct 2026	47	40	9	96

Cumulative views and downloads (calculated since 27 Oct 2022)

Month	HTML	PDF	XML	Total
Oct 2022	122	24	4	150
Nov 2022	112	22	3	137
Dec 2022	43	15	3	61
Jan 2023	27	3	0	30
Feb 2023	57	10	4	71
Mar 2023	21	12	1	34
Apr 2023	30	13	0	43
May 2023	178	38	3	219
Jun 2023	118	16	3	137
Jul 2023	37	20	4	61
Aug 2023	22	13	1	36
Sep 2023	13	9	0	22
Oct 2023	20	12	1	33
Nov 2023	18	13	4	35
Dec 2023	14	9	2	25
Jan 2024	46	4	0	50
Feb 2024	19	11	1	31
Mar 2024	12	19	3	34
Apr 2024	14	9	3	26
May 2024	21	16	6	43
Jun 2024	18	6	3	27
Jul 2024	143	4	3	150
Aug 2024	32	5	3	40
Sep 2024	18	6	0	24
Oct 2024	12	5	3	20
Nov 2024	18	11	0	29
Dec 2024	13	4	1	18
Jan 2025	31	15	0	46
Feb 2025	15	8	0	23
Mar 2025	12	10	0	22
Apr 2025	19	8	2	29
May 2025	29	6	1	36
Jun 2025	59	26	0	85
Jul 2025	40	20	2	62
Aug 2025	35	9	4	48
Sep 2025	109	19	2	130
Oct 2025	59	32	1	92
Nov 2025	87	47	7	141
Dec 2025	84	27	6	117
Jan 2026	118	19	5	142
Feb 2026	283	17	1	301
Mar 2026	54	30	4	88
Apr 2026	48	42	3	93
May 2026	50	21	1	72
Jun 2026	11	9	1	21
Jul 2026	98	14	4	116
Aug 2026	36	18	7	61
Sep 2026	135	30	45	210
Oct 2026	47	40	9	96

Viewed (geographical distribution)

Total article views: 3,617 (including HTML, PDF, and XML) Thereof 3,522 with geography defined and 95 with unknown origin.

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Short summary

In seasonal climates with a warm and a cold season, low flows are generated by different processes so that return periods used as a measure of event severity will be inaccurate. We propose a novel mixed copula estimator that is shown to outperform previous calculation methods. The new method is highly relevant for a wide range of European river flow regimes and should be used by default.