A global hydrological simulation to specify the sources of water used by humans

Hanasaki, Naota; Yoshikawa, Sayaka; Pokhrel, Yadu; Kanae, Shinjiro

doi:https://doi.org/10.5194/hess-22-789-2018

Articles | Volume 22, issue 1

https://doi.org/10.5194/hess-22-789-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/hess-22-789-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 22, issue 1

Research article

|

29 Jan 2018

Research article |

| 29 Jan 2018

A global hydrological simulation to specify the sources of water used by humans

Naota Hanasaki, Sayaka Yoshikawa, Yadu Pokhrel, and Shinjiro Kanae

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Final revised paper (published on 29 Jan 2018)
Supplement to the final revised paper
Preprint (discussion started on 13 Jun 2017)
Supplement to the preprint

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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- Supplement

RC1: 'referee comment', Anonymous Referee #1, 23 Jun 2017
- AC1: 'Response to Reviewer 1', Naota Hanasaki, 06 Sep 2017
RC2: 'A global hydrological simulation to specify the sources of water used by humans', Anonymous Referee #2, 12 Jul 2017
- AC2: 'Response to Reviewer 2', Naota Hanasaki, 06 Sep 2017
RC3: 'Review of Hanaski et al., A global hydrological simulation model to specify the sources of water used by humans', Anonymous Referee #3, 17 Jul 2017
- AC3: 'Response to Reviewer 3', Naota Hanasaki, 06 Sep 2017

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

ED: Reconsider after major revisions (further review by Editor and Referees) (22 Sep 2017) by Shraddhanand Shukla

AR by Naota Hanasaki on behalf of the Authors (22 Sep 2017) Author's response Manuscript

ED: Referee Nomination & Report Request started (03 Oct 2017) by Shraddhanand Shukla

RR by Anonymous Referee #1 (23 Oct 2017)

Suggestions for revision or reasons for rejection

General comments:
I very much thank the authors for taking the time to answering all my questions in details and even doing an additional simulation with their model. For the vast majority of questions, I am very satisfied with the answers. Still, some small issues remain:

R1-S2/S8: It might be me, but I still don’t get this part. Logically, I assume that your newly developed local reservoir scheme replaced or modified the one already existing in H08. This means your new local reservoir scheme is used, but the one from the original H08 is not (aalthough the new might be based on the old). However, you keep phrasing it the other way around: ‘… the local reservoir scheme was replaced with that of the original H08 model …’ (in contrast to: … the local reservoir scheme replaced that of the original H08 model… ), which implies your newly developed local reservoir scheme is not used in the model. If this would be really the case, there would be no point in describing the new scheme at all. Sorry for picking at this point, but considering the values in the newly provided table S4, it seems to be important to know exactly which scheme was used. As shown by your numbers, for river discharge in heavily human affected basins, even NAT simulations slightly outperform the ORG simulations. Thus, a reader would want to know whether the improvements in ALL result from modifications of the local reservoir scheme itself, by balancing its error with your new, additional schemes or by emergent effects of using all of the schemes together.

R1-S9: In my view, a complex mathematical relation is rather a reason to publish it than to skip it. I see how you don’t want to confuse readers by adding it to the main text, but I would urge you to consider adding it to the appendix or supplements.

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RR by Anonymous Referee #3 (01 Nov 2017)

ED: Publish subject to revisions (further review by editor and referees) (16 Nov 2017) by Shraddhanand Shukla

AR by Naota Hanasaki on behalf of the Authors (17 Nov 2017) Author's response Manuscript

ED: Referee Nomination & Report Request started (28 Nov 2017) by Shraddhanand Shukla

RR by Anonymous Referee #1 (29 Nov 2017)

ED: Publish as is (29 Nov 2017) by Shraddhanand Shukla

AR by Naota Hanasaki on behalf of the Authors (30 Nov 2017)

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Short summary

Six schemes were added to the H08 global hydrological model (GHM) to represent human water abstraction more accurately and ensure that all water fluxes and storage are traceable in each grid cell at a daily interval. The schemes of local reservoirs, aqueduct water transfer, and seawater desalination were incorporated into GHMs for the first time, to the best of our knowledge. H08 has become one of the most detailed GHMs for attributing water sources available to humanity.