the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Using StorAge Selection functions to quantify ecohydrological controls on the time-variant age of evapotranspiration, soil water, and recharge
Abstract. Quantifying ecohydrological controls on soil water availability is essential to understand temporal variations in catchment storage. Soil water is subject to numerous time-variable fluxes (evaporation, root-uptake, and recharge), each with different water ages which in turn affect the age of water in storage. Here, we adapt StorAge Selection (SAS) function theory to investigate water flow in soils and identify soil evaporation and root-water uptake sources from depth. We use this to quantify the effects of soil-vegetation interactions on the inter-relationships between water fluxes, storage, and age. The novel modification of the SAS function framework is tested against empirical data from two contrasting soil-vegetation units in the Scottish Highlands; these are characterised by significant preferential flow, transporting younger water through the soil during high soil moisture conditions. Dominant young water fluxes, along with relatively low rainfall intensities, explain relatively stable soil water ages through time and with depth. Soil evaporation sources were more time-invariant with high preference for near-surface water, independent of soil moisture conditions, and resulting in soil evaporation water ages similar to near-surface soil waters (mean age: 50–65 days). Sources of root-water uptake were more variable: preferential near-surface water uptake occurred in wet conditions, with a deeper root-uptake source during dry soil conditions, which resulted in more variable water ages of transpiration (mean age: 56–79 days). The simple model structure provides a parsimonious means of constraining the water age of multiple fluxes from the upper part of the critical zone during time-varying conditions improving our understanding of vegetation influences on catchment scale water fluxes.
This preprint has been withdrawn.
-
Withdrawal notice
This preprint has been withdrawn.
-
Preprint
(2449 KB)
-
Supplement
(333 KB)
-
This preprint has been withdrawn.
- Preprint
(2449 KB) - Metadata XML
-
Supplement
(333 KB) - BibTeX
- EndNote
Interactive discussion
-
RC1: 'Referee Comment', Anonymous Referee #1, 31 Mar 2018
- AC3: 'Response to Reviewer 1', Aaron Smith, 04 Jun 2018
-
RC2: 'Comments', Anonymous Referee #2, 01 Apr 2018
- AC4: 'Response to Reviewer 2', Aaron Smith, 04 Jun 2018
- EC1: 'Start interacting', Nunzio Romano, 04 Apr 2018
-
AC1: 'Initial response to Reviewers 1 and 2', Aaron Smith, 12 Apr 2018
-
RC3: 'Reviewer 2', Anonymous Referee #2, 12 Apr 2018
- AC2: 'Response to Reviewer 2', Aaron Smith, 13 Apr 2018
-
RC3: 'Reviewer 2', Anonymous Referee #2, 12 Apr 2018
-
RC4: 'Interactive comment on “Using StorAge Selection functions to quantify ecohydrological controls on the time-variant age of evapotranspiration, soil water, and recharge” by Aaron A. Smith et al.', Anonymous Referee #3, 09 May 2018
- AC5: 'Response to Reviewer 3', Aaron Smith, 04 Jun 2018
Interactive discussion
-
RC1: 'Referee Comment', Anonymous Referee #1, 31 Mar 2018
- AC3: 'Response to Reviewer 1', Aaron Smith, 04 Jun 2018
-
RC2: 'Comments', Anonymous Referee #2, 01 Apr 2018
- AC4: 'Response to Reviewer 2', Aaron Smith, 04 Jun 2018
- EC1: 'Start interacting', Nunzio Romano, 04 Apr 2018
-
AC1: 'Initial response to Reviewers 1 and 2', Aaron Smith, 12 Apr 2018
-
RC3: 'Reviewer 2', Anonymous Referee #2, 12 Apr 2018
- AC2: 'Response to Reviewer 2', Aaron Smith, 13 Apr 2018
-
RC3: 'Reviewer 2', Anonymous Referee #2, 12 Apr 2018
-
RC4: 'Interactive comment on “Using StorAge Selection functions to quantify ecohydrological controls on the time-variant age of evapotranspiration, soil water, and recharge” by Aaron A. Smith et al.', Anonymous Referee #3, 09 May 2018
- AC5: 'Response to Reviewer 3', Aaron Smith, 04 Jun 2018
Viewed
HTML | XML | Total | Supplement | BibTeX | EndNote | |
---|---|---|---|---|---|---|
2,708 | 573 | 69 | 3,350 | 188 | 91 | 95 |
- HTML: 2,708
- PDF: 573
- XML: 69
- Total: 3,350
- Supplement: 188
- BibTeX: 91
- EndNote: 95
Viewed (geographical distribution)
Country | # | Views | % |
---|
Total: | 0 |
HTML: | 0 |
PDF: | 0 |
XML: | 0 |
- 1
Cited
4 citations as recorded by crossref.
- The effect of seasonal variation in precipitation and evapotranspiration on the transient travel time distributions M. Rahimpour Asenjan & M. Danesh-Yazdi 10.1016/j.advwatres.2020.103618
- The Stable Isotopic Composition of Different Water Bodies at the Soil–Plant–Atmosphere Continuum (SPAC) of the Western Loess Plateau, China C. Che et al. 10.3390/w11091742
- Water ages in the critical zone of long-term experimental sites in northern latitudes M. Sprenger et al. 10.5194/hess-22-3965-2018
- EcH<sub>2</sub>O-iso 1.0: water isotopes and age tracking in a process-based, distributed ecohydrological model S. Kuppel et al. 10.5194/gmd-11-3045-2018
Aaron A. Smith
Doerthe Tetzlaff
Chris Soulsby
This preprint has been withdrawn.
- Preprint
(2449 KB) - Metadata XML
-
Supplement
(333 KB) - BibTeX
- EndNote