Journal cover Journal topic
Hydrology and Earth System Sciences An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 4.936 IF 4.936
  • IF 5-year value: 5.615 IF 5-year
    5.615
  • CiteScore value: 4.94 CiteScore
    4.94
  • SNIP value: 1.612 SNIP 1.612
  • IPP value: 4.70 IPP 4.70
  • SJR value: 2.134 SJR 2.134
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 107 Scimago H
    index 107
  • h5-index value: 63 h5-index 63
Discussion papers
https://doi.org/10.5194/hess-2019-276
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-2019-276
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 16 Jul 2019

Submitted as: research article | 16 Jul 2019

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Hydrology and Earth System Sciences (HESS).

Characterization of event water fractions and transit times under typhoon rainstorms in fractured mountainous catchments: Implications for time-variant parameterization

Jun-Yi Lee1, Yu-Ting Shih1, Chiao-Ying Lan1, Tsung-Yu Lee2, Tsung-Ren Peng3, Cheing-Tung Lee1, and Jr-Chuan Huang1 Jun-Yi Lee et al.
  • 1Department of Geography, National Taiwan University, Taipei City, 10617, Taiwan
  • 2Department of Geography, National Taiwan Normal University, Taipei City, Taiwan
  • 3Department of Soil and Environmental Sciences, National Chung Hsing University, Taichung City, Taiwan

Abstract. Transit time with its indicative significance in regulating rainfall-runoff mechanism is a key factor for understanding many biogeochemical processes, but is rarely investigated in steep and fractured mountainous catchments. Mountainous catchments in Taiwan are characterized by active endogenic tectonics and exogenic typhoons and thus provide opportunities to explore the hydrodynamic systems over time. In this study, the hydrometrics and δ18O in rain and stream water were sampled by ~ 3-hour interval for six typhoon events in two mesoscale catchments. The TRANSEP (transfer function hydrograph separation model) and global sensitivity analysis was applied for estimating mean transit time (MTTew) and fraction (Few) of event water and identifying the chronosequent parameter sensitivity. Results show that TRANSEP could satisfactorily simulate the streamflow and δ18O change with the efficiency coefficients of from 0.85 to 0.97 and from 0.61 to 0.99, respectively. The MTTew and Few varied from 2 to 11 h and from 0.2 to 0.8, respectively. Our MTTew in the meso-scale catchments is similar with that in micro-scale catchments, showing a fast transfer in our steep catchments. The mean rainfall intensity which negatively controls on the MTTew and positively on the Few is a predominant indicator which likely activates preferential flow paths and quickly transfers event water to the stream. Sensitivity analysis among inter- and intra-events suggested that parameter sensitivity is event-depend and time-variant, affirming a nonlinear behavior in event water transfer function and time-variant parameterization should be particularly considered when estimating the MTTew in steep and fractured catchments.

Jun-Yi Lee et al.
Interactive discussion
Status: open (until 10 Sep 2019)
Status: open (until 10 Sep 2019)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
[Subscribe to comment alert] Printer-friendly Version - Printer-friendly version Supplement - Supplement
Jun-Yi Lee et al.
Viewed  
Total article views: 178 (including HTML, PDF, and XML)
HTML PDF XML Total Supplement BibTeX EndNote
126 48 4 178 12 3 5
  • HTML: 126
  • PDF: 48
  • XML: 4
  • Total: 178
  • Supplement: 12
  • BibTeX: 3
  • EndNote: 5
Views and downloads (calculated since 16 Jul 2019)
Cumulative views and downloads (calculated since 16 Jul 2019)
Viewed (geographical distribution)  
Total article views: 136 (including HTML, PDF, and XML) Thereof 134 with geography defined and 2 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Cited  
Saved  
No saved metrics found.
Discussed  
No discussed metrics found.
Latest update: 24 Aug 2019
Publications Copernicus
Download
Short summary
Scientists concern the travel time and the fraction of new water from the sky to the stream to figure out the sources of freshwater and the distribution of contaminants. This study tells a story of water by analyzing the oxygen isotope of rain and stream water. In our sites, a raindrop only needs 2–11 hour to travel to the stream and large storm could exert more and younger new water. The rapid response is likely because of the steep landscape which helps transferring new water to the stream.
Scientists concern the travel time and the fraction of new water from the sky to the stream to...
Citation