Preprints
https://doi.org/10.5194/hessd-11-11183-2014
https://doi.org/10.5194/hessd-11-11183-2014
09 Oct 2014
 | 09 Oct 2014
Status: this preprint was under review for the journal HESS but the revision was not accepted.

Do changes in climate or vegetation regulate evapotranspiration and streamflow trends in water-limited basins?

Q. Liu, Z. Yang, L. Liang, and W. Nan

Abstract. Interactions between climate change, vegetation, and soil regulate hydrological processes. In this study, it was assumed that vegetation type and extent remained fixed and unchanged throughout the study period, while the effective rooting depth (Ze) changed under climate change scenarios. Budyko's hydrological model was used to explore the impact of climate change and vegetation on evapotranspiration (E) and streamflow (Q) on the static vegetation rooting depth and the dynamic vegetation rooting depth. Results showed that both precipitation (P) and potential evapotranspiration (Ep) exhibited negative trends, which resulted in decreasing trends for dynamic Ze scenarios. Combined with climatic change, decreasing trends in Ze altered the partitioning of P into E and Q. For dynamic scenarios, total E and Q were predicted to be −1.73 and 28.22%, respectively, greater than static scenarios. Although climate change regulated changes in E and Q, the response of Ze to climate change had a greater overall contribution to changes in hydrological processes. Results from this study suggest that with the exception of vegetation type and extent, Ze scenarios were able to alter water balances, which in itself should help to regulate climate change impacts on water resources.

Q. Liu, Z. Yang, L. Liang, and W. Nan
 
Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement
 
Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement
Q. Liu, Z. Yang, L. Liang, and W. Nan
Q. Liu, Z. Yang, L. Liang, and W. Nan

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