Articles | Volume 26, issue 24
Research article
20 Dec 2022
Research article |  | 20 Dec 2022

Does non-stationarity induced by multiyear drought invalidate the paired-catchment method?

Yunfan Zhang, Lei Cheng, Lu Zhang, Shujing Qin, Liu Liu, Pan Liu, and Yanghe Liu

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Cited articles

Allen, P. M., Harmel, R. D., Dunbar, J. A., and Arnold, J. G.: Upland contribution of sediment and runoff during extreme drought: A study of the 1947–1956 drought in the Blackland Prairie, Texas, J. Hydrol., 407, 1–11,, 2011. 
Avanzi, F., Rungee, J., Maurer, T., Bales, R., Ma, Q., Glaser, S., and Conklin, M.: Climate elasticity of evapotranspiration shifts the water balance of Mediterranean climates during multi-year droughts, Hydrol. Earth Syst. Sci., 24, 4317–4337,, 2020. 
Bosch, J. M. and Hewlett, J. D.: A review of catchment experiments to determine the effect of vegetation changes on water yield and evapotranspiration, J. Hydrol., 55, 3–23,, 1982. 
Bren, L., Lane, P., and McGuire, D.: An empirical, comparative model of changes in annual water yield associated with pine plantations in southern Australia, Aust. Forest., 69, 275–284,, 2006. 
Bren, L. J. and Lane, P. N. J.: Optimal development of calibration equations for paired catchment projects, J. Hydrol., 519, 720–731,, 2014. 
Short summary
Multiyear drought has been demonstrated to cause non-stationary rainfall–runoff relationship. But whether changes can invalidate the most fundamental method (i.e., paired-catchment method (PCM)) for separating vegetation change impacts is still unknown. Using paired-catchment data with 10-year drought, PCM is shown to still be reliable even in catchments with non-stationarity. A new framework is further proposed to separate impacts of two non-stationary drivers, using paired-catchment data.