Supplementary Materials

Figure S1 Percentage bias in extreme flow indices (mean annual maximum flow and flood quantiles) estimated based on hydrological simulations using uncorrected precipitation and temperature data (“raw”) and bias corrected precipitation and temperature data (where the name of the bias correction method is given). The bias is estimated relative to indices estimated directly from observed discharge data with the use of a hydrological model.

Figure S2 Comparison of the percentage changes in the flood quantile Q10, representing a 10-year return period, for the two future periods and the two emission scenarios for the simulations based on uncorrected precipitation and temperature data (“raw”) and bias corrected precipitation and temperature data (where the name of the bias correction method is given). .

Table S1 Comparison of the percentage changes in flood quantile Q10 (10 year return period) for the emission scenario RCP8.5. Values in bold denote decreases of Q10.

CLIM1 / CLIM2
raw / QUANT / DGM / SGM / BSM / raw / QUANT / DGM / SGM / BSM
DUNAJEC / -0.40 / 14.36 / 9.18 / 1.86 / 6.18 / 23.79 / 54.36 / 42.50 / 16.56 / 19.96
BIALA TARNOWSKA / 18.21 / 42.07 / 33.16 / 24.34 / 31.49 / 58.73 / 107.18 / 106.16 / 37.28 / 49.32
WISŁA / 7.48 / 53.43 / 45.69 / 44.63 / 43.64 / 19.02 / 47.81 / 34.66 / 50.04 / 50.11
NYSA KŁODZKA / 11.59 / 44.30 / 40.32 / 61.80 / 51.27 / 3.87 / 96.13 / 79.78 / 131.29 / 96.73
OLEŚNICA / -2.92 / 19.34 / 11.95 / 31.18 / 48.94 / 3.34 / 79.75 / 56.24 / 81.77 / 101.26
ŁASICA / -3.17 / 0.08 / -5.48 / 3.13 / 5.10 / 41.16 / 39.35 / 19.34 / 16.59 / 10.62
NAREWKA / -27.32 / 12.47 / -4.48 / -5.86 / 2.28 / -22.19 / 101.66 / 80.64 / 46.56 / 50.91
FLINTA / 1.21 / -0.72 / 1.02 / -1.12 / -0.16 / 10.16 / 12.92 / 17.61 / 6.08 / 8.87
MYŚLA / -2.41 / 45.61 / 10.04 / 36.26 / 48.30 / 32.91 / 107.23 / 99.89 / 80.90 / 108.83
GUBER / -26.89 / -2.74 / -1.88 / 25.87 / 49.16 / -41.45 / 78.98 / 53.39 / 73.91 / 94.74

Table S2 A comparison of the relative changes in flood quantile Q100 (100 year return period) for the emission scenario RCP8.5. Values in bold denote decreases of Q100.

CLIM1 / CLIM2
raw / QUANT / DGM / SGM / BSM / raw / QUANT / DGM / SGM / BSM
DUNAJEC / -4.20 / 5.14 / 5.02 / 6.10 / 14.16 / 28.70 / 50.55 / 42.19 / 23.66 / 31.73
BIALA TARNOWSKA / 33.28 / 39.80 / 43.17 / 52.89 / 51.59 / 72.19 / 100.06 / 107.86 / 64.24 / 84.57
WISŁA / 15.59 / 56.28 / 46.85 / 48.33 / 47.97 / 27.13 / 44.51 / 29.92 / 44.06 / 44.60
NYSA KŁODZKA / 11.94 / 64.77 / 52.43 / 95.44 / 80.18 / 7.98 / 118.07 / 100.51 / 212.33 / 148.65
OLEŚNICA / 0.61 / 24.20 / -0.08 / 53.21 / 53.45 / -0.80 / 63.12 / 40.27 / 87.11 / 112.83
ŁASICA / -5.12 / -2.89 / -7.73 / 0.97 / 0.54 / 38.89 / 40.15 / 17.75 / 21.28 / 9.32
NAREWKA / -28.47 / 19.28 / -5.80 / -9.18 / -0.50 / -21.75 / 107.86 / 96.87 / 51.45 / 52.46
FLINTA / 1.65 / -3.20 / -0.04 / -3.78 / -6.79 / 7.10 / -9.56 / 4.21 / -7.94 / -12.13
MYŚLA / -3.40 / 38.89 / 11.64 / 44.34 / 49.68 / 31.62 / 95.56 / 98.31 / 87.34 / 104.88
GUBER / -32.14 / -5.16 / -9.36 / 32.92 / 54.67 / -47.44 / 72.32 / 49.30 / 79.19 / 102.89

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