Page - 256 - in Book of Full Papers - Symposium Hydro Engineering

Fig. 4 Precipitation sums at Harztor-Ilfeld-Hufhaus 2,4 km Northwest of Neustadt dam. Data source: DWD Table 1 Monthly and seasonal precipitation amounts at gauging stations Harztor-Ilfeld- Hufhaus (3 gap years, GY), Südharz-Hayn (1 GY) and Oberharz-Sorge (3 GY). Data source: DWD winter seasonal trend: y = 0.60x + 386.83 R² = 0.03 summer seasonal trend: y = -0.21x + 435.49 R² = 0.00 0 200 400 600 800 1000 1200 0 200 400 600 800 1000 1200 winter: November -April summer: May -October Station Harztor-Hufhaus Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Wi Su Year Mean 1916-2016 [mm] 74 84 82 61 61 57 65 71 80 76 63 68 419 424 843 Trend 1916-2016 [mm a -1 ] 0.2 0.2 0.0 0.0 0.3 -0.1 0.1 0.0 0.0 -0.2 0.1 -0.2 0.4 -0.2 0.1 Breakpoint in year 1938 1976 1980 1934 1938 1986 1949 1993 1957 1970 1983 1942 1979 1958 1991 Mean 1988-2016 [mm] 83 93 82 66 72 48.4 67 64 84 66 73 67 447 420 867 Change from 1988 [%] 17 16 1 13 28 -19 4 -15 6 -17 22 -2 9.7 -1 4 Mean 1961-1987 [mm] 74 84 75 56 65 64.3 71 79 63 70 56 56 420 394 814 Change from 1988 [%] 13 11 10 17 12 -25 -5 -19 33 -6 30 21 6 7 6 Trend 1988-2016 [mm a -1 ] -0.3 -1.1 1.2 -1.5 -1.8 0.19 2.5 -0.4 1.2 0.8 -0.1 0.8 -2.6 3.8 -0.2 Station Südharz-Hayn Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Wi Su Year Mean 1916-2016 [mm] 61 69 66 53 51 52 59 66 70 69 53 56 352 372 725 Trend 1916-2016 [mm a -1 ] 0.1 0.2 0.1 0.1 0.3 -0.2 0.2 0.0 0.0 0.0 0.2 -0.1 0.4 0.0 0.4 Breakpoint in year 1938 1953 1980 1932 1954 1973 1947 1991 1963 1970 1992 1942 1936 1974 1991 Mean 1988-2016 [mm] 66 76 69 58 61 44 63 57 72 62 64 55 373 371 747 Change from 1988 [%] 9.7 16 4.98 14 29 -19.9 9 -18 3 -13 33 -2 9 -1 4 Mean 1961-1987 [mm] 63 70 59 48 56 58 63 77 59 63 45 46 359 353 712 Change from 1988 [%] 4 8 16 22 8 -24 0 -26 22 -1 43 19 4 5 4.9 Trend 1988-2016 [mm a -1 ] -0.3 -0.3 1.0 -1.0 -1.1 0.0 1.8 -0.1 0.9 0.0 0.8 0.4 -1.0 3.6 2.7 Station Oberharz-Sorge Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Wi Su Year Mean 1918-2016 [mm] 95 103 104 79 75 66 70 75 86 77 69 78 524 455 980 Trend 1918-2016 [mm a -1 ] 0.2 0.5 0.3 0.2 0.5 -0.2 0.2 0.1 0.0 -0.1 0.1 0.0 1.5 0.0 1.5 Breakpoint in year 1962 1953 1980 1987 1965 1986 1992 1950 1967 1970 1992 1942 1979 1992 1991 Mean 1988-2016 [mm] 101 122 120 95 96 56.9 76 67 88 76 75 84 591 466 1057 Change from 1988 [%] 9 28 23 32 47 -19 12 -14 3 -2 14 12 19.6 4 12 Mean 1961-1987 [mm] 102 105 90 65 78 69 71 92 69 69 62 70 510 433 943 Change from 1988 [%] -1 16 33 46 23 -18 7 -27 27 9.8 21 21 16 8 12 Trend 1988-2016 [mm a -1 ] 0.6 0.0 2.0 -0.4 -1.7 0.5 2.1 0.0 1.1 0.5 0.5 0.3 2.0 3.3 5.8 Level of significance of trends and breakpoints: p > 0,1 (standard); p < 0,1 (italic) ; p < 0,05 (bold); p < 0,01 (bold italic) Color code of changes [%] from 1988: <-30 >-30 >-20 >-10 >-5 >5 >10 >20 >30 256