Table 5. Period and periodic intensity of average temperature, accumulated precipitation and runoff in the seasonal level for the Qira River basin.
| Index | SP-AT | SU-AT | AU-AT | WI-AT |
| P | 5*;11;18 | 3*;10;17 | 4*;17;22 | 5*;12;22 |
| SPF | 1977–1983 1996–2006 | 1970–1999 | 1970–1975 1992–1995 | 1970–1982 2005–2010 |
| Index | SP-AP | SU-AP | AU-AP | WI-AP |
| P | 4*;8*;10;15 | 4*;7*;10;15 | 4*;8*;13;18 | 3*;14;18 |
| SPF | 1982–1996 2002–2010 | 1977–2010 | 1981–1996 | 1976–1980 1998–2010 |
| Index | SP-AR | SU-AR | AU-AR | WI-AR |
| P | 3*;8*;16 | 3*;14;22 | 3*;8*;12 | 8*;15 |
| SPF | 1961–1991 | 1977–1988 2000–2010 | 1977–1988 2003–2010 | 1987–1988 |
Notes.
P stands for period, SPF denotes significant periodic fluctuation.
signifies that period is significant at the 0.05 level.