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Figure 1. Number of streamgages, out of a total of 395, with
statistically significant (p<0.05) trends for the 50-year
period 1944-1993. |

Years of Record | ||||||
---|---|---|---|---|---|---|

30 | 40 | 50 | 60 | 70 | 80 | |

Beginning year Ending year Stations tested |
1993 395 |
1993 395 |
1993 395 |
1993 193 |
1993 70 |
1993 34 |

Annual minimum (daily mean) discharge | ||||||

No. of significant trends (p<0.05)Percent with significant trends No. with increasing trend No. with decreasing trend |
28 74 38 |
45 145 32 |
41 127 36 |
44 76 9 |
49 32 2 |
38 10 3 |

Annual 10 ^{th} percentile of
daily discharge | ||||||

No. of significant trends (p<0.05)Percent with significant trends No. with increasing trend No. with decreasing trend |
26 63 38 |
39 132 23 |
36 117 26 |
46 80 9 |
46 30 2 |
35 8 4 |

Annual 30 ^{th} percentile of
daily discharge | ||||||

No. of significant trends (p<0.05)Percent with significant trends No. with increasing trend No. with decreasing trend |
28 76 33 |
41 148 12 |
34 125 10 |
42 79 2 |
40 27 1 |
26 8 1 |

Annual 50 ^{th} percentile of
daily discharge | ||||||

No. of significant trends (p<0.05)Percent with significant trends No. with increasing trend No. with decreasing trend |
25 76 22 |
44 167 7 |
29 113 3 |
42 81 1 |
39 26 1 |
29 9 1 |

Annual 70 ^{th} percentile of
daily discharge | ||||||

No. of significant trends (p<0.05)Percent with significant trends No. with increasing trend No. with decreasing trend |
15 55 4 |
33 124 6 |
16 61 3 |
30 58 0 |
27 19 0 |
18 6 0 |

Annual 90 ^{th} percentile of
daily discharge | ||||||

No. of significant trends (p<0.05)Percent with significant trends No. with increasing trend No. with decreasing trend |
11 18 25 |
24 76 18 |
10 23 17 |
10 19 1 |
14 10 0 |
15 5 0 |

Annual maximum (daily mean) discharge | ||||||

No. of significant trends (p<0.05)Percent with significant trends No. with increasing trend No. with decreasing trend |
9 12 25 |
13 31 22 |
9 14 21 |
10 11 9 |
13 5 4 |
12 2 2 |

Revised: December 2, 1998

Accepted: December 3, 1998

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