主题:【讨论】哪位大侠就三峡问题来个科普系列吧 -- 斯人
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比如Wiki上对百年一遇的洪水的解释
A one-hundred-year flood is calculated to be the level of flood water expected to be equaled or exceeded every 100 years on average. The 100-year flood is more accurately referred to as the 1% annual exceedance probability flood, since it is a flood that has a 1% chance of being equaled or exceeded in any single year.[1] Similarly, a flood level expected to be equaled or exceeded every 10 years on average is known as a ten-year flood. Based on the expected flood water level, a predicted area of inundation can be mapped out. This floodplain map figures very importantly in building permits, environmental regulations, and flood insurance.
这个词条还没有中文版的。
- 相关回复 上下关系8
🙂如果都这么实在的宣传多好,偏偏搞什么N年一遇的噱头 meokey 字95 2010-07-30 06:14:37
🙂[ZT]松鼠:“N年一遇”为何年年遇? meokey 字3068 2010-08-05 09:02:08
🙂说不定不是噱头,而是行规? 王灏 字101 2010-08-03 20:58:51
🙂这个不是噱头,国外也这么说的
🙂可是国外也在适时调整这个标准 1 meokey 字604 2010-08-02 11:18:15
🙂几十年内就发生了十几次百年一遇是正常的。因为中国有几十条 1 友来有趣 字194 2010-08-02 11:45:12
🙂同意 PBS 字164 2010-10-06 22:23:25
🙂你这命题作文要求还真高。我来抛块砖头 88 达雅 字4107 2010-07-28 22:39:05