South Africa raised the flood-warning level for its central Orange River area today as water levels in places were expected to reach the highest since 1996.
南非提高了洪水警报级别，奥兰治河水位已经达到了自1996年已来的最高位。
2
The river rose to its highestlevel in history during the flood last year.
这条河在去年洪灾期间上涨到历史最高水位。
3
Then, the distribution parameters of the probability model are amended using the small sample of the measured highestflood water level of last 10 years.