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1·Robust estimation has been applied in flood frequency analysis.

近年来，稳健估计在洪水频率分析中的应用已被提出。

2·Flood frequency (return period) is referring to recurrence probability of flood in certain period.

洪水频率(或重现期)是指一定时期内某种洪水出现的机率。

3·Regional flood frequency analysis is the effective method for flood frequency analysis in data-lacked or non-data area.

区域洪水频率分析是解决资料缺乏地区洪水频率计算的一种方法。

4·A new method of least square is raised in curve fitting of flood frequency calculating and its specific properties are analysed.

提出了在洪水频率计算时适线法中最小二乘方的一种新的求解方法，并对其特性进行分析。

5·Considering the combined action of peak flood and flood volume, flood frequency use analysis by synthesis method in computer software.

考虑洪峰流量、洪水总量对洪水频率的共同决定作用，计算机软件中洪水资料频率的判断，采用综合分析法。

6·According to the traditional flood frequency analysis, flood data are assumed to have been taken from a known distribution function as a whole.

传统的洪水频率分析都是假定洪水资料取自某一已知分布函数的总体。

7·Regional flood frequency analysis is a useful approach method that avoids the shortness of at-site sample series and estimates design flood for un-gauged area.

区域频率分析能充分利用相似流域组的资料来扩充信息量，克服单站样本系列资料短缺的局限，解决无资料地区设计洪水的估算问题。

8·The riparian vegetation in the subtropical zone develops well and the evolution of vegetation community depends mainly on the flood frequency and flooding elevation.

亚热带地域河边植被发育较快，植被演替主要决定于淹没频率与高程。

9·A nonparametric kernel estimation of the flood frequency with historic information is presented in this paper. The limitation in assuming a distribution type is overcome.

本文提出了在有历史洪水情况下洪水频率的非参数核估计方法，克服了现行方法假定分布型式的局限。

10·Regional flood frequency analysis for un-gauged basins included selecting a pooling-group, estimating the index flood, deriving pooled growth curve and fitting flood frequency curve for tested basin.

无资料地区设计洪水的区域频率分析包括选择相似流域组、估计指标洪水以及推求区域综合增长曲线和设计流域的洪水频率曲线。