水文频率分析（Hydrologic frequency analysis）.docVIP

水文频率分析（Hydrologic frequency analysis） Hydrologic frequency analysis medical aircraft Hydrologic frequency analysis according to some statistical characteristics of the hydrologic frequency analysis of hydrological frequency analysis, using the existing hydrological data analysis, hydrological variables design value and frequency (return period) the quantitative relationship between the. Catalog brief introduction Hydrological factors Sample series Empirical frequency Recurrence period Statistical parameter Frequency curve Plotting method of frequency curve A brief introduction to the reasonableness of the results Hydrological factors Sample series Empirical frequency Recurrence period Statistical parameter Frequency curve Plotting method of frequency curve The results are reviewed and edited According to the occurrence of natural phenomena can be divided into: the inevitable event that under certain conditions will inevitably happen, such as rainfall will be rising is inevitable; that in the unlikely event, under the condition to realize that will never happen, if only in the gravity of water flow is low to high impossible; random events (also known as the accident), which may take place under certain conditions may not occur as each river every year an annual maximum flow is inevitable, but this is the maximum possible value may be that value, it appears in the number is a random event. In frequency calculation, the possibility of occurrence of an inevitable event (i.e., one hundred percent) is represented by 1, and the possibility of occurrence of an impossible event is represented by 0. The probability of a random event is between 0 and 1. Edit this section of hydrological factors As the amount of rainfall and runoff in appearance has the characteristics of randomness, such as variable rainfall, annual peak flow and minimum flow in dry season are random events, are available to calculate the frequency analysis method. Hydrological frequency analysis mainly includ