Statistic was done for the precipitation and evaporation monitoring#N#                            data of Yuncheng from 1971 to 2007. The first-order seasonal#N#                            autoregressive models were set up, considering separately for the normal#N#                            and skewed distribution of rainfall and evaporation. Long series of#N#                            monthly precipitation and evaporation sequences were generated. Compared#N#                            the average, standard deviation and other parameters of simulation#N#                            sequences with measured sequence, the results of skewed simulation had#N#                            better agreement with the measured one. Then it proved that skewness#N#                            model maintains the main statistical characteristics of the measured#N#                            sequence. 20 groups of equal length with the measured sequence of#N#                            precipitation and evaporation sequence could be generated#N#                            through the skewness model. The sequence of irrigation water of the#N#                            winter wheat multiple corns planting type had been calculated, using the#N#                                “α” value#N#                            method. And comparative analysis with the#N#                            measured result was performed. The simulation computed#N#                            result was found in good coincidence with the measure computed#N#                            result.
['Nana Han', 'Yangren Wang']
Stochastic Simulation and Application of Monthly Rainfall and Evaporation