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Yearly natural streamflow data of five hydrologic stations over the upper of Weihe basin for 1945–2000 were utilized to analyze the drought characteristics by using Run-theory and Grey system. Based on the theory of run and intercept method, the hydrologic drought duration, drought severity and the value of conditional probability were calculated to evaluate the regional hydrological drought characteristics...
In order to accurately analyze the trend of health state variation of aero-generator, a grey prediction model based on genetic algorithm is presented in this paper. Then use the original grey model and the optimized grey model respectively to carry out health state trend analysis of the aero-generator. On this basis, the two models were used to study aero-generator health trends, and compared with...
Precipitation, being an important input parameter in traditional hrdrological models, may leds to great uncertainties in models. Inhomogeneity of distribution of precipitation in time-space as well as defects of means and technologies of precipitation measurement restrict the application of distributed models in hydrological simulation and forecasting. With the development of technology of radar precipitation...
Soil water plays an important role in the “Four Water” transformation, which is also the direct water source to promote the growth of crop. However, soil water has been ignored for long time due to that it is difficult to observe and monitor. As a consequence, there is limited soil water observation data available for statistical analysis and modeling. This paper, after collecting and analyzing the...
A web-based system served as real-time rainfall-runoff forecast is developed by adopting Browse Server (B/S) structures and the oriented object program, which is capable of forecasting runoff generation, predicting rainfall, evaporation, calculating subsurface runoff and analyzing water balance. The system has been successfully applied in the hydrology forecast practices of General Station of Hydrology,...
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