It is important for predictions of heavy rainfall to include radar data to provide better reflection of moisture. Numerical experiments were carried out with real cases of heavy rains in the Changjiang (Yangtze)-Huaih...It is important for predictions of heavy rainfall to include radar data to provide better reflection of moisture. Numerical experiments were carried out with real cases of heavy rains in the Changjiang (Yangtze)-Huaihe River Basin using a PSU/NCAR mesoscale model that incorporated radar data. Processed radar data were added to the model to change the analysis of initial humidity field before 24-h numerical simulations were made and the results compared with a control experiment. It is suggested that the radar-data-incorporated numerical predictions could produce locations of precipitation areas and maximum rainfall that are closer to reality than the control, due to the fact that moisture and converging updraft are strengthened in the middle and lower levels of the troposphere in the area of heavy rains and areas nearby. The work is expected to improve numerical modeling and forecasts of heavy rains in middle and lower latitudes of China.展开更多
To the issue of surface subsidence because of mining, the range of surface subsidence is simulated and the law of falling and deformation is obtained by the discrete element method. The numerical simulating method can...To the issue of surface subsidence because of mining, the range of surface subsidence is simulated and the law of falling and deformation is obtained by the discrete element method. The numerical simulating method can predict angle of displacement and deformation in light of displacement value, meanwhile the results of simulation also provide scientific reference for estimating falling angle and determining the range of surface subsidence.展开更多
基金A project of the Natural Science Foundation of China (49794030)
文摘It is important for predictions of heavy rainfall to include radar data to provide better reflection of moisture. Numerical experiments were carried out with real cases of heavy rains in the Changjiang (Yangtze)-Huaihe River Basin using a PSU/NCAR mesoscale model that incorporated radar data. Processed radar data were added to the model to change the analysis of initial humidity field before 24-h numerical simulations were made and the results compared with a control experiment. It is suggested that the radar-data-incorporated numerical predictions could produce locations of precipitation areas and maximum rainfall that are closer to reality than the control, due to the fact that moisture and converging updraft are strengthened in the middle and lower levels of the troposphere in the area of heavy rains and areas nearby. The work is expected to improve numerical modeling and forecasts of heavy rains in middle and lower latitudes of China.
基金Project (2002215) supported by Natural Science Foundation of Liaoning Province , China Project (202183392) supported by ResearchFoundation of Education Bureau of Liaoning Province , China
文摘To the issue of surface subsidence because of mining, the range of surface subsidence is simulated and the law of falling and deformation is obtained by the discrete element method. The numerical simulating method can predict angle of displacement and deformation in light of displacement value, meanwhile the results of simulation also provide scientific reference for estimating falling angle and determining the range of surface subsidence.
