【摘要】 地质灾害预警系统中需要准确的研究区预报降雨栅格数据及生成方法,开发程序,借助于全区高程点进行子网格内高程点分层次随机抽稀,设置抽稀网格的大小及抽稀的比例,抽稀后的结果可进行人工补充剩余特征高程点;再根据已有监测站监测值,初步设定高程与降雨的关系,赋值降雨量,计算累加降雨,进行IDW插值生成预报降雨的栅格,根据不同的设置,将生成的预报降雨栅格与易发分区及历史灾害区域进行对比,判别最佳抽稀比例设置以生成最符合要求的预报降雨栅格。特点是程序快速抽稀,可控制度高,以少量更准确全面的点位获取更适用于研究区的降雨栅格,提高降雨预报的准确性,优化存取及处理效率,为降雨预报插值分析等应用提供一定的技术参考。更多还原

【Abstract】 The geological hazard warning system needs more accurate forecast rainfall and grid generation methods of study area,and develop process.With the help of the elevation points in the whole area,the hierarchical random sampling of the elevation points in the sub grid is carried out.We can set the size of the grid and the proportion of pumping.The results of sparsing can be used to artificial supplement the characteristic elevation points,according to the existing monitor data of of monitor stations,handle preliminary setting of relations between height and rainfall,assigned rainfall and calculate cumulative rainfall,and then use IDW interpolation to get rainfall forecast,according to the different settings,comparing the generated rainfall forecast grid with prone area and historical disaster area,determine the best proportion of dilution to get the most appropriate grid.Characteristics is the rapid extraction of the program,The control system is high,with a little more accurate and comprehensive point of view to obtain more suitable for the study area’s rainfall grid,improve the accuracy of rainfall forecast,optimize access and processing efficiency.It provides some technical reference for the application of rainfall forecast interpolation analysis.更多还原