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应用流体力学方法,计算了我国东南部地区1977—1979年内褐飞虱20个迁入峰日三个不同高度层(500米、1000米和1500米)的垂直气流速度分布,并结合夜间降雨分布,分析它们同褐飞虱降落的关系,得出下列特点: 北迁的锋面天气型,大部分降虫区位于降雨区。副热带高压脊天气型,大部分降虫区无降雨,而其中大部分位于下沉气流区。南迁的大陆冷高压天气型,绝大部分降虫区都无降雨,而其中大部分位于下沉气流区,这一特点,较之副热带高压脊天气型更为显著。另作了降虫和垂直气流、降雨关系的概率统计。
Using the fluid mechanics method, the vertical airflow velocity distributions of 20 brown planthoppers migrating to three different heights (500 meters, 1000 meters and 1,500 meters) during the period of 1977 to 1979 in the southeastern part of China were calculated. Based on the analysis of the distribution of night-rains, The relationship between them and the Nilaparvata lugens landed has the following features: The frontal migratory frontal weather pattern, most of the dead insect zones are located in the rainfall area. Subtropical high ridge weather, most of the dropworm area without rainfall, most of which are located in the downdraft area. The south cold continent cold high pressure weather type, the vast majority of dead insects area without rainfall, most of which located in the downdraft area, this feature, compared with the subtropical ridge ridge weather is more significant. The other for the worm and vertical airflow, the probability of rainfall statistics.