溪洛渡水电站2次暴雨过程对比分析

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作者简介 赵军学（1994—），男，云南昭通人，助理工程师，主要从事县级综合防灾减灾气象业务工作。

收稿日期 2023-05-21

Comparative Analysis of Two Rainstorm Processes at Xiluodu Hydropower Station

Zhao Jun-xue et al（Yanjin Meteorological Bureau， Yanjin， Yunnan 657500）

Abstract Based on the data of MICAPS conventional， automatic and radiosonde stations， the two rainstorm weather processes of the Xiluodu Hydropower Station on the Jinsha River on August 8， 2020 and September 4， 2021 are analyzed from the aspects of weather characteristics， circulation background， physical quantity characteristics， etc. The results showed that 500 hPa before the occurrence of the two rainstorm， the middle and high latitudes in East Asia were in the situation of two troughs and one ridge， both of which were convergence type， and were affected by vortex shear; Before the process， there was instability in atmospheric stratification with high energy but not released. The temperature in the dam area was above 32 ℃， and the CAPE value was high. The K index reached above 42， and the SI index was less than -2.5. But the “8·08” convergence system was more obvious， with strong convection and thunderstorms， strong locality， strong short-term rainfall， and long duration， while the “9·04” vortex was more obvious， with strong regional rainfall and short duration.

Key words Xiluodu; Rainstorm; Low vortices; Local strong convection

摘要 利用MICAPS常規、自动站、探空站等资料，从天气特点、环流背景、物理量特征等方面对金沙江溪洛渡水电站2020年8月8日和2021年9月4日2次暴雨天气过程进行分析。（剩余4803字）

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