| 内蒙古5—9月小时强降水时空变化特征 |
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| 引用本文： | 常煜, 冀刚, 高绍鑫, 刘静. 2023: 引发内蒙古汛期暴雨洪涝灾害的降水事件雨强特征分析. 暴雨灾害, 42(3): 346-352. DOI: 10.12406/byzh.2021-224 |
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| 作者姓名： | 常煜 冀刚 高绍鑫 刘静 |
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| 作者单位： | 1.内蒙古自治区呼伦贝尔市气象局，呼伦贝尔 021008;2.内蒙古自治区锡林郭勒盟气象局，锡林郭勒，012600 |
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| 摘 要： | 选取2017—2018年汛期(6—8月)内蒙古108例引发暴雨洪涝灾害的降水事件，对其雨强持续性、最大值、日变化等特征进行分析，通过双重e指数函数和百分位相结合方法，确定降水事件阈值。结果表明：(1) 降水事件高发区在大兴安岭东部，最高可达5~6次，持续时间最长为10d，降水事件次高发区在阴山山脉以南；(2)降水事件雨强最大值和最小值均出现在东部地区，极差最大值达70.4mm·h-1，西部和中部地区雨强最大值较接近，中部地区雨强极差最小，为16.0mm·h-1，但降水事件平均雨强最大值出现在西部地区，最小值出现在中部地区；(3)降水事件雨强日变化特征具有地域性差异，西部地区雨强(平均雨强)最大值出现时间具有分散不集中且差异较大的特点，易出现在凌晨、早晨、中午和傍晚，中部和东部地区易出现在中午和下午；(4)西部、中部和东部地区降水事件阈值分别为13.8mm·h-1、10.0mm·h-1和14.2 mm·h-1。
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| 关 键 词： | 降水事件 洪涝灾害 雨强特征 双重e指数函数 百分位方法 |
| 收稿时间： | 2021-11-26 |
Spatial-temporal variations of hourly strong precipitation from May to September in Inner Mongolia of China |
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| CHANG Yu, JI Gang, GAO Shaoxin, LIU Jing. 2023: Analysis of rainfall intensity characteristics of precipitation events causing rainstorm and flood disaster in flood season in Inner Mongolia. Torrential Rain and Disasters, 42(3): 346-352. DOI: 10.12406/byzh.2021-224 |
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| Authors: | CHANG Yu JI Gang GAO Shaoxin LIU Jing |
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| Affiliation: | 1.Inner MongoliaHulun Buir Meteorological Bureau, Hulun Buir 021008;2.Inner Mongolia Xilin Gol League Meteorological Bureau, Xilin Gol League 012600 |
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| Abstract: | Based on 108 precipitation events caused by heavy rain and flood disaster (DPE) from 2017 to 2018 during flood season (from June to August)in Inner Mongolia, the characteristics about duration, maximum value and diurnal variation of the precipitation intensity were analyzed, and DPE threshold was determined by double e-exponential function and percentage method. The results show that: (1) There is an area with high incidence of DPE in the east of the Greater Khingan Mountains. It can occur up to five or six times, and the longest duration is close to 10 days. The second highest incidence area of DPE occurs in the south of Yinshan Mountain.(2) The maximum and minimum value of precipitation intensity of DPE appear in eastern regions and the maximum range reaching 70.4 mm·h-1. The maximum value of precipitation intensity in the western and central regions is close, while the minimum range of precipitation intensity in the central region is 16.0 mm·h-1. While the maximum value of average precipitation intensity of DPE happen in western regions, the minimum value is in the central regions.(3) The diurnal variation characteristics of precipitation intensity of DPE have regional differences. Especially, the characteristics of the occurrence time about the maximum value of precipitation intensity (average precipitation intensity) are dispersion, non-concentration and great difference in the western regions. It tends to appear in the early morning, morning, noon and evening. But in other regions it tends to occur at noon and afternoon; (4) The thresholds of DPE in western, central and eastern regions are 13.8mm·h-1, 10.0mm·h-1 and 14.2mm·h-1, respectively. |
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| Keywords: | precipitation events flood disaster precipitation intensity characteristics doublee- exponential function percentile method |
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