2016年多轮强降雨影响下黄冈市地质灾害发育规律浅析

Development of Geological Disasters in Huanggang under the Influence of Heavy Rainfall in 2016

黄冈市地处大别山南麓,属于低山丘陵地区,地质灾害点多面广,发生频率高,但规模小、分布相对密集。2016年黄冈市梅雨期共遭遇了六轮强降雨天气,在为期33 d的梅雨期中,31 d有降雨,持续性降雨覆盖全市,降水量远超历史同期。尤其"6·19"以来,受几轮持续性强降雨影响,黄冈市发生了近400起地质灾害。以2016年黄冈市发生的地质灾害数量、历年及2016年降雨量为基础统计数据,分析地质灾害发育分布特征,重点评价滑坡基于地理位置、岩性、坡脚、坡高、前缘高程等因素的发育规律,通过引入简单相关系数,计算得出2016年黄冈市滑坡数量与降雨量的相关性。通过分析得出的结论,可为今后黄冈市的地质灾害防治工作提供地质依据。

Huanggang is located in the south of Dabie Mountain,which belongs to the hilly region of the lower mountains.The geological disasters are more and more numerous,and the frequency is high,but the scale is small and the distribution is relatively dense.In2016,the meiyu period of Huanggang encountered six rounds of heavy rainfall.During the33days of the plum rain,31days of rain,continuous rainfall covered the whole city,the precipitation was far from historical.Especially since“6·19”has been affected by several rounds of continuous heavy rainfall,there have been nearly400geological disasters in Huanggang.Based on the number of geological disasters in Huanggang in2016,the statistics of rainfall in2016and2016were the basic statistics.Firstly,the characteristics of geological disaster development distribution are analyzed.Secondly,the development law of landslide based on geographical location,lithology,slope height,elevation and elevation of leading edge is emphasized.Finally,a simple correlation coefficient is introduced to calculate the correlation between the number of landslide and rainfall in Huanggang area in2016.The conclusion can provide geological basis for the prevention and control of geological disasters in Huanggang.