重庆城市化对指数化降水变率及新增雨系数影响的研究

Research on the Influence of Chongqing Urbanization on Indexed Rainfall Variability and New Rainfall Coefficient

为了探究城市化进程对城市降水量的影响,使用简单移动平均法探究分区研究的可靠性和代表性;改进降水变率和增雨系数,定义2个全新的年际衡量指标—指数化降水变率,新增雨系数,从定性和定量2个角度研究城市化对二者的影响及相关关系。结果表明:重庆市城市化的水平受多方面的影响,在时间序列上呈现稳步上升的趋势,如今已处于成熟阶段并趋于稳定状态。重庆市城市化进程促进同期的新增雨系数的增加,抑制城市中指数化降水变率的变化,使得年平均降水量在小范围内波动,可通过控制城市化的发展进程协调城市降水量与降水变率,进而合理管控水资源循环过程,调整城市生态环境,改善人们生活环境,促进社会全面健康可持续发展。

To explore the impact of urbanization on urban precipitation,the simple moving average method are used to explore the reliability and representativeness of zoning research;precipitation variability and precipitation enhancement coefficient are improved;two new inter-annual metrics are defined-indexed rainfall variability,new rainfall coefficient;the impact of urbanization on the two and the related relationship from both qualitative and quantitative perspectives are studied.Research indicates:the level of urbanization in Chongqing is affected by many aspects,there is a steady upward trend in the time series,it is in a mature stage and tends to be stable.The urbanization process of Chongqing promotes the increase of the new rainfall coefficient during the same period,suppresses the change of indexed precipitation variability in the city,and the average annual precipitation fluctuate are made in a small range.The urban precipitation and precipitation variability can be coordinated by controlling the development process of urbanization,the cycle of water resources can be rationally controlled,the urban ecological environment can be adjusted,the people′s living environment can be improved,and the comprehensive and healthy development of society can be promoted.