摘要
Z指数方法在洪涝统计方法中得到广泛应用,考虑小流域洪涝灾害的时空特点,采用任意连续10天法计算的洪涝Z指数更科学,更能反映实际。通过对流域内单站洪涝指数的确定,并与常规月洪涝Z指数的对比,新方法能较好弥补常规方法的缺陷,较好描述洪涝灾害的强度和起止时间,由其计算而得的流域综合洪涝指数,对历史洪涝个例有较高拟合度。
The Z index is widely used in flood statistics.Taking into account the temporal and spatial characteristics of flood disasters in small drainage areas,the 10-day continuous rainfall proved to be more realistic and reasonable for calculating Z index.Through determining the flood disaster index of a single station and then compared with the traditional index,it is found that the new method can make up the deficiencies of the traditional one and describe the strength and starting and ending times of flood disasters.The flood disaster index computed by means of uhe new method can well fit the historical flood disaster cases over small drainage areas
出处
《气象科技》
北大核心
2010年第4期418-422,共5页
Meteorological Science and Technology
关键词
Z指数
小流域
洪涝指数
Z index
small drainage area
flood disaster index
