Z指数方法在小流域洪涝灾害预警技术研究中的应用  

Application of Z Index in Flood Disaster Prewarning for Small Drainage Areas

作　　者：蔡敏 黄艳 朱宵峰 夏晓丰 

机构地区：[1]浙江省金华市气象局,金华321000

出　　处：《气象科技》2010年第4期418-422,共5页Meteorological Science and Technology

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

关 键 词：Z指数 小流域 洪涝指数 

分 类 号：P426.616[天文地球—大气科学及气象学]