分流量区间BMA方法在小流域暴雨山洪模拟中的应用——以官山小流域为例

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小流域山洪灾害具有成灾时间短、突发性强、危害性大、频次多等特点,严重威胁着区域内社会经济发展和人民群众生命财产安全。受当前山区雨洪资料少、产汇流机理不够完善所限,小流域的暴雨洪水模拟存在着可靠性差、精度低的问题。以我国中部秦巴山区山洪灾害典型流域官山小流域为研究对象,搜集了近期代表性较好的10场洪水,以TOPMODEL、TUWMODEL和新安江模型结果为基础,基于分流量区间BMA方法计算模型权重,提出适用于小流域的水文集合预报模型。结果显示,相比单一水文模型,分流量区间BMA方法模拟的洪峰流量、洪量和峰现
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