针对中国多闸坝重污染河流的典型代表——淮河中游河网,为提高其流域水环境预警及应急响应能力,依据水文-水动力-水质耦合数学模型DHQM(Hydrology,Hydrodynamics,and Water Quality Model)的理论框架,构建了由淮河干流、沙颍河和涡河3...针对中国多闸坝重污染河流的典型代表——淮河中游河网,为提高其流域水环境预警及应急响应能力,依据水文-水动力-水质耦合数学模型DHQM(Hydrology,Hydrodynamics,and Water Quality Model)的理论框架,构建了由淮河干流、沙颍河和涡河3个一维模块和鲁台子、蚌埠闸2个二维模块组成的淮河中游河网水文-水动力-水质耦合数学模型。采用经过验证的模型针对一个虚拟的水污染事故情景,分析了不同调度方案与淮河干流来水组合下污染团下泄对下游水质的影响;并以保障淮河干流蚌埠市饮用水源地的取水水质安全和减轻事故对下游水质的影响程度为目标,优选出分期小流量慢速下泄污染水体为最佳的水量水质联合应急调度方案。展开更多
This research uses the 59th-70th national emergency early warning information release monthly report data of China to study the total number of emergency early warnings in 2021, the general situation of early warning ...This research uses the 59th-70th national emergency early warning information release monthly report data of China to study the total number of emergency early warnings in 2021, the general situation of early warning categories and regional distribution differences. The results show that: 1) there are 387,075 early warning information in China in 2021, and the early warning has obvious seasonality. 2) The issuance of early warnings is obviously related to the seasons, and the issuance of early warnings varies from month to month. The issuance of one kind of early warning can easily lead to the issuance of another kind of early warning, that is, the early warnings are closely related, and some specific disasters are easy to cause secondary disasters. 3) There are differences in the number of early warnings in each province. 4) The reason for the peak of early warnings in July and the large proportion of red early warnings in Henan Province is the sudden heavy rainstorm in Henan Province in July;the physical mechanism of this heavy rainstorm is sufficient water vapor, strong uplifting movement and stable situation and a long existence time.展开更多
文摘针对中国多闸坝重污染河流的典型代表——淮河中游河网,为提高其流域水环境预警及应急响应能力,依据水文-水动力-水质耦合数学模型DHQM(Hydrology,Hydrodynamics,and Water Quality Model)的理论框架,构建了由淮河干流、沙颍河和涡河3个一维模块和鲁台子、蚌埠闸2个二维模块组成的淮河中游河网水文-水动力-水质耦合数学模型。采用经过验证的模型针对一个虚拟的水污染事故情景,分析了不同调度方案与淮河干流来水组合下污染团下泄对下游水质的影响;并以保障淮河干流蚌埠市饮用水源地的取水水质安全和减轻事故对下游水质的影响程度为目标,优选出分期小流量慢速下泄污染水体为最佳的水量水质联合应急调度方案。
文摘This research uses the 59th-70th national emergency early warning information release monthly report data of China to study the total number of emergency early warnings in 2021, the general situation of early warning categories and regional distribution differences. The results show that: 1) there are 387,075 early warning information in China in 2021, and the early warning has obvious seasonality. 2) The issuance of early warnings is obviously related to the seasons, and the issuance of early warnings varies from month to month. The issuance of one kind of early warning can easily lead to the issuance of another kind of early warning, that is, the early warnings are closely related, and some specific disasters are easy to cause secondary disasters. 3) There are differences in the number of early warnings in each province. 4) The reason for the peak of early warnings in July and the large proportion of red early warnings in Henan Province is the sudden heavy rainstorm in Henan Province in July;the physical mechanism of this heavy rainstorm is sufficient water vapor, strong uplifting movement and stable situation and a long existence time.
