%0 Journal Article
%T The characteristics of dike-break flood in different scenarios of the lower Yellow River based on numerical simulations<br>
%A MA Xin
%A YANG Peiguo
%A YANG Qinye
%A KANG Xiangwu
%A XIA Fuqiang
%A <br>
%J 地理学报
%D 2007
%I 
%X The lower Yellow River still faces the threat of flood due to the unusual precipita-tion caused by global environmental change, river channel sedimentation, hidden danger in the dike and unfavorable river regime of “hanging river”. According to the characteristics of the dike-break flood of the Yellow River, this paper has simulated, in six different scenarios, the dike-break flood routing by inputting the terrain data, typical historical flood data and land use data of study area to two-dimensional unsteady flow model. The results show that: firstly, the routing process of flood will occupy other rivers on the way and return to the rivers after reaching the lower reaches; secondly, in the same river reach, flood inundating area of north band is bigger than that at corresponding location of south bank under the same historical flood; thirdly, it is different in the degree of flood inundation in different regions due to different geographical locations in flood plain; fourthly, the area of mainstream where flood is deep and flow velocity is quick is relatively smaller, but the area of non-mainstream, where flood is shallow and flow velocity is slow, is relatively big; and finally, the possible influenced area of the dike-break flood is 141,948 km2.
%K lower Yellow River
%K dike-break
%K 2-dimensional unsteady flow model
%K characteristics of the flood routing<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=869B153A4C6B5B85&jid=F7B5B947C24B9D649491012214E4BEF4&aid=B8E7E8D8DA84B7E9C0D2924E04498608&yid=A732AF04DDA03BB3&vid=BCA2697F357F2001&iid=CA4FD0336C81A37A&sid=CD775AE9DDBD7B53&eid=8C83C265AD318E34&journal_id=0375-5444&journal_name=地理学报&referenced_num=0&reference_num=0