【摘要】 将局部最优能耗原理从单一河道拓展应用于分汊河型,据此建立分流比与汊道断面面积比和宽深比之间的河相关系,利用长江下游东流水道实测资料,对公式进行验证分析。对所推导的公式进行简化,并与通过其他途径所得公式进行比较。结果表明:局部最优能耗原理可推广应用于分汊河道,既适用于主河道与汊道情形,也适用于各个汊道之间;基于局部最优能耗原理所推导的分流比与断面面积比和宽深比之间的河相关系,经实测资料验证是正确的;分流前主河道断面面积可采用各汊道断面面积之和来替代,对计算精度几无影响;可对所推导的河相关系进行简化,经验证,简化公式是正确的;经与类似公式比较,说明基于不同物理原理,可得到相近的河相关系结果。更多还原

【Abstract】 In this paper, the application of local optimal energy expenditure hypothesis is extended from single-thread channel type to branching channel type. Based on the hypothesis, the morphological relationship of bifurcating discharge ratio, cross-sectional area ratio and width-depth ratio is established. The expression formula is verified and analyzed by using the measured data of Dongliu waterway in the lower reaches of the Yangtze River. The deduced expression is simplified and compared with another formula. The results show that: the local optimal energy expenditure hypothesis can be extended to branching channels,which is applicable to the situation of correlating main river and bifurcated channel as well as correlation between each bifurcated channel; based on the local optimal energy expenditure hypothesis, the relationship of the bifurcating discharge ratio,the ratio of cross-section area and width-depth ratio is proved correct by the measured data; the cross-sectional area of the main river before the diversion can be replaced by the sum of cross-sectional areas of each branch, which has little influence on the calculation accuracy; the derived relational expression can be simplified, and the simplified expression is proved correct after verification; the comparison with similar formula shows that similar results of river morphological relationship can be obtained based on different physical principles.更多还原