【摘要】 对韩江三角洲河网区河道进行概化,采用Preissmann有限差分格式和松弛迭代法建立韩江三角洲河网水动力数学模型,并利用2005年的实测水文资料对韩江三角洲河网的水面线、分流比进行验证,最后对2个整治工程方案的整治效果进行模拟计算和方案比选。结果表明:水位计算值与实测值误差一般小于0.05m;分流比计算值与实测值误差小于1%;在整治流量条件下,各河道水位变化很小,分流比增加值最大为2.35%;在洪水条件下,水位壅高值最大为0.07 m,分流比增加值最大为2.06%。更多还原

【Abstract】 Based on the generalization of the river networks of Hanjiang River Delta,a hydrodynamic model for the river networks was developed for Hanjiang River Delta by using Preissmann finite difference scheme and relaxation iterative method.Then,the water level curves and flow division ratio of the river networks obtained by the model were verified with the measured data in 2005.The effects of different regulation schemes were simulated and the schemes were compared.The results show that the differences between the calculated and measured data of water levels are generally smaller than 0.05m,and that the relative errors of the calculated results of flow diversion ratio is less than 1% as compared with the measured data.It is also indicated that the change of water level of each channel is very small,and the maximum increment of flow diversion ratio is 2.35% at the regulated discharge after completion of the project,while under the condition of floods,the maximum increment of water level is 0.07 m,and the maximum increment of flow diversion ratio is 2.06%.更多还原