湖泊调蓄作用对河网计算的影响

Effection of lake-saving on calculation of complex river systems

分析了Muskingum法及其衍生的水动力学模型在水流计算中的优缺点,以及湖泊调蓄作用的计算方法,在此基础上建立了能够反映湖泊调蓄作用的河网模型,并采用荆江 洞庭湖河网水系1996和1997年的相关资料进行了对比计算。结果表明,考虑湖泊的调蓄作用时,模型的计算值与实测值吻合较好,说明对湖泊调蓄作用的处理是较为符合实际情况的,所建模型具有较好的适用性。分析了湖泊调蓄作用对河网水沙数值计算影响的复杂性。

The article studies the Muskingum method, its advantages of the hydrodynamic models and the way to calculate the lake-saving.And a numerical model that can reflect effection of the lake-saving is established, which is validated by using the observed data of the Jingjiang River and the Dongting Lake in 1996 and 1997.The result indicates that the model is suitable to deal with lake-saving. At the end,the article studies the complexities of lake-saving in calculating complex river systems.