人民长江
人民長江
인민장강
YANGTZE RIVER
2015年
1期
83-85
,共3页
变步长%差分迭代%水面曲线推求%不规则断面河道
變步長%差分迭代%水麵麯線推求%不規則斷麵河道
변보장%차분질대%수면곡선추구%불규칙단면하도
variable step%difference iterative%water level profile calculation%river channel with irregular cross section
在计算天然河道水面线时，由于河道的不规则性，导致计算断面间距往往是不相等的。为此，依据水力学能量方程，建立了变步长差分迭代的水面曲线模型。该数学模型简单易行，适应性强，便于程序化实现。通过对河南省南部某河道治理工程水面线的推求验证，证明该方法可有效解决非等间距断面的水面线推求问题，且计算效率和精度较高，可为计算类似工程问题提供参考。
在計算天然河道水麵線時，由于河道的不規則性，導緻計算斷麵間距往往是不相等的。為此，依據水力學能量方程，建立瞭變步長差分迭代的水麵麯線模型。該數學模型簡單易行，適應性彊，便于程序化實現。通過對河南省南部某河道治理工程水麵線的推求驗證，證明該方法可有效解決非等間距斷麵的水麵線推求問題，且計算效率和精度較高，可為計算類似工程問題提供參攷。
재계산천연하도수면선시，유우하도적불규칙성，도치계산단면간거왕왕시불상등적。위차，의거수역학능량방정，건립료변보장차분질대적수면곡선모형。해수학모형간단역행，괄응성강，편우정서화실현。통과대하남성남부모하도치리공정수면선적추구험증，증명해방법가유효해결비등간거단면적수면선추구문제，차계산효솔화정도교고，가위계산유사공정문제제공삼고。
In calculation of water level profile of natural river channel, the calculated distance of cross sections are usually un-equal due to due to channel irregularity. For this reason, according to hydraulic energy equation, a variable step size difference iterative model for calculation of water level profile was established. The model was characterized as simple, strong adaptability and easy to be programmed. By application to a river channel in south Henan Province, it was demonstrated that the model can effectively calculate the water level profile of river channels with unequal interval distance and was high in calculation efficiency and accuracy.
