【摘要】 本文对平底无阻力解进行了简炼化和延伸化的扩展，研究了无限水体的平底有阻力河床瞬间全溃的－阶和二阶渐近解，并推荐了实用解法。在上述基础上，提出了有限水体的平底有阻力的渐近解，并与数值解成果进行了对比验证。最后说明这种解法在数值计算中，可供选用合理的时间步长时参考。更多还原

【Abstract】 In the first place, this paper eXtends and simplifies the authors’solution of frictionless flat river. In the second place, the solution of transient entiredam-break problem in infinite length friction flat river is studied by successiveapproximation, including first order solution and second order solution, and thena practicable method to resolve the solUtion is recommended. Based on theabove advances, the solution in finite length friction flat river is developed. Thesolution is checked by using the authors’numerical calculation results. Finally,the practical value of the solution is discussed. It can be used to choose a rational time step in numerical calculation.更多还原