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引入河流熵概念，根据冲积河流发展趋向性法则，从系统角度探讨了冲积河流系统自我调节机制及河流能量分配耗散特点．以变分原理为基础，推求了河流系统能量耗散规律；结合人类活动对河流的干扰，研究分析了河床调整自由度与河流能量分配、耗散间的制约关系．文中还指出了近年来黄河内蒙河段河床活动性增强的原因，并给出了该河段曲折率的变化规律
According to the rule of alluvial river development trend, the self-regulation mechanism of alluvial river system and the energy dissipation of river are discussed. Based on the principle of variational principle, the energy dissipation law of the river system is deduced. Based on the disturbance of human activities to the river, the relationship between the degree of freedom of riverbed adjustment and the energy distribution and dissipation of the river is studied and analyzed. The paper also points out the reason why the river bed activity in the Inner Mongolia reach of the Yellow River increased in recent years, and gives the change rule of the tortuosity in this section