冲积河流能量耗散理论的研究

Study on Energy Dissipational Theory of Alluvial Rivers

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。

The concept of river entropy is introducted. On the Basis of the trend law of river system, the self adjusting mechanism and energy dissipating properties of alluvial rivers are analyzed from the point of the view of the system. According to the variation principle, the energy dissipating pattern of river systems is developed and the relation between the freedom digree of river bed adjustment and river energy dissipation in consideration of the river distrubance by human activities is further studies. The cause of increase of the activity of riverbed is pointed out, and a law of winding coefficient for the Inner Mongolia reach of the Yellow River is given.