Non stationary flows. Economical planning of pipelines. Pumping systems. Syphons. Mass oscillations. Hydraulic hammers. Air tank for controlling water hammer. Lateral discharge. Gradually varied flows. Sediment transport. Morphodynamics. Helmoltz decomposition of vectorial fields. Gravity waves: linear theory and finite amplitude theory. Energy propagation in gravity waves. Shoaling, Refraction, Diffraction. Seiches in horbours. Breaking waves.