Abstract: A k-ε turbulent model and a large eddy simulation (LES) model were used separately to investigate three-dimensional flows of oblique submerged water jets in a plunge pool. Characteristics of flow velocity, voriticity and pressure were obtained and compared with our particle image velocimetry (PIV) measurements. When a jet nappe was plunging into the pool, the flow in the pool was typically three-dimensional, showing temporal and spatial randomness in the jet trajectory and its velocity and pressure distributions under the action of moving turbulent eddies upstream and downstream of the jet. For such oblique submerged jets, the k-ε turbulent model is unable to describe the randomness of this type due to its assumption of isotropic eddies while LES can produce flow structures with temporal and spatial randomness in the jet trajectory and the fields of velocity, vorticity and pressure. Our LES results agree better with the PIV measurements, revealing the evolution of jet plunging into the pool and its mechanism of energy dissipation.