Zhong De-yu

Sky River: Discovery, concept, and implicationsfor future research

Presented in this paper is a brief introduction to our recent discovery and definition of Sky River, as well as its implications for future research. Based on meteorological reanalysis data, we found that there exist highly structured water vapor conveyance systems in the troposphere of the atmosphere. The water vapor conveyance systems have higher vertically integrated flux than their immediate environments, consisting the dominant channels from local scale to global scale for atmospheric water vapor transfer. The water vapor transfer systems in the troposphere share the similarity of having high water (vapor) conveyance with land surface rivers and thus can be referred to as “River in the Sky”, or simply “Sky River”. Sky River is different from “atmospheric river” essentially in that it is a global system where water vapor concentrated and conveyed by atmospheric circulations, rather than the transient and local high flux belts found in previous studies. Studies on the Sky Rivers will help us to have a new vision about global atmospheric water vapor transfer and a better understanding of global water cycle.

Research on the operation of cascade reservoirs combined navigation part I: Concept and framework of distributed transport system coupled land and water

This paper systematically discusses the research ideas and technical framework of cascade reservoirs combined navigation operation. First, through the comprehensive analysis of the characteristics of cascade reservoir features and navigation channel, the potential of cascade reservoirs combined navigation operation and its key technical problems were pointed out clearly. In response to these difficult issues, a new research idea on the distributed system of water and land transportation was set as the core for solving framework. Then, we focus on the construction strategy of the transport system that was driven by the water and land transport, establish the optimization model cascade reservoirs combined shipping scheduling, and give its solution techniques combined with the model features. The above points form a reliable and systemic solution method for cascade reservoirs combined navigation operation, which can provide effective technical support for schedule planning and implementation of other cascade reservoirs combined navigation.

Simulation of suspended load transport based on two-phase mixture model

This paper aims at simulation of suspended load transport through three-dimensional numerical model. Based on the hydrodynamic model of SELFE and two-phase mixture flow, the transport equation is completed and discrete equation with relevant boundary conditions is set up. To verify the new model, different calibration tests are carried, moreover whose results satisfy. Finally, the three-dimensional model is used to study the flood of 2012th year between the Qingtongxia & Shizuishan in Ningxia-Inner Mongolia Yellow River. In addition, this study mainly focuses the character of the flood propagation, circulation features, sediment transport as well as river-bed erosion and deposition. The results reveal that the computed water levels, landform and sediment concentration show good agreement with the measured data. The circulation features are also in accordance with the theoretical analysis. All these indicate that the modified model can effectively simulate the suspended load transport.