Variation of the Yellow River's water and sediment processes and the complex response of the river channel

Author: Hu Chunhong
Publisher:
Publish Date: 2005-01-01
Features: This book is a systematic summary of the research findings from the project "Variability of the Yellow River Water-Sediment Process and the Complex Response of the River Channel" under the National Key Basic Research Development Program Project (973 Project) (G1999043604). The book is based on the principles of the water cycle and water resource evolution, taking the variability of the water-sediment process and the shrinkage of the river channel under the dual influence of natural factors and human activities as the starting point. It reveals the mechanism of "small floods causing big disasters" in river channels under varying water-sediment processes and proposes measures for the regulation and control of the lower Yellow River channel. The main research findings include the establishment of three models, four theoretical research advancements, and four applied research advancements. This book can serve as a reference for scientific and technical personnel engaged in research on sediment transport mechanics, river bed evolution and channel regulation, soil and water conservation, flood control and disaster reduction, water-sediment resource allocation and utilization, and Yellow River governance, as well as for faculty and students in relevant disciplines at universities and colleges. The book elaborates on the dynamic balance among vegetation development, soil erosion, and human activities, establishes the theory and equations of vegetation erosion dynamics, and applies them to the evaluation of the effectiveness of ecological construction. It further explores the variation mechanisms of the sediment erosion, transport, and deposition characteristics of river basins under human activities and the changes in the basic processes of water-sediment movement, revealing the patterns of runoff and sediment production in river basins under human activities. Additionally, the book systematically studies the evolution patterns of the shrinking river channels in the lower Yellow River under varying water-sediment processes, including the formation of shrinking river channels, bed-forming discharge, channel-related relationships, longitudinal and cross-sectional profiles, flow capacity, and the movement mechanisms of high-sediment-content floods of the "small water, large sediment" type. It also discusses the "small water, big disaster" effects of shrinking river channels and the disaster-causing mechanisms under different water-sediment conditions. Based on this, the book investigates the variations in water and sediment inflow and sediment supply under different conditions.