Subjects: Hydraulic Engineering >> Hydraulic Management submitted time 2021-09-01
Abstract： "
Peer Review Status:
Awaiting Review
Subjects: Hydraulic Engineering >> Flood Control submitted time 2021-09-01
Abstract： "
Peer Review Status:Awaiting Review
Subjects: Hydraulic Engineering >> Hydraulic Management submitted time 2021-09-01
Abstract： "
Peer Review Status:Awaiting Review
Subjects: Hydraulic Engineering >> River Silt Engineering submitted time 2021-09-01
Abstract： "
Peer Review Status:Awaiting Review
Subjects: Hydraulic Engineering >> Environmental Water Conservancy submitted time 2021-09-01
Abstract： Water is the lifeblood of Yellow River, and the eco-environmental health of rivers and lakes is one of the core elements for ecological protection and high-quality development of Yellow River Basin. How to realize comprehensively eco-environmental recovery of rivers and lakes in Yellow River Basin is the hot issue in current. The entropy model based on the proposed Environment Development Index is employed, in this paper, to evaluate the evolution characteristics of rivers and lakes eco-environment in Yellow River Basin and to analyze the existing problems. Then, the goal and pattern for the eco-environmental recovery of rivers and lakes in Yellow River Basin are discussed and the corresponding ideas are put forward. The results show that (1) the eco-environmental system of Yellow River Basin is changing from disordered development to orderly development; (2) Measures such as unified operation of the main Yellow River, soil and water conservation can promote the eco-environmental recovery of rivers and lakes in Yellow River Basin; (3) It is necessary to coordinate the upstream and downstream areas, the left and right banks, and the water and land areas, with the goal of ecological protection and treatment, groundwater over-extraction and comprehensive control of soil and water loss, so as to continuously promote the eco-environmental full recovery of rivers and lakes in Yellow River Basin. "
Peer Review Status:Awaiting Review
Subjects: Hydraulic Engineering >> Basic Disciplines of Hydraulic Engineering submitted time 2021-02-22
Abstract： Quality and stability are the basic characteristics of the ecosystem, which comprehensively reflect the structure, process, and functional integrity of the ecosystem and the ability to resist interference, self-regulation, and dynamic balance. The Yellow River Basin is a complex giant system composed of many elements. The management and protection of the river basin ecosystem has received more and more attention. It is necessary to start from the integrity of the ecosystem, make overall considerations, and implement comprehensive policies to improve the quality and stability of the ecosystem, and promote a virtuous cycle of the ecosystem, so the quantitative description of system quality and stability is very important. This paper uses the entropy weight model to establish a multi-index long-term series of Ecosystem Quality Index (EQI) to quantitatively describe the changes in ecological quality in the Yellow River Basin in the past 40 years; at the same time, use the dissipative structure theory and the Brussels model to establish the steady-state transformation of the ecosystem Quantitative indicators and methods provide ideas for the study of steady-state transformation of the Yellow River Basin ecosystem. The study found that: (1) The average EQI value of the Yellow River Basin ecosystem over the past 40 years is 0.64, the maximum value is 0.70, and the minimum value is 0.59. The overall quality is showing an oscillating trend for improvement; (2) The steady-state conversion power value of the system is less than 0, indicating that the steady-state conversion power of the ecological-human-society coupling system in the Yellow River Basin is low, but the overall trend is oscillating upward, and the overall trend is getting closer and closer to the critical conditions for achieving steady-state conversion.
Peer Review Status:Awaiting Review
Subjects: Hydraulic Engineering >> Basic Disciplines of Hydraulic Engineering submitted time 2021-02-19
Abstract： The Yellow River Basin is a complex giant system with numerous elements and complex relationships, which are both interrelated and mutually restrictive. Since the people's control of the Yellow River, watershed governance and protection have achieved remarkable results, but there are still some outstanding problems, which fully embodies the "appearance in the Yellow River, roots in the basin", and reveals the complexity, coordination and integrity of watershed governance and protection work. The high-quality development of the river basin needs to break the traditional "headache and foot pain" river basin governance model, and carry out more in-depth research from the perspective of comprehensive governance, system governance, and source governance. In particular, it is urgent to study the comprehensive evaluation theory of watershed development quality. Based on basic theories such as system science and information theory, this research puts forward a comprehensive evaluation theory of watershed development quality, constructs a basin development index (BDI) and a three-tier evaluation system of macro-medium-micro level, and explores the evolution law of the watershed giant system, Provide technical support and theoretical basis for river basin governance and protection."
Peer Review Status:Awaiting Review
Subjects: Hydraulic Engineering >> River Silt Engineering submitted time 2021-01-29
Abstract： This article systematically summarized the development process of the operation mode of reservoirs on sediment-laden rivers in China since the 1950s, especially explained the application and design technology of "storing clean water and regulating muddy flow". The so-called " storing clean water and regulating muddy flow " application is to fully consider the changes in the incoming water and sediment process in the reservoir according to the requirements of the reservoir development task, and coordinate the impact of the sediment on the siltation form and effective reservoir capacity to maximize the coordination degree of the water-sediment relationship in the downstream river as the core. Through the comprehensive coordinated control of "blocking, regulating and discharging", the comprehensive utilization benefits of reservoirs can be brought. In design, in order to better exert the reservoir regulation function, it is necessary to consider the demand for storage capacity of water and sediment regulation, and set up sufficient water and sediment regulation storage capacity to reduce the adverse impact of the forced sediment discharge of the reservoir on the downstream water-sediment relationship. The storage capacity distribution design is based on the rules of “deep channel for sediment regulation, medium channel for benefit and high channel for flood regulation”, to avoid the use of effective reservoir capacity due to sedimentation. Rivers with ultra-high sediment content should set abnormal sediment discharge bottom outlets to form a "normal + abnormal" double sediment erosion datum plane, to realize the recycling of part of the sediment storage capacity, and the integrated utilization of sediment storage capacity and water and sediment regulation storage capacity. Reservoir should adopt water and sediment separation development method, which is “"mainstream large reservoirs for sediment regulation, tributary small reservoirs for water supply", in rivers with super high sediment content to solve the contradiction between effective reservoir capacity maintenance and water supply regulation. On the basis of achieving long-term preservation of effective storage capacity, "storing clean water and regulating muddy flow" better takes into account the needs of reservoir water and sediment regulation in sediment-laden rivers. The results will provide guidance and reference for the reservoir engineering design and operation of sediment-laden river, in the current and future periods.
Peer Review Status:Awaiting Review
Subjects: Hydraulic Engineering >> Basic Disciplines of Hydraulic Engineering submitted time 2021-01-26
Abstract： Ecological conservation and high-quality development of the Yellow River Basin has become a major national strategy. The socio-economic development of the Yellow River Basin is one of the main factors affecting the governance and protection of the Yellow River. It has become a scientific issue to analyze the law of socio-economic development of the Yellow River Basin and give countermeasures. . This paper selects 12 socio-economic characteristic indicators from four perspectives: population characteristics, residents’ quality of life, economic growth level, and regional industrial structure. The social development index (SDI) is calculated by the entropy method, and the Yellow River Basin is quantitatively analyzed in the past 40 years. The research shows that the social development index of the Yellow River Basin in the past 40 years shows a trend of "down stable up", especially after 2012, with the gradual maturity of economic transformation, the social development of the Yellow River Basin is on the whole better. "
Peer Review Status:Awaiting Review
Subjects: Hydraulic Engineering >> Basic Disciplines of Hydraulic Engineering submitted time 2021-01-26
Abstract： The Yellow River is the mother river of Chinese nation. In recent years, the inflow and sediment of the Yellow River have decreased, with extreme climate events occurred frequently, the boundary conditions have changed greatly. As the rapid economic and social development, it is necessary to carry out river health diagnosis under the changing environment. This research adopted information entropy and entropy weight methods to study the evolution characteristics of the healthy development of the Yellow River basin. Results showed that: (1) The river system presented healthy in 1980~1986, unhealthy in 1987~1999 and sub-healthy in 2000~2019. (2) The river system showed a healthier trend within 1980~1984, an increasingly unhealthy trend in 1984~1996, while following a good development trend in 1996~2019. (3) The flood discharge capacity of the main channel of the Ningxia-Inner Mongolia reach and the total amount of erosion and deposition in the downstream are the most sensitive factors.
Peer Review Status:Awaiting Review
Subjects: Hydraulic Engineering >> Basic Disciplines of Hydraulic Engineering submitted time 2021-01-25
Abstract： The ecological environment of the Yellow River Basin is systematic and complicated. It is of great significance to study the quantitative evaluation and change characteristics of the Yellow River Basin by providing scientific basis on integrated river basin management. This in one of the current widespread concerns and urgent problems to be solved. Through calculating the entropy weights of eco-environmental indicators in Yellow River Basin from 1980 to 2019, the dynamic entropy weight results were verified. Then the importance of the individual indicator in system was proved to be variable. On this basis, the EDIs (Environment Development Indexes) of the Yellow River Basin from 1980 to 2019 were analyzed and plotted by curve, which valued between 56.64～76.60. The changing trend of EDI in the Yellow River Basin was almost presented stabilized before 2003, and continuously increasing from 2003. The results show that through the years of protection and restoration, the ecological negative feedback was exerted profound effect, resulting the ecological environment of the Yellow River Basin was changing well.
Peer Review Status:Awaiting Review
Subjects: Energy Science >> Energy Science （General） submitted time 2020-07-05
Abstract： This paper proposes a unitary clean energy construction model based on the complementary multi-energy of wind, light, hydropower and pumped energy storage, combined with the Heishanxia, Qikou and Guxian water conservancy projects planned by the Yellow River water and sediment regulation system, relying on the Yellow River the rich water, wind, light, land, and terrain resources in the Ω Region are controlled by the power supply to achieve stable output, and the idea of building three clean energy bases with complementary wind, light, water, and pump energy storage is proposed to replace fossil energy, realize water saving and emission reduction, and help the ecological protection and high-quality development of the Yellow River Basin. " "
Peer Review Status:Awaiting Review
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