China Water Resources

A preliminary discussion of the engineering ethics and advanced cultural in Dujiang Weir

The Chinese people has thousands years of history for water governance.The practices of water governance,utilization and management of successive dynasties have left us with rich material,institutional and spiritual wealth.In order to explore the multiple values of this world cultural heritage,discussions are made on the contribution of those outstanding water projects represented by Dujiang Weir,so that Chinese wisdom and China's plan can be developed to address issues of imbalance between water supply and demand and other water crisis.Eco-friendly water project construction in the new age should be led by advanced water culture,with learning from good practices of Dujiang Weir from conservation and cultural prospective,so as to build a society with harmony of man and water and water structures in a modernized and eco-friendly ways.

Human activity and the global climate change and its impact on water resources

In understanding the effect of human activity on the global climate change for recent 100 years, IPCC (Intergovernmental Panel on Climate Change) has played a key role. During 17 years from 1990, IPCC has continuously gained insight into better understanding on the global climate change during the recent 100 years mainly caused by human activity, with its four assessment reports. This achievement has been made with provision of three aspects of evidences: (1) rapid increase in greenhouse gases since preindustrial era (after 1750); (2) temperature rise or warning of surface, tropospospere and oceans; (3) 100-yr climate simulations since 1900 for detection and attribution of the past climate change. These results have shown that recent 100-yr warming is jointly caused by natural climate fluctuation and anthropogenic activity, but most of recent 50-yr climate change is caused by the authropogenic activity. The present paper has first reviewed this issue. Then, the debates and uncenrtainties of global climate change issue have been discussed. The global climate change has had a significant impact on global water resources and management. This issue is further discussed based on changes in temperature, precipitation, sea level rise and evapotranspiration, which may be a necessary scientific basis for adaptation.

Discussions on key issues of water ecological civilization construction

How to understand water ecological civilization construction? On the basis of the interpretation of the spirit of the 18th National Congress of the Communist Party of China,this paper analyses and discusses several key issues of water ecological civilization as follows.First,the definition and connotation of water ecological civilization are given and the links between water ecological civilization construction and ecological civilization construction proposed by the state are elaborated.In addition,this paper analyses the crucial issues which should be paid attention to during the process of advancing water ecological civilization,and proposes specific recommendations to help to make the 5 goals of water ecological civilization come to be realized.

Thought of ancient "sponge city" : experiences of applying water-adaptive landscape

"Sponge city" is regarded as a new approach to deal with serious ecological and environmental problems under the process of fast urbanization at present. In ancient times, we have accumulated valuable experiences of building adaptive landscapes in the process of water resources management over a long period of time and fighting against various water disasters, such as selection of site of settlement, water resources management in cities and formation of cities. This approach has reflected the thought of "sponge city" that has great significance to the design of city landscape. Research and studies on adaptive landscape in ancient cities by academic field both home and abroad in recent decades are introduced, among which the study results from the Middle East, Ancient Greece, Ancient Rome and ancient mayan civilization are plenty and most of the studies focus on water diversion and storage works. The contents and type of adaptive landscape are affected by precipitation and landscape characters. The key areas of current studies have transformed from single factors such as flood control or drought relief into comprehensive research including examining complex structure and complicated functions of water landscape. Along with development of modern technology, how to improve theories of "sponge city" construction and practice has become a key subject for modern landscape design, facing the increasingly degradation of water environment and ecosystem and the fact of heritages of water landscape in ancient cities have been damaged and disappeared with each passing day.

The Outline of the 14th Five-Year Plan(2021—2025) for National Economic and Social Development and the Long-Range Objectives Through the Year 2035 of P. R. China

Countermeasures for rainstorm and flood prevention in high-density cities——the “7·20” heavy rain revelation in Zhengzhou

Urban rainstorm flood disaster is the most prominent urban flood disaster in China. Combined with the "7·20" heavy rain revelation in Zhengzhou, through in-depth analysis of the main characteristics and causes of heavy rainfall and flood in high-density cities in China, from the three aspects of "resilience of defense system, resilience of infrastructure, and less loss in extreme rainstorm", the countermeasures of rainstorm flood prevention and control in high-density cities are proposed. It provides a new idea for solving urban flood problems systematically and improving urban flood defense and resilience.

Considerations for Leader Responsible System in governance of rivers and lakes

10-year exploration of Leader Responsible System in governance of rivers and lakes is summarized. On this basis, five aspects of its effect are indicated: grasping basic information of main rivers and lakes, deepening renovation of rivers and lakes, putting long-acting management into practice, forming resultant force of governance, improving water environment. Countermeasures of Leader Responsible System in governance of rivers and lakes are proposed:linking up with current system, turning passive emergency mechanism into normalization, improvement of related laws and policies, encouraging people to participate.

The domestic and overseas research development in ecological restoration of water environment

In our country,water pollution mostly includes two hands,one is nitrogen and phosphorus nutrition,the other is organic contamination.At present physical,chemistry and bio-ecological methods are the main technologies on international.This paper briefly analyzes domestic and overseas interrelated literatures and information in recent years,it summarizes the research development from method aspect in ecological restoration of river?lake and other water environment,and their respective advantages and disadvantages have been compared.

Speech at the Symposium on Ecological Protection and High-quality Development of the Yellow River Basin

Accelerate to build smart water system with the function of “four pres”