Study On Ecological Civilization-oriented Integrated Control And Regulation Of Water Resources

In this thesis, the objectives of the research are to ensure the coordinated development of socio-economic and ecological environment in the region by analyzing the water issues in-depth and systematically, and to propose an ecological civilization oriented integrated water resources regulation model, which would enable the scientific, structural and rational allocation of regional water resources and water use. Such a scheme would support the sustainable development of a social economy.In this thesis, the Dongting Lake is chosen as the research pilot area due to the prevailing water stressed issues. Based on the current situation of water resources, as well as the needs for future eco-civilization construction and socio-economic development, a comprehensive structure for ecological civilization-oriented water resources allocation scheme has been proposed. At the same time, the issue of a rationalized water resources allocation system has been examined. The proposed allocation scheme has been applied to allocate and adjust the water supply and water demand structure in the Dongting Lake area. The proposed scheme will also improve the efficiency and effectiveness of regional water resources utilization through the development of a water-saving society. Furthermore, it will also enable the realization of a full control of water resources in time and spatial, and achieve stable development of socio-economic and ecological environment. The main content of the thesis are as follows:(1) Set out the theoretical basis for ecological civilization-oriented integrated control and regulation of water resourcesWater resource is the core constraint of the construction of ecological civilization. The theoretical basis for ecological civilization oriented water resources control includes3parts: macro-economics, green development theory and ethical basis. The purpose of water resources regulation is to serve human beings, enable people to recognize the diversity of water use efficiency, thereby to control the process of water intake, water use, water consumption, and drainage, in order to allocate the water resources more scientifically and optimize overall efficiency.(2) Established an ecological civilization oriented river basin water resources control modelBased on the needs, objectives, constraints, and regional ecological civilization requirement for water resources control, an ecological civilization oriented water resources control model was developed. The model can be divided into five layers:regional macroeconomic forecasting model, the ecosystem succession model, water resources carrying capacity model, water system evolution model, and rationalised economic-ecosystem water resources simulation model. This model can simulate the water cycle response to the rational allocation of water resources, and realize the real-time dynamic configuration and simulation. For example the model can simulate the scale of economic development, and the industrial, agricultural, and domestic water use process under the industrial restructure, and continuous monthly water balance between supply and consumption at a given water consumption level.(3) Analysis of the needs of ecological civilization oriented water resources control The annual rainfall in the Dongting Lake area showed a significant upward trend from the1980’s to the mid1990’s, but decreased after that period. In the21st century the Dongting Lake area enters a dry period. The water resources situation did not change significantly in the Xiang, Zi, Yuan, and Li Rivers, but the runoff showing a decrease trend in the Sankou river system, which is particularly evident in the dry season. After the operation of the Three Gorges Project, the dredging of riverbed in Jingjiang (between Zhicheng and Ouchi) lead to further runoff reduction, which had a negative impact on the Jingnan Sankou region. In the Dongting Lake area of ecological civilization construction, requires the concept of ecological civilization into the development and protection of water resources, the formation of a unified regional water resources allocation pattern, and further study of ecological water demand, and continuous monthly water balance between supply and consumption at a given water consumption level in the Dongting Lake area.(4) Application of the ecological civilization-based rational water resources allocation scheme in the Dongting Lake areaAccording to the results of water supply and demand balance, the water resources in Dongting Lake area situation is as follows:(i) the water shortage at the50%,75%and95%guarantee rate in the status quo level year of2008are224million m3,1182million m3and2284million m3respectively,(ii) water shortage ratio in the Lake District are2.49%,12.15%and21.13%;(iii) In2020level year, the water shortage at50%,75%and95%guarantee rate are322million m3,1364million m3and2613million m3;(iv) water shortage ratio are2.90%,11.45%and19.98%.(v) In2030level year, the water shortage volume at50%,75%and95%are284million m3,1257million m3and2506million m3, and the shortage ratio are2.31%,9.65%and17.67%.As can be seen from the above results, full considerations were given to water saving, the potential, and appropriateness of new water supply projects, and through the rational allocation of water resources, the assurance of water supply in the Dongting Lake area has been improved compared with the status quo level year. The overall water shortage rate shows a downward trend, but there are still a gap between water supply and demand to some certain extent. On the one hand there is a need for improving of the water supply facilities, reservoir reinforcement, inland rivers and lakes, harnessing and their further development and utilization. On the one hand, there is a need for new and appropriate water conservancy projects in order to expand the water supply capacity to meet the fast economic and social development needs in the Lake District. For the Jingnan-Sankou water resource deterforation region, sluice gates will increase the amount of diverted water from the Yangtze River, promote the construction of river remediation, river and lake connectivity projects, and other ancillary works.