1) emphasizes multidisciplinary comprehensive research. Based on the idea and viewpoint of sustainable utilization of water and soil resources, using the theory and method of systematic analysis, taking surface water and groundwater resources, land resources and ecological environment as an organic whole, comprehensively considering the relationship between the development and utilization of water and soil resources, economic development and environmental protection between the upstream and downstream, and carrying out research on geoscience, hydrology, water resources, agronomy, ecology, environmental science and sociology.
2) Pay attention to the application of advanced exploration and research methods, such as 3S technology, isotope technology and computer simulation technology. Improve the efficiency and accuracy of field work, enhance the ability of comprehensive analysis of problems, realize the automation of data processing and the digitization of results, and achieve the purpose of saving funds and improving the level of scientific research.
3) Pay equal attention to introduction and development, and carry out necessary international cooperation research. Cooperate with Zurich University of Technology and Netherlands Institute of International Basic Engineering, Water Conservancy and Environmental Engineering to develop and manage water resources in western China, and introduce simulation software for sustainable management of water resources, software for estimating evaporation from satellite remote sensing data and software for regional groundwater geographic information system.
4) In order to better serve the social and economic development, we should emphasize the close cooperation and cooperation between scientific and technological personnel and local government departments, pay full attention to the realizability and operability of scientific and technological achievements, and make them easy for the government and the public to understand and accept.
0.3.2 Technical route
This project is based on the complex system entity of water and soil resources, economy, society and ecology in the inland river basin, focusing on the study of water cycle and sustainable utilization of water resources, taking into account other factors. In order to achieve the research objectives, the project is divided into the following five topics: ① Study on the regional groundwater resources geographic information system in the inflow basin of northwest China; ② Water resources system analysis and macro-control scheme research; ③ Study on the characteristics of water resources and its planning model; (4) Study on the simulation and prediction model of combined operation of surface water and groundwater in the inner basin; ⑤ Study on the coordinated development model of water and soil resources utilization and ecology in the inland river basin. In these five topics, taking the water resources system analysis and macro-control scheme research as the breakthrough point, taking the regional groundwater resources geographic information system as the data base, taking the water resources planning and the joint simulation and prediction model of surface water and groundwater as the technical means, comprehensively considering the needs of economic and social development and ecological environment protection, taking advantage of the characteristics of river-aquifer system in the inner basin and following the transformation law of surface water and groundwater, the dynamic planning model of water resources in the plain area of the basin is established, and the water resources regulation from the current water resources utilization state to the sustainable management state is put forward. Then, a coupled numerical model of surface water and groundwater in the plain area of the basin is established. Based on the changing process of water resources development and utilization and groundwater dynamic field in recent 30 years, the changing trend of groundwater system under different water resources development and utilization schemes is simulated and predicted. Through the demonstration of technical and economic feasibility and social acceptance of different schemes, the mode of rational development and efficient utilization of water and soil resources is put forward.
See figure 0. 1 for the overall technical route of the project, and figure 0.2 for the block diagram of the joint model for simulation and prediction of water resources regulation and control planning.
Figure 0. 1 Block diagram of overall technical route of the project
Fig. 0.2 Block diagram of joint model for simulation and prediction of water resources regulation planning.