1. Study the treatment of saline-alkali land in Xi 'an possibly flooded area and reservoir area. Therefore,1:50,000 supplementary engineering geological surveying and mapping was carried out in Weihe section of the reservoir area, and groundwater dynamic observation profiles and observation wells were added;
2. Engineering geological investigation of sand bar construction in bedrock valley of Nanshan tributary at the northern foot of Qinling Mountains:
3. Investigation of bank collapse in the reservoir area, and engineering geological study of bank collapse east of Tongguan.
The project planned in the reservoir area has achieved the expected effect.
1970, 1 1 In June, according to the requirements of the State Planning Commission (70) No.69, the fifth brigade and the eighth brigade of hydrogeology and engineering geology in Shaanxi Province were merged and decentralized to the province, and renamed as the second hydrogeology and engineering geology team of Shaanxi Geological Bureau. "The team will be stationed in Weinan. In addition to the tasks in Shaanxi Province, it will continue to undertake hydrogeological projects in the Yellow River Basin. The merger meeting of the two teams decided to set up the fifth team to undertake the geological project of harnessing the Yellow River. Yi Jun, the first secretary of the Second Hydrogeological Team, is in charge of technology, Xin Kuide, and his successors are Tang Jinbang, Jia Xin 'an, Liu Guangrun, Dai Yingsheng and Geng Henian. The fifth team (also known as the Yellow River Geological Team) is in charge of technology, including Ge Qingyun, Qu.
After the completion of the original work plan of the Fifth Brigade, before the preparation of the new work plan of 1972, the Fifth Brigade summarized and evaluated the research degree of geological disasters since the operation of Sanmenxia Reservoir and the geological research degree of soil erosion and soil and water conservation in the loess area, established working contacts with the Huangwei Committee, Shaanxi Soil and Water Conservation Bureau and other units, and conducted reconnaissance and data collection for the future work area. At that time, the reconstruction project of Sanmenxia Water Control Project was about to be completed. Before the "annual control operation" began, the Second Hydrogeological Team compiled the Summary of Hydrogeological Engineering Geology Work for Harnessing the Yellow River since the completion of Sanmenxia Reservoir and the Preliminary Plan for Future Work in May 1973.
This plan has been implemented for four years. By the end of 1977, on the basis of further supplementing and adjusting the groundwater observation network, the reservoir area has made progress in groundwater dynamic analysis and immersion prediction method research, saline-alkali land control research, and engineering geological mapping and investigation of Nanshan tributary regulation.
At the beginning of 1978, the Second Hydrogeological Team submitted a proposal on the General Plan for Harnessing the Yellow River Geology to the State Geological Bureau and Shaanxi Geological Bureau, which was approved by the State Geological Bureau. These two tasks are:
First of all, write a summary report on engineering geological problems during the operation period of Sanmenxia Reservoir. In the observation and research of geological disasters in Sanmenxia Reservoir in recent 20 years, it is logical to systematically analyze and demonstrate the geological disasters in Sanmenxia Reservoir under the condition of controlling and utilizing the low water level all the year round in recent 5 years, which is a phased summary of the geological work of water conservancy projects in Sanmenxia and the Yellow River in the future.
The second is to study the regional engineering geological problems in the middle reaches of the Yellow River.
198 1 year, forming the first draft of the above two geological achievements in harnessing the Yellow River. Zhang, Jia Fuhai and other leading comrades, when reporting to the Department of Hydrogeology of the Ministry, requested that the regional engineering geological achievements in the middle reaches of the Yellow River be written into a monograph for official publication. 1982, Shaanxi Provincial Bureau of Geology and Mineral Resources passed two results in the first instance. 1in March, 983, in Xi' an, the Department of Hydrogeology of the Ministry of Geology and Mineral Resources presided over a review meeting, and invited 48 representatives from 30 units including relevant ministries, research and teaching departments, geological bureau of the middle reaches of the Yellow River and hydropower departments to carefully review the two reports. The Report on Engineering Geology of Sanmenxia Reservoir in the Operation Stage of the Yellow River was published in1983 65438+February, and the Regional Engineering Geology of the Middle Yellow River was published in1986 65438+1October.