Application Research of Radar Level Gauges in Hydrological Stations in Xinjiang

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Central theme: In the context of large-scale socialized production, water resources are essential for both people’s daily lives and the production activities of industrial enterprises. Although the western region is the source of many rivers, the rugged terrain makes it difficult to supply water resources there. Without proper water management projects, this can even affect the water supply in the eastern and central regions. In recent years, Xinjiang has developed radar level gauges; through continuous research and field observations, they were finally put into production. 65465465.jpg 0 Introduction Since the beginning of the 21st century, China’s economic level has been gradually improving. The development of the Chinese economy relies on the primary sector (agriculture), the secondary sector (industry), and the tertiary sector (services). Among these, information technology is applied most extensively in the tertiary sector, where it also accounts for the largest proportion. The integration of technology has greatly saved labor and resources, reduced production costs, and thus contributed to a continuous improvement in the economic level. Currently, the hydrological stations established by China in its western regions incorporate cutting-edge technologies of the information age, with new radar level gauges being applied in the hydrological stations in Xinjiang. A radar level gauge is an advanced device for automatically measuring, collecting, and storing water level data. By processing and calculating the water level data obtained by this gauge and comparing it with manually recorded observations, it is possible to determine whether the instrument is suitable for the climatic conditions and surrounding environment of hydrological stations in Xinjiang, as well as to check whether its accuracy meets the specified standards. This provides a basis for using such instruments as standard measurement tools in the future, and it also serves as a reference for the automated development of hydrological information databases. Drawing on years of practical experience, the author analyzes the application of radar level gauges in hydrological stations in Xinjiang for reference only. 1 Overview of Hydrological Stations in Xinjiang 1.1 General Geographic Location In China, there are mainly two types of basins: those formed by tectonic movements in the Earth’s crust, known as “tectonic basins,” such as the Turpan Basin in Xinjiang and the plain basins in the Jianghan region ； Another type is the basins formed by glacial, fluvial, wind, and karst erosion, known as \"erosional basins\"; for example, the Jinghong Basin in Xishuangbanna, Yunnan, was primarily formed through erosion and expansion by the Lancang River and its tributaries. The Tuyun Basin in the Tarim Region of Xinjiang is a wind-eroded basin; in the northwest region, most basins are formed as a result of tectonic movements. At the same time, the Tuyun Basin is also a sedimentary basin; it can accept sediments transported from source areas, as well as volcanic ejecta from relatively nearby sources, and of course it can also accommodate basin-derived sediments formed through in-situ chemical, biological, and mechanical processes. However, apart from the basins distributed in various regions, the northwestern area is mostly composed of plateaus and mountains, with complex terrain, which poses great difficulties in selecting locations for hydrological stations in Xinjiang. 1.2 Overview of Topography, Landforms, Soil, and Vegetation: Xinjiang is located in the western part of China. Influenced by topography, landforms, as well as wind and river erosion, the terrain in Xinjiang consists mainly of plateaus, mountains, and basins. However, the soil quality in Xinjiang is not very good, and coupled with the impact of abnormal temperatures and other meteorological factors, the soil surface is particularly prone to damage. Due to the low fertility of the soils in Xinjiang and their susceptibility to degradation, the vegetation coverage is very low. Deserts and wastelands are common in the western region, while areas with lush vegetation are rare. 1.3 Overview of River Systems The rivers in Xinjiang region originate on the northern slopes of the Kunlun Mountains to the south; from their sources to their points of disappearance at the mouths of the rivers, the elevation generally decreases from south to north. The river course is winding, with many canyons; the flow is rapid and the gradient on the river bottom is steep. The riverbed material in mountainous areas is mainly composed of larger gravel, while that in plain areas is primarily made up of fine sand, with significant fluctuations due to erosion and deposition. From the perspective of river systems, Xinjiang is the source of many rivers; however, due to the influence of terrain, topography, and wind forces, rivers in areas with gentle slopes generally have a high sediment content. The use of radar level gauges in hydrological stations in Xinjiang can effectively avoid these problems, ensuring a supply of water resources for the Xinjiang region as well as the central and eastern regions. 1.4 Meteorological Overview Generally speaking, meteorological changes in the Xinjiang region are greatly influenced by the terrain and topography. Xinjiang has a complex terrain, and coupled with the strong winds coming from the Russian mountains, the climate can change rapidly within a single day. At the same time, due to strong winds, the topsoil is blown away or washed away by rivers, resulting in low fertility of the soils in Xinjiang. The overall ecological environment in Xinjiang is relatively fragile and difficult to protect; once damaged, it is hard to restore. 2 Prerequisites for the Application of Radar Level Gauges at Xinjiang Hydrological Stations 2.1 Collection of Basic Data From October 24 to 25, 2010, the Xinjiang Geological Exploration Team conducted measurements at the flood survey sections of the sites for Xinjiang Hydrological Stations, as well as measurements of the water volume in the rivers at that time. They also investigated rainfall conditions and collected flood survey data from Xinjiang Hydrological Stations from October 1999 to October 2002, along with hydrological data obtained from specialized stations in 2008. The collection of these basic data laid the foundation for the application of radar level gauges at hydrological stations in Xinjiang. 2.2 Geological environment research: Adequate preparation is required before applying radar level gauges to hydrological stations in Xinjiang, especially an understanding of the development status of underground mineral resources. Since China’s underground mineral resources are concentrated in remote and geographically complex areas in the west, it takes considerable time to study the topographical and geological conditions, so as to carry out exploitation without damaging the fragile ecological environment or causing disruptions to people’s lives. This poses a great challenge for geoscientists. To this end, thorough research must be conducted when establishing hydrological stations, advanced technologies must be mastered, and adequate preparations must be made. The complexity of the geology in Xinjiang poses many difficulties for the use of radar level gauges. To utilize them effectively, it is necessary to master the relevant technologies in advance and develop emergency plans. 2.3 Field investigations As early as 2011, several geological survey teams from China conducted field investigations at the hydrological stations in Xinjiang. Due to the relatively fragile local ecosystem, extra care must be taken during exploration, and attention must be paid to ensuring that the advanced technologies used do not damage the surface of the ground, in order to avoid adverse effects on the environment. With the support of the “Xinjiang Geological Exploration Fund Project,” in the second half of 2011, the exploration team decided to conduct in-depth investigations of the hydrological stations and drilled boreholes in that area ； In the following years, the survey team continued to conduct exploratory research on the hydrological stations, achieving some unexpected results. At the same time, they carried out more in-depth studies of the surface topography and geology, which provided a clear direction for the application of radar level gauges in hydrological stations in Xinjiang. During the field investigation, the survey team conducted in-depth studies on some complex geological formations. The establishment of hydrological stations in Xinjiang must avoid certain plateau and mountainous areas, as well as regions with large topographical variations; therefore, the basin areas in Xinjiang are more suitable for setting up hydrological stations. Through continuous exploration and successive layers of analysis and screening, the survey team was able to identify a relatively suitable general location for establishing hydrological stations in Xinjiang. 3 Analysis of the specific application scenarios of radar level gauges. The overall performance of radar level gauges in hydrological stations in Xinjiang is very good. With continuous technological advancements, their effectiveness in these stations has become even greater. Radar level gauges can effectively remove impurities from water, thereby ensuring the safety of water supply for residents. In addition, the use of radar level gauges at hydrological stations in Xinjiang can enable more efficient utilization of water resources, facilitating industrial production in certain areas. However, the use of radar level gauges in hydrological stations in Xinjiang also presents some problems; for instance, since these stations supply water resources with high efficiency and high purity, it is inevitable that there will be waste of such water resources ； Another example is that the local ecological environment is fragile and prone to damage; once it is damaged as a result of the use of radar level gauges, it will be difficult to restore. Therefore, in practical applications, strict management systems must be established to address the issues of water resource waste and ecological environment damage. 4 Application Principles and Advantages of Radar Level Gauges 4.1 Application Principles of Radar Level Gauges With the continuous improvement of the socio-economic level, information technology has also been widely applied in contemporary society. In recent years, thanks to the continuous efforts of geographers, new radar level gauges have been developed, and their performance in hydrological stations has improved significantly compared to before. Here is a brief introduction to the working principle of radar level gauges: A radar level gauge is a high-precision, contactless device for measuring water levels. It works by emitting high-frequency radar waves at the water surface and receiving the waves reflected back, thereby determining the distance to the water surface. Since it does not make contact with the water surface, it is not affected by turbid water, sludge, aquatic plants, etc. Moreover, it is easy to install – no observation wells are required; only a cantilever needs to be installed. The use of radar level gauges at hydrological stations in Xinjiang not only contributes to ensuring safe water supply for local residents but also plays a role in protecting water resources. 4.2 Advantages of radar level gauges in application Radar level gauges have demonstrated very significant overall performance in hydrological stations in Xinjiang. Before the use of radar level gauges, it was difficult to ensure the cleanliness of water resources, and the investment costs for hydrological stations were relatively high ； By using radar level gauges, it is possible to ensure the quality of water resources provided by hydrological stations, while also reducing the need for significant labor input; this lowers the application costs and improves economic efficiency. 5 Conclusion The application of radar level gauges in hydrological stations in Xinjiang was analyzed from four aspects: a) An analysis was conducted on the overall topographical characteristics of the Xinjiang region ； b) The preparatory work required before the application of radar level gauges was discussed, and it was concluded that only by making adequate preparations can the effective use of radar level gauges in Xinjiang’s hydrological stations be ensured ； c) Analyzed the specific application of radar level gauges in hydrological stations in Xinjiang ； d) By analyzing the application principles and advantages of radar level gauges, a more comprehensive understanding was gained of their use in hydrological stations in Xinjiang. Furthermore, to ensure that the hydrological stations in Xinjiang can provide sufficient water resources, it is necessary to strengthen the development of relevant management systems and protection measures in future work. Only in this way can the safety of residents’ water supply be better ensured.