## 4 Results
### Types and Characteristics of Sedimentary Environment
#### 4.1.1 Lake Sedimentary Environment  
The lake sedimentary environment of the Ebinur Lake Basin is mainly developed in the current Ebinur Lake area and its surroundings. The geographical location belongs to Tuotuo Township and Mangding Township in Jinghe County. It is formed by the confluence of various rivers and groundwater on the surface of the basin. The lake's sedimentary environment area is 1906 km\({}^{2}\). The lake sedimentary system, delta deposition,  
Figure 2: Satellite image data measurement method, 2024. (The basic map comes from Google Earth and Global Mapper elevation imagery. (**a**) Preliminary sketch in Global mapper; (**b**) Import into Google Earth. (**c**) Boundaries are determined by the lowest point of elevation; (**d**) Dune measurement morphological data. (**e**) Desert cross-sectional division.).  
shore deposition, and shallow lake deposition are developed in the lake sedimentary environment area of Ebinur Lake.  
The delta mainly includes the Bo River Delta (Figure 3a), the Jing River Delta (Figure 3b), the Kuitun River Delta, and a small river delta in the southeast. Through satellite images and field reconnaissance, it was proved that there are a large number of branch channels in the Bortala River and Jinghe River Delta. The sediments are mainly sandy, argillaceous, with a small amount of fine gravel sandy, and the interchannels are mainly argillaceous deposits. Affected by the arid climate and production from living water, a large number of branch channels in the Bortala River Delta have dried up (Figure 3c), and only the Jinghe River Delta still has river water flow (Figure 3d), providing water for Ebinur Lake.  
The shore deposits include the lake beach area at the edge of the current lake area of Ebinur Lake. The signs of multiple changes in the lake shoreline can be observed in the field (Figure 4). Regions I, II, and III are the latest three lake shoreline changes of Ebinur Lake. Region IV is the current location of the lake water of Ebinur Lake. Region I is the location of the lake shoreline during the flood period of Ebinur Lake, which is the highest lake shoreline currently visible. The sediments are mainly mud and silt, and the overall color is yellowish brown. Region II is the lake shoreline of Ebinur Lake in the normal water period. The main sediments are yellowish-brown silt. Due to the extremely high degree of salinization of the Ebinur Lake water and the very dry climate, a large number of white salt layers and mud cracks can be seen in the dry lake beach.  
Figure 3: Satellite images and field reconnaissance of the Bortala River and Jinghe River Delta, 2024. (**a**). Bortala River Delta; (**b**). Jinghe Delta; (**c**). Bortala River Delta 1 area field aerial photography (2023); (**d**). Jing River Delta 2 area field aerial photography (2023). Figures (**a,b**) were created on google earth imagery; Figures (**c,d**) are aerial photographs of the field (2023).  
The water surface of Ebinur Lake is shallow lake sediments. The average water depth of Ebinur Lake is 1-2 m, and the lake area is about 480 km\({}^{2}\). Under the images of arid climate and artificial water diversion and irrigation, the water source flowing into Ebinur Lake has been greatly reduced, the lake has been in a dry period for a long time, and the surface area of the lake has been reduced to area IV (Figure 4). During the evolution and development of Ebinur Lake, a large number of mineral ions were brought into the lake by the rivers and drainage channels. The salt has evaporated and concentrated on the lake surface and exists in the lake water with the rivers and drainage channels, which makes the salt content of the lake water increase continuously. Therefore, there are mainly high-salt muddy shallow lake sediments.