What's the name of this lake? Why is the lake so clear? Are there any creatures in it? How deep is it?

From the analysis of lake bottom sediments, it is still very shallow ~ 1. The coarse gravel deposited at the bottom of the lake is poorly rounded, which means that the debris near the shore can quickly enter the lake without sufficient handling and rounding process. 2. The lake is clear because there is very little suspended matter of terrigenous debris in the water, which means there is a lack of terrigenous water supply. 3. From the above two, we can draw a third conclusion: the surface of the fan delta that may directly enter the lake may only develop on the shore. There are intermittent currents or small braided river deltas. The shooting location is very close to the delta. The water body is very shallow, and the water depth in the shallow lake area is only two or three meters. ...........................................................................................................................