How to make quicksand waterfall

The manufacturing method of quicksand waterfall is as follows:

First, empty the foam board in the middle, which is big enough to insert PVC pipes. ? The thick black line in the picture is PVC pipe. Drill two holes in the proper position of PVC pipe, and the foam board is the rock background board you will see in the physical picture below. As shown in the figure below, cut two small holes on the foam board, corresponding to the drilling holes of PVC pipes. Please note that the cross section of the lower hole is inclined.

Put a bowl (yellow part in the picture) at the exit below. This bowl is used to put white sand. The air pump pipe is connected to the bottom. After inflation, the air moves like bubbles in the picture, and the bubbles drive the water to move upward. The water pushes the white sand in the bowl to move, forming a waterfall effect.

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Located at the source of Jiulong River, Liusha Waterfall is the highest waterfall in China, with a height of 216m. In the rainy season, the rolling water flies from the cliff into the deep pool, just like the waves in Kowloon, puffing clouds, thundering and shaking the valley. Magnificent, magnificent. In the dry season, the water floats down from the cliff, sometimes like a gauze, sometimes like a bead curtain, just like a white gauze sweeping the green pool water, rippling layers of ripples, graceful, beautiful and elegant.

The quicksand waterfall can block water and sand, which will reduce the sediment concentration of the river. Vegetation can conserve water and soil, and the decrease of vegetation coverage leads to the increase of river sediment concentration. With the increase of precipitation intensity, surface erosion increases and river sediment concentration increases. Sand mining in the upper reaches of the river intensifies river erosion, leading to an increase in sediment concentration and a decrease in sediment concentration.