Some kinds of fish will keep lakes and water-ways clear by eating water weeds. the Chinese grass carp is one. it eats large amounts of water milfoil and other weeds that grow under the water surface.

On the basis of oil source correlation, the paper studied the organic microscopic component of the immature hydrocarbon source rock in santanghu basin.

The stabilization pond-plant bed composite system was used for treatment of farmland irrigation and drainage water, in the plant bed, Zizania caduciflora and Phragites austrails were planted.