Could Yellow River get clear? when? the key to answer the questionis that whether the rainfall can permeat into the soil layer or not, theinfiltrating amount and the time. The study result shows that the watertransparency of Yellow River is positively related to the infiltrating rate.The measures to increase soil permeability are those, i. e., to change soiltexture, to decrease soil bulk density, to improve soil structure andincrease the cover rate of surface soil, especially the leguminous foragegrass planted have better effect.Various kind of soil conservation measuresare aimed at increasing soil permeability, decreasing soil loss mostly.When the surface runoff becomes trickling flows Yellow River will be solimpid that you can see to the bottom.