A STUDY ON EFFECTS OF GROUND COVER ON RUNOFF CHARACTERISTICS

摘要

The total runoff coefficient in Treatment Ⅰ, Ⅱ, Ⅲ is 68.85%, 80.39% and 76.49% respectively, in which surface runoff coefficient is 1.35%, 2.78% and 32.74% whereas underground runoff coefficient is 67.50%, 77.61% and 43.75% respectively. And the total evapotranspiration coefficient in Treatment Ⅰ,Ⅱ, Ⅲ is 31.15%, 19.61% and 23.51% respectively. As is known above, the runoff coefficient in Treatment I is the least, while its evapotranspiration coefficient is the most. Therefore, the fact is illustrated that Bahia grass must be cut to mulch in the season of high temperature. The aims can be attained of decreasing surface runoff, Bahia grass' transpiration and bare land surface' evaporation.