By utilizing the data of integrated data of a variety of land-surface physical quantities observed at the Semi-Arid Climate and Environment Observatory of Lanzhou University(SACOL) from Nov.2008 to Oct.2009,the annual and daily variation characteristics of soil temperature,soil moisture,precipitation,surface albedo,surface radiation components and energy balance components are systematically analyzed.As well as,the relationship between surface albedo and soil moisture,also and precipitation are researched.T...