Research of Soil and Water Conservation Benefits from Forests Soil Erosion Control Measures in Red Soil Region of Southern China
The standard runoff plots at soil and water conservation station of Changting county was established and conducted continuous observations on the forest runoff and sediment yield of 3 kinds of different measures from 2007 to 2010 in order to study rainfall characteristics on different time scales and evaluate soil and water conservation benefits.The results showed that:(1)The rainfall was abundant but unevenly distributed during the year in the study area,which mainly concentrated in the flood season from April to August when rainfall accounted for 67.2％ of the annual rainfall and runoff and sediment loss were largest,rainfall in June was significantly higher than that in other months which accounted for 27.3％ of the annual rainfall,so soil and water conservation was important during the flood season.(2)The average annual runoff reduction rates of three control measures that stand fertilization improvement,closing the land for reforestation,artificial replanting were 47.9％,47.5％,44.2％ respectively,and the average annual sediment reduction rates of three control measures were 71.4％,67.8％,62.3％ respectively,the benefit of sediment reduction was 30.8％ higher than runoff reduction benefit,all the 3 different control measures had good benefits of runoff and sediment reduction,but the stand fertilization improvement measure was best.(3)Annual soil and water conservation benefits of different control measures increased year by year.
forest soil erosionrainfallrunoff and sediment yieldsoil and water conservation benefits
国家科技期刊平台
NSTL
万方数据
维普
