摘要
通过在长汀水土保持科教园建立标准径流小区,2007-2010年连续观测3种不同措施下林地的产流和产沙情况,研究南方红壤区降雨量在不同时间尺度上的变化特征,并评估不同治理措施的水土保持效益。研究结果表明:(1)研究区降雨充沛,年内分配不均,主要集中在汛期4-8月,汛期降雨量占到年均降雨量的67.2%,是年内径流泥沙损失最多的时期,其中,6月份的降雨量显著高于其他月份,占全年降雨量的27.3%,应注重进行水土保持;(2)林地施肥改良、封育、人工补植3种控制措施的年均减流率分别为47.9%,47.5%,44.2%,年均减沙率分别为71.4%,67.8%,62.3%,减沙效益比减流效益高30.8%,3种控制措施均具有较好的减流减沙效益,但以林地施肥改良措施的减流减沙效益最好;(3)不同控制措施的年际水土保持效益逐年增加。
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 3kinds of different measures from 2007 to 2010in 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 3different 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.
出处
《水土保持学报》
CSCD
北大核心
2014年第5期1-5,共5页
Journal of Soil and Water Conservation
基金
国家科技支撑计划项目(2012BAC09B03)
农业科技成果转化资金项目(2013GB24320619)
关键词
林下土壤侵蚀
降雨量
产流产沙量
水土保持效益
forest soil erosion
rainfall
runoff and sediment yield
soil and water conservation benefits
