摘要
以黄土丘陵沟壑区安家沟流域坡沟系统作为研究对象,采用多元线性回归与单因素方差分析了植被类型、坡度、降水平均强度、降水历时等因子对径流量与产沙量的影响。结果表明:不同植被类型条件下坡面径流量、产沙量的组间F检验值分别为3.873,3.930,均在0.05水平下差异显著;不同坡度的坡面径流量与产沙量的F检验值均大于1,径流量与产沙量均值存在差异;不同植被类型条件下径流量与产沙量的泊松相关系数R值均高于0.6(Sig.=0.00),二者存在显著相关关系,产沙量随径流量的增加而增加;不同植被类型下各影响因子与产沙量多元回归拟合度的R2均较高,说明各类因素可以较好地解释产沙量的变化,尤其天然草地相关性最大,R2值达到0.95并在0.05水平下显著。研究结果为黄土高原水土流失治理提供了一定理论参考。
Taking Anjiagou river basin in the loess hilly-gully region as a case subject,and by using multiple linear regression and one-way ANOVA,multiple variables including vegetation,slope gradient,mean precipitation intensity,precipitation duration that have influence on slope runoff and sediment yield are analyzed. The results show that：（1）with different vegetation types,F-value of interclass variance between slope runoff and sediment yield are 3. 873 and 3. 930,which is statistically significant under 5% significance level; with different slope gradients,their F-values are greater than 1,revealing un-corresponding relation between slope runoff and sediment yield;（2）square of correlation coefficient（ R2） between runoff and sediment yield are greater than 0. 6（ Sig. = 0. 00） with various vegetation types,showing that the two variables are highly correlated,sediment yield increase with the increase in the slope runoff; high R2 indicates that the change in the sediment yield can be well explained by the multiple linear regression model. Natural grassland is highly correlated with the change in sediment yield with the R2 equals to0. 95,and is significant under 5% significance level.
出处
《人民长江》
北大核心
2018年第3期36-40,共5页
Yangtze River
关键词
径流量
产沙量
植被类型
黄土丘陵沟壑区
安家沟流域
runoff
sediment yield
vegetation types
loess hilly- gully region
Anjiagou river basin
