黄河河龙区间年输沙量对水土保持的响应机理研究

Study on response mechanism of annual sediment transport to soil and water conservation in He-Long reach of the Yellow River

采用多元逐步回归分析方法,分析研究1954-2013年河龙区间年输沙量对水土保持的响应机理。结果表明,不同时段计算得出的年输沙量响应回归方程相关系数均达到α为0.001的高显著性水平,随水土保持治理度的提高,河龙区间年输沙量对水土保持治理度的响应敏感性增加,显著程度提高;水土保持治理对减少高降雨产沙的效果明显;随着水土保持治理度的提高,河龙区间年输沙量对相同降雨条件响应的敏感程度减弱。

Multivariate stepwise regression analysis method is adopted to study He-Long reach sediment response mechanism of soil and water conservation from 1954 to 2013. Results show that： 1） The correlation coefficient of regression equation of sediment transport response in calculation of all different periods reached high significant at α = 0. 001 level. With the increase of the degree of soil and water conservation governance,the sensitivity of annual sediment discharge in response in He-Long reach was increased for the degree of soil and water conservation governance,and increased significantly. 2） The effect of soil and water conservation treatment on reducing high rainfall sediment yield was obvious. 3） With the increase of the degree of soil and water conservation governance,the sensitivity of annual sediment discharge to the same rainfall condition was decreased in the He-Long reach.