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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。
The multivariate stepwise regression analysis was used to analyze the response mechanism of annual sediment load to soil and water conservation in Helonglong interval from 1954 to 2013. The results show that the correlation coefficient of annual sediment yield response regression equation calculated in different periods reaches a high significance level of α of 0.001. With the improvement of water and soil conservation degree, The response sensitivity increased and the saliency increased. The effect of soil and water conservation on reducing the rainfall and sediment yield was obvious. With the improvement of soil and water conservation, the sensitivity of annual sediment load to the same rainfall condition decreased.