简单屋顶绿化降雨产流时间研究

发布时间：2018-08-11 08:32

【摘要】：通过室内模拟人工降雨试验,研究了降雨强度、叶面积指数、基质厚度、初始含水率对简单屋顶绿化延迟产流时间的影响。试验结果表明,对于简单屋顶绿化,其延迟产流时间主要受降雨强度和叶面积指数的影响:随着降雨强度的增加,延迟产流时间逐渐缩短;随着叶面积指数的增大,延迟产流时间逐渐增长。试验中还发现草炭含量的增加能增强基材的持水性能,而煤渣含量的增加会削弱基材的持水性,陶粒含量过多不利于植物生长。最后,利用多元线性回归分析得到了关于延迟产流时间的计算模型,其对于预测简单屋顶绿化产流时间具有较好的参考价值。
[Abstract]:The effects of rainfall intensity, leaf area index, substrate thickness and initial moisture content on the delayed runoff production time of simple roof greening were studied by artificial rainfall simulation. The results show that for simple roof greening, the delayed runoff time is mainly affected by rainfall intensity and leaf area index: with the increase of rainfall intensity, the delay runoff time decreases gradually, and the leaf area index increases. The time of delayed runoff gradually increased. It was also found that the increase of peat content can enhance the water holding capacity of the substrate, while the increase of cinder content will weaken the water holding capacity of the substrate, and the excessive content of ceramsite is not conducive to plant growth. Finally, by using multiple linear regression analysis, the calculation model of delayed runoff production time is obtained, which has a good reference value for predicting the runoff production time of simple roof greening.
【作者单位】：三峡地区地质灾害与生态环境湖北省协同创新中心;
【基金】：国家自然科学基金(51178251)
【分类号】：TU992;TU985.12

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