2015 年 21 巻 1 号 p. 23-28
The objective of this study is to evaluate absorptive abilities of nitrogen and phosphorus by natural material for slope protection. Hedge bamboo (Bambusa multiplex) was introduced as a test material in this study. To quantify the absorbed nitrogen and phosphorus by hedge bamboo, logistic model described as a function of cumulative temperature was introduced. Water tank experiments with high and low concentration water were performed to optimize the parameters of this model. The experimental results indicated that the absorptive abilities of nitrogen and phosphorus by hedge bamboo changed with time and initial concentration. Using the experimental data, the parameters of logistic model were identified. The calculated absorption of nitrogen and phosphorus had good agreement with the measured data. The changes of absorbed nitrogen and phosphorus could be predicted using this model.
