2018 年 28 巻 S 号 p. 185-188
Rising atmospheric CO2 concentrations may lead to various problems, such as abnormal weather, rising sea level, decreasing food production and so on. In order to address these problems, carbon sequestration programs, including afforestation and reforestation are gaining attention globally and research activities have been conducted all over the world. There are some requirements in carbon sequestration by large-scale afforestation, and only arid land meets this requirement. However, afforestation of arid land is difficult due to a little amount of precipitation. To establish efficient afforestation plan, it is necessary not only to understand movement of water for tree growth but also to assess the impact of the afforestation on the water movement and periphery vegetation. In the present study, we applied the numerical runoff model so far developed to simulate water movement in arid land to the model site area (annual rainfall 215 mm) near Leonora in Western Australia, where we have planted trees for demonstration of afforestation. Some simulations were carried out under several rainfall patterns and water movement was visualized for better understanding of afforestation impact and efficiency.
