摘要
Cs-137系全球分布的一种人工放射性核素,自大气沉降至地表后立即被土壤胶体颗粒强烈吸附,并主要是伴随着土壤颗粒的机械运动而迁移,根据Cs-137在土壤剖面中的分布规律便可判断采样点是受侵蚀还是沉积。水土流失背景值的测定是开发建设项目水土保持工作中的重要内容,水土流失预测是编制开发建设项目水土保持方案中的重要依据,也是水土保持监测中的一项重要内容。以宁波市周公宅水库水土保持监测为例,探讨Cs-137在开发建设项目水土流失背景值监测中的应用。
Cs- 137 is an induced- activity nuclide spread all over the world. It can be immediately absorbed by soil colloid particles after the nuclide lowers down to the surface from the atmosphere, which can be moved accompanying with the mechanical movement of soil particles. It is judged that the sampling points are eroded or deposited based on the distributed rule of Cs- 137 in soil profile. The measurement of soil and water loss background values is an important aspect of soil and water conservation work for engineering construction items, which is an important basis of estabLishing soil and water conservation schemes and also a main content of soil and water conservation monitoring. Regarding soil and water conservation monitoring of Zhougongzai Reservoir in Ningbo as an example, the application of Cs - 137 to monitoring background value of soil and water loss is discussed in the paper.
出处
《浙江水利科技》
2008年第3期22-23,26,共3页
Zhejiang Hydrotechnics
基金
浙江省科技厅资助项目(计划编号2005F12030)
关键词
CS-137
水土流失
背景值
监测
Cs- 137
soil and water loss
background value
monitoring
