摘要
首次尝试采用 γ射线透射法测量土壤侵蚀径流中的含沙量。用两种不同土壤 (黄绵土、粘土 )、三种含沙量增量 (3%、5 %、10 % )和三种测量时间 (6 s、10 s、2 0 s)进行了含沙量测量实验 ,以验证用 γ射线测量泥沙含量的可行性、确定泥沙含量对 γ射线的响应特性。并推导了根据 γ射线透射强度计算含沙量的理论计算公式。将实验结果与理论计算值进行对比 ,以检验理论计算的准确性和测量实验与理论计算的一致性。结果表明 ,γ射线透射通过泥沙溶液的强度与水流含沙量间有极度显著的线性相关关系 ,并与理论计算结果高度一致 ,表明可由 γ射线透射强度稳定、可靠。
An attempt was made to use gamma ray transmission method to measure sediment concentration in runoff. Two types of soils (silt loess and clay loess), three increments of sediment concentration (3%, 5% and 10%) and 3 sampling periods (6 s, 10 s, 20 s) were adopted for sediment measuring experiments, so as to validate the feasibilities of measuring sediment concentration with gamma ray method and to determine the response of measured sediment concentration to different conditions. The theoretical algorithm was derived for determining sediment concentration with gamma ray method. A simple relation of sediment concentration with gamma ray readings was statistically given. Experimental data were used to verify the correctness of the theoretical equation and to check the consistency of the theoretical results with those from experiments. Results showed very good linear relationship between sediment concentrations and gamma ray readings, as well as very good consistency between measured sediment concentrations and the theoretically computed values. The gamma ray method can be used to determine sediment concentrations steadily, reliablly and precisely.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2002年第1期18-21,共4页
Transactions of the Chinese Society of Agricultural Engineering
基金
中国科学院"百人计划"项目
中以合作项目99w-0 0 2 14 2 2共同资助
关键词
含沙量
测定
γ射线透射法
径流
透射强度
测量时间
算法
土壤侵蚀
sediment concentration measurement
penetration method by gamma ray
runoff
penetration intensity
sampling period
