γ透射法测量土壤含水量的层间分辨率实验研究  

Experimental study on spatial resolution of soil water content measured by γ-ray attenuation method

作　　者：王文焰[1] 张建丰[1] 汪志荣[1] 

机构地区：[1]西安理工大学水资源研究所,陕西西安710048

出　　处：《水利学报》2004年第8期85-89,共5页Journal of Hydraulic Engineering

摘　　要：室内的系统实验研究表明,采用γ透射法测量土壤含水量时,在探头的前端设置铅屏蔽罩对提高层间分辨率及测量精度极为有效。铅屏蔽罩厚度0～23 5mm及准直孔径4～12mm的组合试验资料分析表明,铅屏蔽罩厚度为4～10mm,准直孔径为10mm左右即可在满足测量精度不低于3%的前提下层间分辨率达到22mm。The effects of thickness and collimator diameter of the lead probe shield on spatial resolution of soil water content measured by γ-ray attenuation method was studied experimentally.The result shows that the resolution is 22mm with measurement error smaller than 3% when thickness of lead shield is 4～10mm and collimator diameter is 10mm.

关 键 词：Γ透射法 土壤含水量 分辨率 精度 

分 类 号：S152.7[农业科学—土壤学]