用γ光测量含沙量的方法

The way of determining content of sand by making use of γ radiation

河流含沙量的测量是获取水文资料的重要环节之一,众多科学家多年来为实时测量含沙量,研究过多种方法和手段,然而由于各种原因,目前仍大量使用由现场取样送入实验室测量的方法.在研究以往采用过的各种含沙量测定技术和装置,比较其优缺点,查阅大量相关资料后提出采用铯137γ光测含沙量是更好的方法.目前采用小剂量铯137γ光线的仪器,在工程建设中已广泛应用,安全可靠;利用γ光衰减原理测量含沙量,测量精度高,不受泥沙颗粒,泥浆浓度,河流漂浮物等影响,设备易于保护,适合现场实时测量.

It is very important to determine the content of sand in rivers or lakes in order to get hydrological data. For many years, scientists have tried to determine the content of sand on the spot in all sorts of ways. So far, it always occurred that the specimen on-the-spot is sent to test. It＇s the better way that the content of sand is determined with 137Csγ radiation. The idea is got by the applied technology and the instruments that are used to determine the content of sand, by comparing with their strong and weak points and by consulting technical data. Up to now, the instruments that utilizes the 137Csγ radiation have been widely applied on the engineering construction. It is high precision, safety and not affected by silt granular,by slurry density, and by flout on the rives or lakes by making use of the principle of weakened radiation. The notable advantage is that the determination of sand content can be done on the spot.