多波束测深系统是现代水下探测技术的研究热点，已广泛应用于水下检查的各个领域。介绍了其基本组成和特点，以多波束测深系统在河道砂石资源监测中的应用为研究对象，探讨了区域河段内采砂量监测的技术方法和数据处理过程。结果证明采用此项技术可以对河道砂石资源开采量进行监控，对采砂监管工作有一定的借鉴意义。

 Multibeam sounding system is a modern underwater detection technology which has been widely used in the fields of underwater detection. We present the working principle and  characteristics of this system and introduce its application to the monitoring of river sand resources. We also discuss its techniques and data processing process, and calculate the quantity of river sand mining. Through case study in a sand mining segment in the Yangtze River basin, we demonstrated the effectiveness and reliability of applying this system to the quantitative monitoring of regional sand mining.