CAJ | 학술논문

利用ADCP底跟踪技术遥测了长江河口北港段推移质运动过程，并对推移质运动状态进行了分段研究。结果表明：无推移质运动状态下，测量误差主要受近底悬沙影响，推移质流速沿水流方向被高估；部分推移质运动状态下，推移质运动视速度与垂线平均流速呈指数相关；普遍推移质运动状态下，两者线性相关显著，且推移质运动速度误差将随流速变化而改变，测量精度主要受脉冲长度和近底悬沙影响。基于ADCP测量数据的推移质单宽输沙率公式合理有效，可以用于河口推移质输沙率的快速定量。
이용ADCP저근종기술요측료장강하구북항단추이질운동과정，병대추이질운동상태진행료분단연구。결과표명：무추이질운동상태하，측량오차주요수근저현사영향，추이질류속연수류방향피고고；부분추이질운동상태하，추이질운동시속도여수선평균류속정지수상관；보편추이질운동상태하，량자선성상관현저，차추이질운동속도오차장수류속변화이개변，측량정도주요수맥충장도화근저현사영향。기우ADCP측량수거적추이질단관수사솔공식합리유효，가이용우하구추이질수사솔적쾌속정량。
ADCP was used to measure the bed load transport process in Beigang Channel of Yantze River estuary and the bed load transport status in different stages was studied. The results show that if there is no bed load transport, the measuring error was influenced by suspended load near bed and the movement velocity of bed load in the flow direction is over estimated;if there is partial bed load transport, the apparent velocity of bed load has exponential correlation with mean velocity in vertical;if there is much bed load transport, the apparent velocity of bed load and mean velocity in vertical is in obvious linear correlation, and the error of apparent velocity varies with flow velocity. However, the measurement accuracy is mainly affected by the pulse range and the near-bottom suspended sediment. The formula of bed load transport rate per unit width measured by ADCP is reasona-ble, which can be used to rapidly determine the bed load transport rate in Yantze River estuary.