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首页> 外文期刊>Estuarine Coastal and Shelf Science >Measuring discharge in a river with tidal bores by use of the coastal acoustic tomography system
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Measuring discharge in a river with tidal bores by use of the coastal acoustic tomography system

机译：使用沿海声学层析成像系统测量潮汐河流中的流量

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摘要

Eleven repeat reciprocal sound transmission experiments for current measurements were successful carried out from April 2009 to May 2010 in the Qiantang River, China. Ubiquitous are tidal bore intrusions that occur during spring tides in Hangzhou Bay. The experimental site is about 90 km away from the mouth of Hangzhou Bay. The coastal acoustic tomography (CAT) system consisted of two acoustic transceiver units, one on each side of the river, separated by 3050 m. During the sound transmission experiments, 42 shipboard acoustic Doppler profiler (ADP) surveys were also performed along the sound transmission line to obtain validation data for reciprocal sound transmission data. The average current along the vertical section, determined from the travel time difference between the reciprocal data, was in excellent agreement with the ADP results, with a root-mean-square difference of 0.04 m s~(-1). The sudden variations in river discharge caused by the passage of tidal bores were captured well by the CAT. The river discharge (Qcat) measured by CAT had a mean value of 2170 m3 s~(-1) but varied between -9097 m~3 s~(-1) and 7985 m3 s~(-1) during the bore events. For the periods with no tidal bores, the water level data were well correlated with the steady river discharges estimated from the CAT data. By using the empirical relationship between these two variables, the annual river discharge (Qwl) was predicted in the range from 914 m3 s~(-1) to 11,982 m~3 S~(-1), with a mean of 2737 m~3 s~(-1). A comprehensive discussion of the potential sources of error is presented. The resultant Qwl error (621 m~3 s~(-1)) is small compared with the range of Qwl (11,068 m~3 s~(-1)), implying that the proposed method for estimating river discharge is acceptable. The present study provides an efficient way for the long-term monitoring of river discharge in large tidal rivers with heavy shipping traffic, such as the Qiantang River.
机译：2009年4月至2010年5月，在中国钱塘江成功进行了11次用于电流测量的往复往复声音传输实验。无处不在的是潮汐侵入，发生在杭州湾的春季潮汐时期。实验地点距离杭州湾口约90公里。沿海声学层析成像（CAT）系统由两个声学收发器单元组成，在河的两边各有一个，相隔3050 m。在声音传输实验期间，还沿着声音传输线进行了42次舰载声学多普勒剖面仪（ADP）调查，以获取用于相互声音传输数据的验证数据。由相互数据之间的传播时间差确定的沿垂直截面的平均电流与ADP结果非常吻合，均方根差为0.04 m s〜（-1）。 CAT很好地捕捉了由于潮汐洞的通过而引起的河流流量的突然变化。 CAT测得的河水流量（Qcat）的平均值为2170 m3 s〜（-1），但在钻孔过程中在-9097 m〜3 s〜（-1）和7985 m3 s〜（-1）之间变化。对于没有潮汐孔的时期，水位数据与根据CAT数据估算的稳定河流量有很好的相关性。利用这两个变量之间的经验关系，预测的年河流量（Qwl）为914 m3 s〜（-1）至11,982 m〜3 S〜（-1），平均值为2737 m〜。 3 s〜（-1）。提出了对潜在错误源的全面讨论。与Qwl的范围（11,068 m〜3 s〜（-1））相比，由此产生的Qwl误差（621 m〜3 s〜（-1））小，这表明所提出的估算河流流量的方法是可以接受的。本研究为长期监测交通繁忙的大潮河（例如钱塘江）的河流流量提供了一种有效的方法。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2012年第1期|p.54-65|共12页
  • 作者

    Xiao-Hua Zhu; Chuanzheng Zhang; Qingsong Wu; Arata Kaneko; Xiaopeng Fan; Bo Li;

  • 作者单位

    State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, 36 Baochubei Road, Hangzhou 310012, China Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan;

    State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, 36 Baochubei Road, Hangzhou 310012, China;

    State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, 36 Baochubei Road, Hangzhou 310012, China;

    Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan Department of Ocean Science and Engineering, Zhejiang University, Hangzhou 310058, China;

    State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, 36 Baochubei Road, Hangzhou 310012, China;

    State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, 36 Baochubei Road, Hangzhou 310012, China;

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  • 正文语种 eng
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  • 关键词

    coastal acoustic tomography; reciprocal sound transmission; current measurement; river discharge; tidal bore; qiantang river;

    机译：沿海声层析成像;双向传声;电流测量;河道流量;潮洞;钱塘江;

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