在整理和分析示踪沙扫测资料时，通过计算回收率来评价是否能算出计数率等值线的重心，以便进行输沙率或回淤量的定量计算。
The recovery of tracer shows whether the field tracer data can be used to calculate the transport sediment rate or the infill rate of sediment.
为了保证采集的结构面样本数量足够多，同时又使测量工作量最省，测线法应用时首先需要确定一个能够保证测量精度的最小测线长度——最佳测线长度。
To ensure the quantity of collected joint samples enough, and at the same time, to save surveying workload, the optimum scan line length should be determined first of all.
为了保证采集的结构面样本数量足够多，同时又使测量工作量最省，测线法应用时首先需要确定一个能够保证测量精度的最小测线长度——最佳测线长度。
To ensure the quantity of collected joint samples enough, and at the same time, to save surveying workload, the optimum scan line length should be determined first of all.
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