阐述了抽样误差的原理及其在水文分析中的应用，并做实例分析。
This paper mainly discusses principle and application of sample error in hydrological analysis, and analyses an example.
在数据质量评估中，我们除对抽样误差进行检查外，重点是对非抽样误差和偏差的检查。
Focus in data quality assessment is non-sampling errors and variance, in addition to sampling errors.
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