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中文摘要：
基于珠江水系干流之一的西江上游14个水文测站水位流量数据，应用非线性最小二乘法（NLS）和异方差最大似然估计法（HMLE）分别绘制每个测站水位流量曲线标准残差图．结果表明：14个水文测站中有5个测站对NI。S是适用的，9个测站对NLS不适用；而对于HMLE法，则有11个测站是适用的，仅3个测站不适用．因此，对比NLS法，HMLE法大大提高了对水位流量曲线的适用性．
英文摘要：
Based on the statistics of the streamflow series of 14 hydrological stations located on the West River ba- sin upstream, a tributary of the Pearl River, we drew standard residual plots for each station. The results indicate that the nonqinear least square method （NLS） performs well on 5 stations while the others are not. Whereas, heterosce- dastic maximum likelihood estimation （HMLE） performs well on 11 stations while only 3 stations are not. As a re- sult, HMLE could be a good approach to fit the stage-discharge curves.
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