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分析了管网压力异常工况下的节点水压变化,建立了管网趋势面分析模型,通过比对管网正常工况和异常工况下的趋势图和残差图,判断管网发生漏损现象程度及大体范围,并对某市管网进行了实例分析。“,”The changes of the nodes pressure under abnormal conditions are analyzed and the trend-surface analysis model for water-supply pipe network is established in this paper.Through contrasting trend chart and the diversity chart under the conditions of normal