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Application of Evaluating Extreme Value with Newton (Tangent) Method in Evaluation of Water Quality Model Parameter
Author(s): 
Pages: 177-179
Year: Issue:  6
Journal: Environmental Science and Management

Keyword:  牛顿(切线)法水质模型参数估算应用;
Abstract: 文章根据水环境容量计算条件,建立了适用于中小河河流一雏忽略污染物沉降和弥散作用的数学模型.建立了由实测值与模型计算值之差的平方构成的目标函数.通过目标函数,把水质模型参数的估算转变成一个单变量函数求极值的问题.本文采用牛顿(切线)法求极值和计算机技术解决了这个单变量函数求极值问题,解决了在有多排污口存在的河段估算污染物衰减系数K值的难题.该办法的使用提高了水环境容量计算的可靠性和准确度.
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