含水层参数识别的Monte-Carlo方法  

IDENTIFICATION OF AQUIFER PARAMETERS WITH MONTE-CARLO METHOD

作　　者：李守巨[1] 刘迎曦[1] 王登刚[1] 

机构地区：[1]大连理工大学工业装备结构分析国家重点实验室,大连116024

出　　处：《岩石力学与工程学报》2001年第1期95-98,共4页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金!资助项目 (5 97790 0 3);工业装备结构分析国家重点实验室开放基金

摘　　要：采用 Monte- Carlo随机模拟方法模拟观测数据 ,根据水头和流量观测数据识别含水层的导水系数。通过对经典最小二乘法目标函数的修正 ,添加了流量残差平方和最小一项 ,保证参数识别结果的唯一性。研究表明 ,当观测误差为正态分布时 ,参数识别结果也为正态分布。采用本文所提出的含水层参数识别方法 ,即使水头观测标准差达到 1m,参数识别结果的平均值与理论值的相对误差小于 1%。Based upon measured data of water head and flow, the transmissivities of aquifer are identified with Monte-Carlo random simulation to simulate the observed data. The uniqueness problem is solved by modifying the least squares method and adding a term of flow to the least squares criterion. The study results show that the identified values appear in normal distribution when the observed errors subject to the normal distribution. The relative error of the mean identified values of the transmissivity is less than 1% by making use of the identifying procedure suggested even if the standard error of observed water head approaches to 1 m.

关 键 词：含水层 参数识别 正态分布 MONTE-CARLO方法 渗 

分 类 号：P641.2[天文地球—地质矿产勘探] TV223.1[天文地球—地质学]