| 用水位恢复数据反演越流承压含水层参数 |
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| 引用本文： | 杨建民,郑刚.用水位恢复数据反演越流承压含水层参数[J].岩土力学,2008,29(6):1602-1606. |
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| 作者姓名： | 杨建民 郑刚 |
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| 作者单位： | 天津大学 建工学院土木系，天津 300072 |
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| 摘 要： | 水文地质勘测中，由于水位恢复阶段没有人力和机械因素干扰，由测量数据可以画出平滑的曲线，更适宜于分析水文地质参数，但经典非稳定流Theis公式和Theis水位恢复法所依据的若干假设条件在实际中难以满足。针对越流承压含水层具有补给条件而很快稳定以及非稳定抽水阶段流量常“抖动”的特点，论证了利用稳定流量和Hantush-Jacob越流模型计算的可行性，并用扩展的卡尔曼滤波器反演水文地质参数，经文献中历史数据和实地抽水试验检验结果表明，由该方法反演的预测值和实测值吻合良好。
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| 关 键 词： | 半承压含水层 单孔 水位恢复 扩展的卡尔曼滤波器 水文地质参数 |
| 收稿时间： | 2006-10-11 |
Parameter estimation for leaky aquifers using residual drawdowns |
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| YANG Jian-min,ZHENG Gang.Parameter estimation for leaky aquifers using residual drawdowns[J].Rock and Soil Mechanics,2008,29(6):1602-1606. |
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| Authors: | YANG Jian-min ZHENG Gang |
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| Institution: | Department of Civil Engineering, Tianjin University, Tianjin 300072, China |
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| Abstract: | In the pumping tests to determine hydrogeologic parameters, the residual drawdown are considered more reliable because of the automatically controlled flow rate to the well during the pump shut-off period. Some strict limits and assumptions in classical Theis well function and Theis recovery method induce that it’s not suitable to practice. In practice, leaky aquifers are more and their flow to well will reach steady soon, while the pump discharge often is unsteady after begin. The discharge in the steady flow is substitute into Hantush-Jacob leaky aquifer model; then the extended Kalman filter is used to compute the parameters such as transmissivity, storage coefficient and leakage coefficient. Comparing with historical and in-site data indicates that estimated data match well with pump test data. |
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| Keywords: | leaky aquifer single well recovery extended Kalman filter hydrogeologic parameters |
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