多孔抽水试验求参方法分析比较
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摘要
针对松散含水层求参的问题,自行设计建设野外试验场并以抽水试验资料为依据,利用Hantush-Jacob直线图解法,Theis配线法,Dupuit单孔求参法和Dupuit多孔求参法分别计算了含水层的渗透系数和给水度,通过计算均方根RMSE的误差分析方法比较了4种方法所得参数的精度。结果表明:在非稳定流求参方法中,利用Jacob直线图解法和Theis配线法计算得到的T值精度相近,Hantush-Jacob直线图解法精度更高;在稳定流求参方法中,利用多孔抽水试验数据求参比单孔求参法精度高,但也次于非稳定流求参法所得参数的精度。
For the problem of parameter determination for loose aquifers, the field test site was designed and constructed based on pumping test data. The Hantush-Jacob linear graphical method, Theis wiring method,Dupuit single hole parameter method, and Dupuit porous parameter method were used to calculate.The permeability coefficient and water supply degree of the aquifer were compared and the accuracy of the parameters obtained by the four methods was compared by calculating the root mean square RMSE error analysis method. The results showed that the accuracy of the T values calculated by the Jacob linear graphic method and the Theis wiring method is similar in the unsteady flow method, and the Hantush-Jacob linear graphic method has higher accuracy. In the stable flow parameter estimation method, the method of using porous pumping test data to obtain a single hole parameter is more accurate than the single hole method, and is second only to the accuracy of the parameter obtained from the unsteady flow.
For the problem of parameter determination for loose aquifers, the field test site was designed and constructed based on pumping test data. The Hantush-Jacob linear graphical method, Theis wiring method,Dupuit single hole parameter method, and Dupuit porous parameter method were used to calculate.The permeability coefficient and water supply degree of the aquifer were compared and the accuracy of the parameters obtained by the four methods was compared by calculating the root mean square RMSE error analysis method. The results showed that the accuracy of the T values calculated by the Jacob linear graphic method and the Theis wiring method is similar in the unsteady flow method, and the Hantush-Jacob linear graphic method has higher accuracy. In the stable flow parameter estimation method, the method of using porous pumping test data to obtain a single hole parameter is more accurate than the single hole method, and is second only to the accuracy of the parameter obtained from the unsteady flow.
引文
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