摘要
间断性阶梯状抽水试验法是推求含水层水文地质参数的主要方法之一,传统的计算方法主要利用抽水阶段部分水位降深数据。基于泰斯假设、叠加原理,充分利用抽水及水位恢复阶段的全部资料,推求间断性阶梯状抽水计算公式。通过灵敏度分析确定导水系数T与贮水系数μ*对降深的影响,结果表明T较μ*对降深的影响更大,因此调参过程中应更加注意T的选取。结合Nash-Sutcliffe效率系数进行计算精度的评价,定量地判别水位降深计算值与水位降深观测值的拟合程度,从而选取最终的参数,求参结果可信。
Intermittent step-drawdown test is one of the major methods for aquifer parameters determination.Traditional analysis for step-drawdown tests always use selected data during the pumping period.In this paper,a new approach which is based on the Theis formula and the principle of superposition and all the data obtained from the tests are used to determine the aquifer parameters in step？drawdown tests is presented.Transmissivity（T）and storativity（μ＊）are used to determine the sensitivity analysis,the result shows drawdown s is influenced larger by Tthanμ＊.Nash-Sutcliffe efficiency coefficient is used to evaluate the computational accuracy and distinguish the fitting degree between the calculate value and the observed value quantitatively.
出处
《节水灌溉》
北大核心
2015年第5期60-62,65,共4页
Water Saving Irrigation
基金
吉林省科技厅重点攻关项目(20100452)
吉林省自然科学基金资助项目(20140101164JC)
国家潜在油气资源产学研用合作创新项目(20100331-OSR01-7)
