关于用稳定流抽水降落曲线q—s关系建立求解水文地质参数(Rs、K、R)新模型的探讨

本文以q/s曲线长度A和单位涌水量q、水位降深s之间关系,用达西渗透公式诱导和假设建立了求地下水向井q/s曲线及q/s曲线段间渗流速度公式,并用q/s曲线段间渗流速度Rs求得含水层渗透系数K,又用渗透系数K建立了反求影响半径R的假设公式。所建立的公式只适用于稳定流抽水试验中计算含水层的K和R的水文地质参数。

A PRELIMINARY STUDY ON A NEW MODEL OF CALCULATING HYDROGEOLOGICAL PARAMETERS (Rs, K, R) BY USING q-s RELATIONSHIPS OF PUMPING DEPRESSION CURVE OF STEADY FLOW

By using relationships between the length A of the curve q/s, the specific yieldq and the depth of decline of water levels, the author has established a formula for curve q/s of groundwater flow direction well and for velocity of interstlial flow of curve q/s section by derivation from Dacy's law. Meanwhile, the author obtains the aquifer penetration coefficient k by velocity R_3 of curve q/s section and through penetration coefficient k establishes, in inverse way, a tentative formula effecting radius R. The establishment of these formulae mentioned above, in different viewpoint, provides a new cognition on relationship between curve q/s (length A of curve q/s and penetration coefficient k are vectors) and hydrogeological parameters. The formula proposed in this paper is suitable only for the following two parameters, i.e. the calculation of the aquifer penetration coefficient k in pumping test for steady flow and the effecting radius R. In addition, the author also describes the process from derivation formula tentative formulacalculating method.