半承压含水层按稳定流承压含水层求参数的讨论

DISCUSSION ON CALCULATED PARAMETER FOR THE SEMIPRESSURE-AQUIFER IN ACCORDENCE WITH THE PRESSURE-AQUIFER OF STATIONARY FLOW

用稳定流承压含水层公式对半承压含水层求参数时,计算出的导水系数“T”比非稳定流计算出的要大,影响半径R与经验系数相比普通偏小.用水位恢复法计算也同样.原因在于半承压含水层中地下水受潜水垂向越流补给及水平径向补给,因而用稳定流承压含水层法计算时,或者修改公式,或者用非稳定流计算.

The fomula for the pressure aquifer of stationary wolf is used to find the parameters for the semipressure aquifer. The calculated awter-conducting coefficient 'T' will be larger than that of nonstationary flow, and the radius R of influence is usually inclined to the small side compared with the empirical datum. The same results were obtained with the water-level restitution method. The reason lies in that the subterrenian water in the semipressure aquifer is supplied by the vertical overflow and its horizontal run-off of phreatic water. Therefore, the fomula must be modified or the nonstationary method should be used when calculations are conducted with the method of pressure-aquifer of stationary flow.