نتایج جستجو برای: sais confined aquifer
تعداد نتایج: 48611 فیلتر نتایج به سال:
The calculation of the discharge to a constant drawdown well or tunnel in the presence of an infinite linear constant head boundary in an ideal confined aquifer usually relies on the numerical inversion of a Laplace transform solution. Such a solution is used to interpret constant head tests in wells or to roughly estimate ground water inflow into tunnels. In this paper, a simple approximate so...
Hydraulic diffusivity is a fundamental parameter in studying groundwater flow. An analytical solution for flow within finite-length one-dimensional aquifer has been introduced. This simplifies the river water level (RWL) by piecewise linear function, accurately describing arbitrary variation pattern. inversion method hydraulic provided based on solution. Then, was employed to estimate of limest...
Hidroxo-sais lamelares de composição Cu 2 (OH) 3 X (X = NO 3 , CH 3 COO e ClO 4 ) foram sintetizados através da coprecipitação (sais básicos de nitrato e acetato) e da troca iônica (sal básico de perclorato). Os sólidos cristalinos foram caracterizados por difratometria de raios X, análise termogravimétrica e espectroscopia vibracional. Bandas fracas em 336 e 345 cm (espectro Raman) dos sais de...
To solve the problem of floor water inrush in process coal mining on a confined aquifer and study law instability, cemented filling method is proposed paper. Using river sand cement as materials, cementitious material with concentration 75% content 15% has best flow mechanical properties. Based elastic half-space theory bearing characteristics backfill, model stability established, critical cri...
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