Laboratory and numerical modeling investigations were completed to study the unconfined ground water flow and transport processes near a seepage-face boundary. The laboratory observations were made in a radial sand tank and included measurements of the height of the seepage face, flow velocity near the seepage face, travel time distribution of multiple tracer slugs, and streamlines. All the observations were reliably reproduced with a three-dimensional, axi-symmetric, variably saturated ground water flow model. Physical data presented in this work demonstrate and quantify the importance of three-dimensional transport patterns within a seepage-face zone. The results imply that vertically averaged flow models that employ Dupuit approximations might introduce error in the analysis of localized solute transport near a seepage-face boundary. The experimental dataset reported in this work will also be of interest for those who are attempting to validate a numerical algorithm for solving ground water and contaminant discharge patterns near a surface-water boundary.

Algorithms↗

PubMedDate not supplied

Exploring the relationship between cultural values, beliefs, and practices and patient falls: a Middle Eastern study.

Patient falls have been a concern in North American healthcare for many years. Studies have examined environmental, clinical, and patient variables for purposes of risk identification and fall reduction, primarily in the context of Western societies. An investigation at King Faisal Specialist Hospital and Research Centre in Riyadh, Saudi Arabia, began in 1993 to determine whether commonly reported risk factors apply to the Saudi patient population and whether cultural values, beliefs, and practices such as the performance of ablution before prayer, fasting during the holy month of Ramadan, and the need for socialization influence the rate of patient falls. The study included all inpatients (N = 379) who fell during a 3-year period.

Accidental Falls↗