Vertical migrations of living organisms and settling of particle-attached organisms lead to uneven distributions of biota at different depths in the water column. In ballast tanks, heterogeneity could lead to different population estimates depending on the portion of the discharge sampled. For example, concentrations of organisms exceeding a discharge standard may not be detected if sampling oc...

With their application as seed coatings, the use of neonicotinoid insecticides increased dramatically during the last decade. They are now frequently detected in aquatic ecosystems at concentrations susceptible to harm aquatic invertebrates at individual and population levels. This study intent was to document surface runoff and subsurface tile drain losses of two common neonicotinoids (thiamet...

Introduction: Regarding cholecystectomy for acute cholecystitis, there is still debate regarding drain insertion. The aim of the present study was to detect if there is a beneficial added value to drain the abdomen in case of laparoscopic cholecystectomy for acute cholecystitis. Patients and Methods: A total of 120 patients diagnosed having acute cholecystitis were enrolled to this study and we...

OBJECTIVE To assess the medical and psychosocial effects of early hospital discharge after surgery for breast cancer on complication rate, patient satisfaction, and psychosocial outcomes. DESIGN Randomised trial comparing discharge from hospital 4 days after surgery (with drain in situ) with discharge after drain removal (mean 9 days in hospital). Psychosocial measurements performed before su...

Tile systems drain water applied to agricultural fields as irrigation and precipitation but also may intercept regional groundwater flow. Identification and characterization of the potential sources of tile water is essential for informed management of salinity and contaminants. Factors influencing tile discharge including depth of water applied, evapotranspiration, water storage, drain blockag...

This research was initiated with the objective of investigating the potential of constructed wetlands covered by duckweeds and connected to the branches of Bahr Hadous drain on its salinity, and subsequently, its discharge into El-Salam canal. Primarily, literature was reviewed. Data was assembled and analysed. The water quality model QUAL2K was used in this investigation. Moreover, electrical ...

introduction: better use of water and soil resources in paddy fields, increase in rice production and farmer's income, installation of subsurface drainage system is necessary. the main goalof these systems, are aeration conditions improvement prevention of water logging, yield increase, land use increase and multiuse of the land. in different countries, installation of subsurface drainage cause...