The flocculation behavior of clay minerals in aquatic environments is an important process estuarine and riverine dynamics, where strong gradients salinity can locally occur. Various contradicting observations have been reported the literature on impact salt concentration settling cohesive sediments. To address this issue a systematic manner, we investigate as function ambient water. Specifical...

Samples of urine which have been collected by ureteric catheterization are necessarily small in volume, often only a few drops. In order to determine the efficiency of kidney function it may be necessary to measure the specific gravity of these small samples, but it is impossible to use the hydrometer method, which requires a minimum of about 50 ml. of urine. Methods involving the suspension of...

Purpose. To rationalize well washing by considering the influence of annular channel limitation, granulometric composition mud, limitation joint movement mud particles, drill string rotation, shape channel, and rheological properties a cleaning agent. Methodology. Applied laboratory studies on drilling fluids are carried out using modern methods analytical analysis experimental studies, in part...

soil particle-size distribution (psd) is one of the most important physical attributes due to its great influence on soil physical, chemical, and biological properties. water infiltration rate, land-use change, soil erosion, and biological soil crusts (bscs) may influence psd in a soil. the multifractal measures were useful tools in characterization of psd in soils. the objective of the current...

one of the water resources modeling requirements is sufficient knowledge of long-term series of meteorological and hydrological parameters. in this study the nearest neighbor resampling method presented by lall and sharma was developed. in the developed model, the knn regression was used for time series forecasting instead of local polynomial used in the developed algorithm by prairie. in this ...

in many flood control projects, watershed management and water resources development, calculation of the river flow discharge is of the paramount importance which requires a comprehensive hydrological modeling of the region of interest. in this respect, lack of the existence of hydrometric and meteorology measuring stations in most of watersheds, has caused numerous problems in development and ...