Abstract Siombak Lake is an artificial lake in Medan City. We investigated microplastic pollution tropical tidal waters the current research. Grab samples of water and sediments were taken by Indonesian standards. Organic digestion density separation used preparation sample. The categorization polymer was determined Raman Spectrophotometry, quantity shape, microscopy. result indicated that sedi...

The article deals with one of the most important problems mechanization rural and economic work on state irrigation canals ensuring their high-quality functioning. Irrigation canals, water intakes hydraulic structures are destructed deformed from natural climate artificial factors. A large capacity bucket shovel form equipped roller designed for cleaning lined silting sediment was considered. l...

In the last decade, the aquatic eddy correlation (EC) technique has proven to be a powerful approach for non-invasive measurements of oxygen fluxes across the sediment water interface. Fundamental to the EC approach is the correlation of turbulent velocity and oxygen concentration fluctuations measured with high frequencies in the same sampling volume. Oxygen concentrations are commonly measure...

Sediment samples from the coastal area of Asaluyeh harbor were collected during autumn and spring 2015. The acid-volatile sulfide (AVS) and simultaneously extracted metals (SEMs) were measured to assess the sediment quality and potential ecological risks. The average concentrations (and relative standard deviation (RSD)) of AVS in the industrial sediments were 12.32 μmol/g (36.91) and 6.34 μmol...

Studies about sediment erosion were mainly concentrated on the river channel sediment, the terrestrial sediment, and the underground sediment. The transport process of underground sediment is studied in the paper. The concept of the flush potential sediment is founded. The transport equation with stable saturated seepage is set up, and the relations between the flush potential sediment and wate...