مروری بر کاربرد علم توزیع اندازه ذرات رسوبی در مقیاس‌های مکانی و زمانی

Investigation of sediment particle size distribution (SPSD) was considered as a new science to investigate the SPSD interactions in fluvial systems by hydrologists, geomorphologists and geochemists since 1980s. Accurate understanding of complexities of SPSD behavior in different environments will help overcoming management problems in soil and water conservation as well as pollutants transferring in the environment. This study was conducted to provide comprehensive information about the importance and application of SPSD in different spatial and temporal scales. The present study at first provided the definition of SPSD from different perspectives of scientists, then introduced the SPSD measurement methods and finally, investigated SPSD variation at different spatial and temporal scales. Such information could be used for better understanding and management of transport of sediment and sediment-associated nutrients as well as contaminants such as phosphorus, pesticides, heavy metals and pathogenic agents. In addition, the results are useful in engineering projects such as drinking water, wastewaters and rivers and is valuable to identify the soil erosion processes.