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Nutrients accumulation in drainage channel sediments

International Journal of Sediment Research 2017年第2期32卷 180-185页

作者： radovan savic Gabrijel Ondrasek Ljubomir Letic Vesna Nikolic Vjekoslav Tanaskovik Faculty of Agriculture University of Novi Sad Faculty of Agriculture University of Zagreb Faculty of Forestry University of Belgrade Faculty of Agricultural Sciences and Food Ss.Cyril and Methodius University in Skopje

The drainage channel network in Vojvodina,northern part of the Republic of Serbia,in total length of around 20,000 km,transfers excessive(under)ground waters from around 2.15 million ha of *** are mostly in direct connection with the surrounding arable agricultural land and are exposed to different run-off,leaching and/or wind erosion *** to urban areas,some channel sections serve as recipients of unrefined sewage and industrial waste *** flows and velocities,as well as the transportable capacity of fluvial materials(sediments) are relatively ***,in combination with other natural and anthropogenic impacts,contributes to sediment generation in the drainage channel *** on around 100 sediment samples from 46 channels,concentrations of primary nutrients(N,P and K) were elaborated in this *** concentrations of macronutrients in the channel sediments(e.g.N 1-1.2%,P 100-265 and K 100-380 mg 100 g-1) exceeded their content in surrounding arable land by a few ***,significantly higher nutrient concentrations(in average by 50%) were detected in downstream(***) channel *** excessive presence of observed elements in channel sediments,due to interactive processes between water and sediment material,can adversely influence the water quality and life conditions for channel biota and caused other negative environmental impacts such as *** results clearly confirm that the processes of nutrient accumulation in channel sediments are greater than those in the surrounding,mostly intensively arable land *** erosion of unprotected agricultural areas and sediment transport as the most important pollution pathways from the drainage basin to channel network may be essential factors responsible for detected condition of nutrient accumulation.

关键词： Drainage channels Sediments,N,P,K Erosion

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