| Title |
A Study on the Nutrient Release Characteristics from Sediments in Nak-dong River |
| Authors |
이규열 ( Kyu Yeol Lee ) ; 이권철 ( Kwon Choel Lee ) ; 김주언 ( Ju Eon Kim ) ; 김신 ( Shin Kim ) ; 안정민 ( Jung Min Ahn ) ; 임태호 ( Tae Hyo Im ) |
| DOI |
https://doi.org/10.15681/KSWE.2015.31.6.644 |
| Keywords |
Nak-dong River; Nutrient; Phosphorus; Sediment; Release; Water quality |
| Abstract |
In this study the releasing of nutrients from sediments of Nak-dong River were investigated. We perfomed lab-scale simulation experiments using field sediment and ware. Nutrients, orgarni matter, particle size of the sediments and nutrients of released water were analyzed. Analyzed results of the sediments, mainly composed of mS(muddy Sand) sedimentary facies and IL were 2.46~6.83%, T-N were 1.189~2.492 mg/kg, and T-P were 333~726 mg/kg in the study area. Analyzed results of the nutrients of released water, pH and TOC were each 7.8~9.2% and 31.7~40.8% decreased after 20 days. T-N increased steadily, and NH3-N increased steadily then decreased, at this time NO3-N increase. Also NH3-N increased steadily, then decreased at this time. Furthermore release of phosphorus were mostly decreased. |