Pollution characteristics and risk assessment of phosphorus, nitrogen, and organic carbon in the surface sediments of Hongfeng Reservoir and Baihua Reservoir in Guiyang City.

Key Points

• This research aims to evaluate the pollution characteristics and assess the risk of phosphorus, nitrogen, and organic carbon in surface sediments of two reservoirs.
• Collected sediment samples from 62 points in Hongfeng and Baihua Reservoirs
• Analyzed total phosphorus, total nitrogen, and total organic carbon levels in sediments
• Employed pollution index methods for risk assessment
• Average total phosphorus levels were 633.46 mg/kg in Hongfeng and 802.48 mg/kg in Baihua
• Average total nitrogen levels were 6018.03 mg/kg in Hongfeng and 7359.26 mg/kg in Baihua
• Average total organic carbon levels were 61.29 mg/g in Hongfeng and 72.25 mg/g in Baihua
• Sediments exhibited moderate to severe pollution levels for TP, TN, and TOC indices