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南水北调后南四湖沉积物氮磷和有机质特征分析

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本文通过采集南水北调东线工程后南四湖典型水域水样和柱状沉积物,分析水质指标以及沉积物总氮(TN)、总磷(TP)和有机质(OM)含量及其之间的相关性.结果表明:南四湖沉积物TN含量介于750~6290 mg/kg,平均为3402 mg/kg;TP含量介于 873~1289 mg/kg,平均为 1127 mg/kg,均一化明显;沉积物OM含量介于3.20%~13.85%,平均为9.37%,需要关注OM过高对底栖生物的危害;南四湖水质处于中度富营养化水平,沉积物中TN、TP和OM含量丰富,且有缓慢增加的现象;水质与沉积物之间相关性不显著,沉积物TN与OM相关性极显著(P<0.01);沉积物中的C/N比值介于12.95~21.37,平均值为16.72±1.44,这反应南四湖有机质来源是以陆源输入为主.因此,应持续关注南四湖生态环境治理问题.
ANALYSIS OF THE CHARACTERISTICS OF NITROGEN,PHOSPHORUS,AND ORGANIC MATTER IN SEDIMENTS OF THE NANSI LAKE AFTER THE SOUTH-TO-NORTH WATER DIVERSION PROJECT
This paper analyzed water quality indicators,total nitrogen(TN),total phosphorus(TP),and organic matter(OM)content in sediments and their correlations by collecting water samples and columnar sediments from the typical waters of the Nansi Lake after the completion of the East Route of the South-to-North Water Diversion Project.The results showed that the TN content in the sediments of the Nansi Lake ranged from 750 to 6290 mg/kg with an average of 3402 mg/kg;The TP content ranged from 873 to 1289 mg/kg with an average of 1127 mg/kg,showing significant homogenization;The content of OM in sediments ranged from 3.20%to 13.85%with an average of 9.37%.Attention should be paid to the harm of excessive OM to benthic organisms.The results showed that the water quality of the Nansi Lake was at a moderate eutrophication level,and the contents of TN,TP,and OM in the sediment were rich and slowly increasing.Correlation analysis showed that the correlation between water quality and sediments were not significant,while the correlation between sediment TN and OM was significant(P<0.01).The C/N ratio in the sediment ranges from 12.95 to 21.37 with an average value of 16.72±1.44,which indicates that the organic matter source of the Nansi Lake is mainly terrestrial input.Therefore,continuous attention should be paid to the ecological and environmental governance issues of the Nansi Lake.

sedimentwater qualitycorrelationthe Nansi Lakethe South-to-North Water Diversion Project

高云芳、丛旭日、冷春梅、刘峰、董贯仓、郑慧丽

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山东省淡水渔业研究院,250013,济南

沉积物 水质 相关性 南四湖 南水北调

2024

山东师范大学学报(自然科学版)
山东师范大学

山东师范大学学报(自然科学版)

影响因子:0.145
ISSN:1001-4748
年,卷(期):2024.39(1)
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