摘要
为研究马岭河回水区水文参数和溶解态氮、磷营养元素的时空分布特征,在马岭河丰水期(2016年9月)和枯水期(2017年2月份)进行分层采样,现场测定水体理化性质及实验室分析水中营养盐浓度。结果表明:水温夏季出现明显热分层:0~10m为表水层;10~20m为温跃层;20~50m为底温层;pH值7.85~8.16,水体呈弱碱性,丰水期氧化还原电位(ORP)在底部出现负值。氨氮(NH4+-N)、硝态氮(NO3--N)、磷酸盐(PO43--P)两期的平均浓度分别为0.18mg·L^-1、5.77mg·L^-1、0.07mg·L^-1,除PO43--P之外,NH4+-N、NO3--N均表现为丰水期高于枯水期。流域内非点源污染和底泥沉积物氮、磷营养盐释放是回水区氮、磷元素的主要补给源。
In order to study the temporal spatial distribution of hydrological parameters and dissolved nutrient elements of nitrogen and phosphorus in the backwater area of Malinghe River, stratified sampling was conducted during the flood season (September 2016) and dry season (February 2017).The physical and chemical properties of the water were measured on site and the concentration of nutrients in the water was analyzed in the laboratory.The results showed that: the water water temperature occurred obviously to thermal stratification that the water had striking three layers being the surface layer (0~10 m), the thermocline layer (10~20 m) as well as the bottom layer (20~50 m).pH value was between 7.85~8.16, and the water body was weakly alkaline.The Oxidation reduction potential (ORP) appears negative at the bottom.The average concentrations of NH4+-N、NO3--N, and PO43--P were 0.18 mg L-1, 5.77 mg L-1, and 0.07 mg L-1, respectively.In addition to PO43--P,NH4+-N、NO3--N showed a high wet season than dry season.The study found that the non-point source pollution in the watershed and the release of nitrogen and phosphorus nutrients from the sediment sediments were the main sources of nitrogen and phosphorus supply in the backwater area.
作者
袁子勇
曹玉平
焦树林
YUAN Zi-yong;CAO Yu-ping;JIAO Shu-lin(School of Tourism and Resource Environment/Qiannan Normal University for Nationalities, Duyun 558000, China;School of Geography and Environmental Science/Guizhou Normal University, Guiyang 550001, China;Key Laboratory of Remote Sensing Application on Mountain Resources and Environment in Guizhou Province, Guiyang,550001, China)
出处
《山东农业大学学报（自然科学版）》
北大核心
2019年第4期582-586,共5页
Journal of Shandong Agricultural University：Natural Science Edition
基金
国家自然科学基金:岩溶地下河与地表径流混合过程中溶解无机碳行为研究(41263011)
黔南民族师范学院2017年度学术新苗培养及创新探索专项(黔科合平台人才[2017]5728)
关键词
水环境
营养元素
时空分析
Water environment
nutrient elements
temporal and spatial analysis
