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[1]ZHANG Handan,DANG Ning,LIN Xuefeng,et al.Distribution Characteristics of Nutrients and Pollution Status Evaluation of Sediments in Changtan Reservoir[J].Research of Soil and Water Conservation,2023,30(02):438-443,450.[doi:10.13869/j.cnki.rswc.2023.02.041]

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Distribution Characteristics of Nutrients and Pollution Status Evaluation of Sediments in Changtan Reservoir

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 30 Number of periods: 2023 02 Page number: 438-443,450 Column: Public date: 2023-03-10

Title:: Distribution Characteristics of Nutrients and Pollution Status Evaluation of Sediments in Changtan Reservoir

Author(s):: ZHANG Handan¹, DANG Ning¹, LIN Xuefeng², ZOU Yiqiao², WU Jiang³, MA Guilian³, CHEN Guangcai¹; (1.Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou 311400, China; 2.Taizhou National Land Space Improvement and Ecological Restoration Center, Taizhou, Zhejiang 318000, China; 3.Forestry Technology Promotion Station of Huangyan District, Taizhou, Zhejiang 318020, China)

Keywords:: Changtan Reservoir; sediment; TOC; TN; TP; chemometric characteristics; pollution evaluation

CLC:: X524

DOI:: 10.13869/j.cnki.rswc.2023.02.041

Abstract:: The aim of this study is to investigate the characteristics of the contents of carbon(C), nitrogen(N)and phosphorus(P)in the sediments of Changtan Reservoir and the pollution status, thus to provide theoretical basis for the improvement of regional water environment quality. This study set up 28 sampling points within the reservoir in September 2021, which included 8 inlet tributary sections and the central area of the reservoir. The surface sediments were selected to measure the contents of total organic carbon(TOC), total nitrogen(TN), and total phosphorus(TP). Meanwhile, the pollution status of the reservoir was evaluated by single factor index method, integrated pollution index method, and organic pollution index method. Results showed that the contents of TOC, TN and TP in the surface sediments of the reservoir area were(13.67±3.81)g/kg,(1.46±0.37)g/kg, and(0.43±0.17)g/kg, respectively; specifically, the TOC content in RJR was significantly higher than that in other sampling sites(p<0.05); the C/N, C/P and N/P ratios in the surface sediments ranged from 7.72 to 15.07, 15.28 to 63.20, and 1.66 to 6.26, respectively; according to the single factor index and comprehensive pollution index, the whole reservoir was suffering from heavy TN pollution; the organic nitrogen index further indicated that the reservoir was at the levelⅢ, among which the central area and RJR were heavily polluted by organic nitrogen(level Ⅳ); there was a certain amount of endogenous pollution in Changtan Reservoir, mainly for the organic pollution. More attentions should be paid to the dynamics of nutrients in the sediments of Changtan Reservoir.

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Last Update: 2023-03-10