Elevation-based Differentiation in Moisture and Nutrients of Sedimentary Layer in the Water-Level Fluctuation Zone of the Three Gorges Reservoir, China
［Objective］ To investigate the elevation-based differentiation in moisture and nutrients of sedimentary layer in the water-level fluctuation zone (WLFZ) and provide a scientific basis for reservoir management. ［Methods］ The WLFZ of the Three Gorges Reservoir was selected as the research object and l...
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Editorial Department of Journal of Soil and Water Conservation
2025-04-01
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| Series: | Shuitu Baochi Xuebao |
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| Online Access: | http://stbcxb.alljournal.com.cn/stbcxben/article/abstract/20250222 |
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| author | HE Pingsheng LI Jinlin HE Xiubin TANG Qiang WU Shengjun HUANG Ping |
| author_facet | HE Pingsheng LI Jinlin HE Xiubin TANG Qiang WU Shengjun HUANG Ping |
| author_sort | HE Pingsheng |
| collection | DOAJ |
| description | ［Objective］ To investigate the elevation-based differentiation in moisture and nutrients of sedimentary layer in the water-level fluctuation zone (WLFZ) and provide a scientific basis for reservoir management. ［Methods］ The WLFZ of the Three Gorges Reservoir was selected as the research object and layered sample were collected from a representative slope. The particle size distribution, nutrient concentration, and moisture content were measured, and the differences in sediment properties at different elevations were analyzed. ［Results］ 1) The particles of the sediment in the WLFZ were relatively fine, with a median particle size ranging from 6.1 to 13.5 μm and an average of 8.7 μm. No significant difference in median particle size was observed among sediments at varying elevations (p>0.05). The particle size distribution of the sediments was dominated by silt, with an average volume content of 82.7%, and the contents of clay and sand were 14.2% and 3.1%, respectively. 2) The mean total organic carbon (TOC), total nitrogen (TN), and total phosphorus (TP) contents of the sediments in the WLFZ were 18.82, 1.24 and 0.75 g/kg, respectively. The stoichiometric ratios of carbon, nitrogen, and phosphorus (C∶N, C∶P, and N∶P) were 15.25, 25.26 and 1.68, respectively. Significant differences were observed in the overall trends of nutrient content changes with elevation. Specifically, TOC and TN contents increased significantly with increasing elevation (p<0.05), while TP content did not show a clear trend. The stoichiometric ratios of C∶P and N∶P in the sediments increased with increasing elevation, while the C∶N ratio showed no significant trend (p>0.05). 3) The average mass water content of the sediments in the WLFZ was 28.63%, and no significant elevation-based spatial differentiation was observed (p>0.05). 4) The particle size distribution, nutrient content, and moisture content of sediments in the WLFZ were distributed in striated layers formed by alternating high and low values along the profile. ［Conclusion］ There is a significant elevation-based differentiation in the nutrient content of the sediments in the WLFZ of the Three Gorges Reservoir, but there is no significant spatial differentiation in particle composition and mass water content. |
| format | Article |
| id | doaj-art-9e0f5040119f4f2eab9bb5200f42c039 |
| institution | OA Journals |
| issn | 1009-2242 |
| language | zho |
| publishDate | 2025-04-01 |
| publisher | Editorial Department of Journal of Soil and Water Conservation |
| record_format | Article |
| series | Shuitu Baochi Xuebao |
| spelling | doaj-art-9e0f5040119f4f2eab9bb5200f42c0392025-08-20T02:20:18ZzhoEditorial Department of Journal of Soil and Water ConservationShuitu Baochi Xuebao1009-22422025-04-0139220921710.13870/j.cnki.stbcxb.2025.02.0281009-2242(2025)02-0209-09Elevation-based Differentiation in Moisture and Nutrients of Sedimentary Layer in the Water-Level Fluctuation Zone of the Three Gorges Reservoir, ChinaHE Pingsheng0LI Jinlin1HE Xiubin2TANG Qiang3WU Shengjun4HUANG Ping5College of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing 400074, ChinaChongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, ChinaInstitute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610299, ChinaSchool of Geographical Sciences, Southwest University, Chongqing 400715, ChinaChongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, ChinaChongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China［Objective］ To investigate the elevation-based differentiation in moisture and nutrients of sedimentary layer in the water-level fluctuation zone (WLFZ) and provide a scientific basis for reservoir management. ［Methods］ The WLFZ of the Three Gorges Reservoir was selected as the research object and layered sample were collected from a representative slope. The particle size distribution, nutrient concentration, and moisture content were measured, and the differences in sediment properties at different elevations were analyzed. ［Results］ 1) The particles of the sediment in the WLFZ were relatively fine, with a median particle size ranging from 6.1 to 13.5 μm and an average of 8.7 μm. No significant difference in median particle size was observed among sediments at varying elevations (p>0.05). The particle size distribution of the sediments was dominated by silt, with an average volume content of 82.7%, and the contents of clay and sand were 14.2% and 3.1%, respectively. 2) The mean total organic carbon (TOC), total nitrogen (TN), and total phosphorus (TP) contents of the sediments in the WLFZ were 18.82, 1.24 and 0.75 g/kg, respectively. The stoichiometric ratios of carbon, nitrogen, and phosphorus (C∶N, C∶P, and N∶P) were 15.25, 25.26 and 1.68, respectively. Significant differences were observed in the overall trends of nutrient content changes with elevation. Specifically, TOC and TN contents increased significantly with increasing elevation (p<0.05), while TP content did not show a clear trend. The stoichiometric ratios of C∶P and N∶P in the sediments increased with increasing elevation, while the C∶N ratio showed no significant trend (p>0.05). 3) The average mass water content of the sediments in the WLFZ was 28.63%, and no significant elevation-based spatial differentiation was observed (p>0.05). 4) The particle size distribution, nutrient content, and moisture content of sediments in the WLFZ were distributed in striated layers formed by alternating high and low values along the profile. ［Conclusion］ There is a significant elevation-based differentiation in the nutrient content of the sediments in the WLFZ of the Three Gorges Reservoir, but there is no significant spatial differentiation in particle composition and mass water content.http://stbcxb.alljournal.com.cn/stbcxben/article/abstract/20250222sedimentsproperties of soil moisture and nutrientsspatial differentiationwater-level fluctuation zonethe three gorges reservoir |
| spellingShingle | HE Pingsheng LI Jinlin HE Xiubin TANG Qiang WU Shengjun HUANG Ping Elevation-based Differentiation in Moisture and Nutrients of Sedimentary Layer in the Water-Level Fluctuation Zone of the Three Gorges Reservoir, China Shuitu Baochi Xuebao sediments properties of soil moisture and nutrients spatial differentiation water-level fluctuation zone the three gorges reservoir |
| title | Elevation-based Differentiation in Moisture and Nutrients of Sedimentary Layer in the Water-Level Fluctuation Zone of the Three Gorges Reservoir, China |
| title_full | Elevation-based Differentiation in Moisture and Nutrients of Sedimentary Layer in the Water-Level Fluctuation Zone of the Three Gorges Reservoir, China |
| title_fullStr | Elevation-based Differentiation in Moisture and Nutrients of Sedimentary Layer in the Water-Level Fluctuation Zone of the Three Gorges Reservoir, China |
| title_full_unstemmed | Elevation-based Differentiation in Moisture and Nutrients of Sedimentary Layer in the Water-Level Fluctuation Zone of the Three Gorges Reservoir, China |
| title_short | Elevation-based Differentiation in Moisture and Nutrients of Sedimentary Layer in the Water-Level Fluctuation Zone of the Three Gorges Reservoir, China |
| title_sort | elevation based differentiation in moisture and nutrients of sedimentary layer in the water level fluctuation zone of the three gorges reservoir china |
| topic | sediments properties of soil moisture and nutrients spatial differentiation water-level fluctuation zone the three gorges reservoir |
| url | http://stbcxb.alljournal.com.cn/stbcxben/article/abstract/20250222 |
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