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| Fundamental study on the utilization of sediment in reservoir: A case study of Dapu area in the Biliuhe reservoir |
| Received:December 01, 2017 |
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| KeyWord:Biliuhe reservoir;siltation;sediment;land use |
| Author Name | Affiliation | E-mail | | YU Hui-juan | School of Hydraulic Engineering, Dalian University of Technology, Dalian 116024, China | | | XU Shi-guo | School of Hydraulic Engineering, Dalian University of Technology, Dalian 116024, China | sgxu@dlut.edu.cn | | ZHU Lin | School of Hydraulic Engineering, Dalian University of Technology, Dalian 116024, China | |
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| Abstract: |
| To solve the problems associated with dredging sediments, in the present study, fundamental analyses were conducted for sediments collected from the Biliuhe reservoir. The feasibility of land use of reservoir sediments was analyzed with respect to sediment acidity, soil type, nutrient richness and spatial distribution, and current state and toxicity of heavy metals. Over 66.7% of the samples in each sediment layer were in the pH range 6.0~7.5, and over 76.2% of the samples were loam. The average organic matter content in each sediment layer ranged from 27.13 to 35.77 g·kg-1, and the content of over 81.0% of the samples was higher than the minimum levels for this basin. Analysis of the spatial distributions of nutrients in each sediment layer revealed that samples with higher organic matter content were mainly distributed near the river channel and the national highway, while those with lower organic matter content were located futher from the right bank of the Biliuhe channel. With respect to heavy metals, the average content of copper, lead, and zinc was within the limit of the national standards, although that of cadmium was not. The results of the heavy metal evaluation revealed low levels of Fe, Mn, Cu, Pb and Zn pollution, and high levels of Cd pollution, amounting to an overall high level of heavy metal pollution. The results indicate that sediments in the Dapu area can be safely used for venues, greening, commercial land, public municipal land, and other class Ⅱ lands. It can be used for class Ⅰ land, which is directly exposed to humans, but pretreatment should be conducted to ensure safety. |
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