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Effects of cascade reservoir systems on the longitudinal distribution of sediment characteristics: a case study of the Heihe River Basin
- Source :
- Environmental Science and Pollution Research International
- Publication Year :
- 2021
- Publisher :
- Springer Berlin Heidelberg, 2021.
-
Abstract
- Spatial variations in grain-size parameters can reflect river sediment transport patterns and depositional dynamics. Therefore, 22 surficial sediment samples taken from the Heihe River and its cascade reservoirs were analyzed to better understand the impact of cascade reservoir construction on sediment transport patterns in inland rivers in China. The results showed that the longitudinal distribution of sediment grain size in the Heihe River was significantly affected by the influence of the cascade reservoirs. The grain size of the reservoir sediments within the cascade reservoir system was much lower than that of sediments in the natural river section, and the sediments in the natural river were well sorted, exhibiting leptokurtosis and positive or very positive skew. The lower reaches of the dammed river experienced strong erosion, and the grains of the bed sediments were coarse and poorly sorted; the grain-size distributions were more positively skewed and exhibited leptokurtosis. The backwater zone of the reservoir was influenced by both backwater and released water, and the sediment grain size was between the grain size of the natural river and that of the lower reaches of the dam; these sediments were moderately well sorted and had a positively skewed, leptokurtic grain-size distribution. Sedimentary environmental analysis revealed that the characteristics of the sediment grain size in an upstream tributary of the Heihe River were more influenced by source material than by hydrodynamic conditions, while the grain-size characteristics of the mainstream sediments were controlled mainly by hydrodynamic conditions.
- Subjects :
- China
Geologic Sediments
Health, Toxicology and Mutagenesis
Structural basin
Grain size distribution
Sedimentary depositional environment
Rivers
Tributary
Environmental Chemistry
Hydrology
geography
geography.geographical_feature_category
Sediment
food and beverages
General Medicine
Sediment control
Pollution
Erosion
Hydrodynamics
Environmental science
Sedimentary rock
Sediment transport
Water Pollutants, Chemical
Research Article
Heihe River
Cascade reservoir
Environmental Monitoring
Subjects
Details
- Language :
- English
- ISSN :
- 16147499 and 09441344
- Volume :
- 29
- Issue :
- 2
- Database :
- OpenAIRE
- Journal :
- Environmental Science and Pollution Research International
- Accession number :
- edsair.doi.dedup.....f01d93cb1dfc459c7f6832c3a97063db