Sediment dynamics in a large shallow lake characterized by seasonal flood pulse in Southeast Asia
| Autor: | Ty Sok, Sovannara Uk, Seingheng Hul, Heejun Yang, Chantha Oeurng, Layheang Song, Chihiro Yoshimura, Sokly Siev, Dilini Kodikara |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Hydrology
geography Suspended solids Environmental Engineering geography.geographical_feature_category 010504 meteorology & atmospheric sciences Flood myth Floodplain Sediment Vegetation 010501 environmental sciences Sedimentation 01 natural sciences Pollution Period (geology) Environmental Chemistry Environmental science Shallow lake Waste Management and Disposal 0105 earth and related environmental sciences |
| Zdroj: | Science of The Total Environment. :597-607 |
| ISSN: | 0048-9697 |
| Popis: | Most of studies on sediment dynamics in stable shallow lakes focused on the resuspension process as it is the dominant process. However, understanding of sediment dynamics in a shallow lake influenced by flood pulse is unclear. We tested a hypothesis that floodplain vegetation plays as a significant role in lessening the intensity of resuspension process in a shallow lake characterized by the flood pulse system. Therefore, this study aimed to investigate sediment dynamics in this type of shallow lake. The target was Tonle Sap Lake (TSL), which is a large shallow lake influenced by a flood pulse system of Mekong River located in Southeast Asia. An extensive and seasonal sampling survey was conducted to measure total suspended solid (TSS) concentrations, sedimentation and resuspension rates in TSL and its 4 floodplain areas. The study revealed that sedimentation process was dominant (TSS ranged: 3-126mgL-1) in the high water period (September-December) while resuspension process was dominant (TSS ranged: 4-652mgL-1) only in the low water period (March-June). In addition, floodplain vegetation reduced the resuspension of sediment (up to 26.3%) in water. The implication of the study showed that resuspension is a seasonally dominant process in shallow lake influenced by the flood pulse system at least for the case of TSL. |
| Databáze: | OpenAIRE |
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