Geochemistry and sediment in the main stream of the Ca River basin, Vietnam: weathering process, solute-discharge relationships, and reservoir impact

Ho Thi Phuong, Kenji Okubo, Azhar Uddin

Research output: Contribution to journalArticle

Abstract

In this study, we investigated the chemical composition of dissolved solids in the Ca River basin, North-Central Vietnam. Water samples were collected from August 2017 to July 2018 at three hydrological stations located in the main stream of the Ca River. Carbonate weathering was found as the dominant process controlling the water chemistry in that area. The average concentrations of dissolved solids generally decreased from upstream to downstream, resulting in low concentrations of the major ions in the downstream basin. Variations in the concentrations of major chemical ions and suspended solids at discharge were also investigated. Major chemical weathering products were found to behave chemostatically with increasing discharges upstream. However, dilution behaviors of solutes were shown in both midstream and downstream. Primary evidence shows that water storage in reservoirs impacts a variety of suspended solids and dissolved solids in the Ca River.

Original languageEnglish
JournalActa Geochimica
DOIs
Publication statusPublished - Jan 1 2019

Fingerprint

Geochemistry
Weathering
Discharge (fluid mechanics)
Catchments
solute
Sediments
weathering
river basin
Rivers
geochemistry
sediment
Water
Ions
ion
Carbonates
chemical weathering
water storage
river
water chemistry
Dilution

Keywords

  • Ca River
  • Carbonate weathering
  • Dissolved solids
  • Geochemistry
  • Suspended solids

ASJC Scopus subject areas

  • Geochemistry and Petrology

Cite this

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abstract = "In this study, we investigated the chemical composition of dissolved solids in the Ca River basin, North-Central Vietnam. Water samples were collected from August 2017 to July 2018 at three hydrological stations located in the main stream of the Ca River. Carbonate weathering was found as the dominant process controlling the water chemistry in that area. The average concentrations of dissolved solids generally decreased from upstream to downstream, resulting in low concentrations of the major ions in the downstream basin. Variations in the concentrations of major chemical ions and suspended solids at discharge were also investigated. Major chemical weathering products were found to behave chemostatically with increasing discharges upstream. However, dilution behaviors of solutes were shown in both midstream and downstream. Primary evidence shows that water storage in reservoirs impacts a variety of suspended solids and dissolved solids in the Ca River.",
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AU - Okubo, Kenji

AU - Uddin, Azhar

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