PMID- 30412882
OWN - NLM
STAT- MEDLINE
DCOM- 20190304
LR  - 20190304
IS  - 1879-1026 (Electronic)
IS  - 0048-9697 (Linking)
VI  - 653
DP  - 2019 Feb 25
TI  - Nutrient dynamics and eutrophication assessment in the tropical river system of 
      Saigon - Dongnai (southern Vietnam).
PG  - 370-383
LID - S0048-9697(18)34216-5 [pii]
LID - 10.1016/j.scitotenv.2018.10.319 [doi]
AB  - Saigon-Dongnai Rivers in Southern Vietnam is a complex lowland hydrological 
      network of tributaries that is strongly influenced by the tidal cycles. The 
      increasing economic, industrial and domestic developments in and around Ho Chi 
      Minh City (HCMC) have led to serious impacts on water quality due to lack of 
      appropriate wastewaters treatment. Drinking water production is impacted and the 
      large aquaculture production areas may also be affected. We analyzed spatial and 
      seasonal variability of nutrient concentrations (Phosphorus, Nitrogen and Silica) 
      and eutrophication indicators (Organic Carbon, Chlorophyll-a and Dissolved 
      Oxygen) based on bi-monthly monitoring during two hydrological cycles (July 
      2015-December 2017). Four monitoring sites were selected to assess the impact of 
      HCMC: two upstream stations on the Saigon River and Dongnai River branches to 
      provide the reference water quality status before reaching the urbanized area of 
      HCMC; one monitoring station in the city center to highlight Saigon River water 
      quality within the heart of the megacity; the fourth station downstream of the 
      confluence to evaluate the impact of HCMC on the estuarine waters. This study 
      points to excess nutrients in HCMC's water body with concentrations of NH(4)(+) 
      and PO(4)(3-) averaging to 0.7 +/- 0.6 mgN L(-1) and 0.07 +/- 0.06 mgP L(-1), 
      respectively in mean over the monitored period and rising up to 3 mgN L(-1) and 
      0.2 mgP L(-1), in extreme conditions. During the dry season, we evidenced that 
      untreated domestic discharges leads to degradation of the Saigon River's water 
      quality with extreme values of algal biomass (up 150 muChl-a L(-1)) and hypoxic 
      conditions occurring episodically (DO < 2 mg L(-1)) in the heart of the megacity. 
      Until now, eutrophication in the urban center has had no clear effect downstream 
      because eutrophic water mass from the Saigon River is efficiently mixed with the 
      Dongnai River and sea water masses during the successive semi-diurnal tidal 
      cycles.
CI  - Copyright (c) 2018 Elsevier B.V. All rights reserved.
FAU - Nguyen, Tuyet T N
AU  - Nguyen TTN
AD  - Universite Grenoble Alpes, CNRS, IRD, Grenoble INP,(1) IGE, F-38000 Grenoble, 
      France; CARE, Ho Chi Minh City University of Technology, VNU-HCM, Viet Nam. 
      Electronic address: tuyet.nguyen@univ-grenoble-alpes.fr.
FAU - Nemery, Julien
AU  - Nemery J
AD  - Universite Grenoble Alpes, CNRS, IRD, Grenoble INP,(1) IGE, F-38000 Grenoble, 
      France; CARE, Ho Chi Minh City University of Technology, VNU-HCM, Viet Nam.
FAU - Gratiot, Nicolas
AU  - Gratiot N
AD  - Universite Grenoble Alpes, CNRS, IRD, Grenoble INP,(1) IGE, F-38000 Grenoble, 
      France; CARE, Ho Chi Minh City University of Technology, VNU-HCM, Viet Nam.
FAU - Strady, Emilie
AU  - Strady E
AD  - Universite Grenoble Alpes, CNRS, IRD, Grenoble INP,(1) IGE, F-38000 Grenoble, 
      France; CARE, Ho Chi Minh City University of Technology, VNU-HCM, Viet Nam.
FAU - Tran, Viet Quoc
AU  - Tran VQ
AD  - CARE, Ho Chi Minh City University of Technology, VNU-HCM, Viet Nam.
FAU - Nguyen, An Truong
AU  - Nguyen AT
AD  - CARE, Ho Chi Minh City University of Technology, VNU-HCM, Viet Nam.
FAU - Aime, Joanne
AU  - Aime J
AD  - IRD, Viet Nam.
FAU - Peyne, Alice
AU  - Peyne A
AD  - CARE, Ho Chi Minh City University of Technology, VNU-HCM, Viet Nam.
LA  - eng
PT  - Journal Article
DEP - 20181026
PL  - Netherlands
TA  - Sci Total Environ
JT  - The Science of the total environment
JID - 0330500
RN  - 0 (Water Pollutants, Chemical)
RN  - 27YLU75U4W (Phosphorus)
RN  - N762921K75 (Nitrogen)
RN  - Z4152N8IUI (Silicon)
SB  - IM
MH  - Cities
MH  - *Environmental Monitoring
MH  - *Eutrophication
MH  - Nitrogen/*analysis
MH  - Phosphorus/*analysis
MH  - Rivers/*chemistry
MH  - Seasons
MH  - Silicon/*analysis
MH  - Tropical Climate
MH  - Vietnam
MH  - Water Pollutants, Chemical/*analysis
MH  - Water Quality
OTO - NOTNLM
OT  - Eutrophication
OT  - Megacity
OT  - Nutrients
OT  - Tidal river
OT  - Water quality
EDAT- 2018/11/10 06:00
MHDA- 2019/03/05 06:00
CRDT- 2018/11/10 06:00
PHST- 2018/08/22 00:00 [received]
PHST- 2018/10/23 00:00 [revised]
PHST- 2018/10/23 00:00 [accepted]
PHST- 2018/11/10 06:00 [pubmed]
PHST- 2019/03/05 06:00 [medline]
PHST- 2018/11/10 06:00 [entrez]
AID - S0048-9697(18)34216-5 [pii]
AID - 10.1016/j.scitotenv.2018.10.319 [doi]
PST - ppublish
SO  - Sci Total Environ. 2019 Feb 25;653:370-383. doi: 10.1016/j.scitotenv.2018.10.319. 
      Epub 2018 Oct 26.