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  1. Article ; Online: An Approach for Flow Forecasting in Ungauged Catchments – A Case Study for Ho Ho reservoir catchment, Ngan Sau River, Central Vietnam

    Kha Dinh Dang / Nguyen Y Nhu / Tran Ngoc Anh

    Journal of Ecological Engineering, Vol 19, Iss 3, Pp 74-

    2018  Volume 79

    Abstract: Reservoir inflow forecasting with high reliability plays an important role in the operation and management of the reservoir for power generation, irrigation, flood prevention as well as ensuring the safety of the dam. However, the level of forecast ... ...

    Abstract Reservoir inflow forecasting with high reliability plays an important role in the operation and management of the reservoir for power generation, irrigation, flood prevention as well as ensuring the safety of the dam. However, the level of forecast accuracy is limited, since its performance depends on rainfall forecasting and hydrological model. In order to increase the efficiency of forecasting, this study introduces the inflow forecasting method that integrates the real-time updating techniques with continuous optimization method of MIKE NAM model to specify the appropriate parameter set for forecasting time. The proposed forecasting method was tested for the Ho Ho reservoir, the area facing the scarcity of historical data for model calibration and verification. The analysis of the forecasting results for Ho Ho reservoir using transferred parameters from the stable calibrated parameter values at Hoa Duyet station (downstream of Ho Ho reservoir) and the results obtained using the adapted parameters by the proposed method shows that the adapted parameter values provides a more reliable forecast, which will better serve the decision making.
    Keywords real time updating ; flood ; forecasting ; ungauged catchment ; Environmental technology. Sanitary engineering ; TD1-1066 ; Environmental sciences ; GE1-350
    Subject code 550
    Language English
    Publishing date 2018-05-01T00:00:00Z
    Publisher Polish Society of Ecological Engineering (PTIE)
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article: Assessing pollution characteristics and human health risk of exposure to PM₂.₅-bound trace metals in a suburban area in Hanoi, Vietnam

    Nguyen, Thi Phuong Mai / Bui, Thi Hieu / Nguyen, Manh Khai / Ta, Thuy Nguyen / Tran, Thi Minh Hang / Nguyen, Y. Nhu / Nguyen, Thi Hue

    Human and ecological risk assessment. 2022 Apr. 21, v. 28, no. 3-4

    2022  

    Abstract: Fine particles (PM₂.₅) in the atmosphere, especially PM₂.₅ bounded with trace metals, pose potentially adverse human health risks. This study aimed to characterize the trace elements in PM₂.₅ in a suburban area of Hanoi from November 2019 to December ... ...

    Abstract Fine particles (PM₂.₅) in the atmosphere, especially PM₂.₅ bounded with trace metals, pose potentially adverse human health risks. This study aimed to characterize the trace elements in PM₂.₅ in a suburban area of Hanoi from November 2019 to December 2020. The study area represented a mixture of industrial, agricultural, and residential areas. The results revealed that PM₂.₅ mass was highest in winter due to the stable meteorological conditions, which disfavor the particulate matter dispersion in the atmosphere. Fe, Mg, Zn, K, and Al were the most abundant elements in PM₂.₅, accounting for 29.6, 19.0, 16.3, 15.8, and 11.3% of the total concentration of metals, respectively. PM₂.₅-bound trace metals were highest in winter, followed by autumn and spring. Principal component analysis with multiple linear regression (PCA/MLR) illustrated that crustal dust, pesticide, and industrial emissions contributed to 73.6% of the total contribution sources, while vehicle exhaust mixed with coal combustion accounted for 64.1% of the total contribution sources. The health risk assessments suggested that As (HQ = 4.7) and Cd (HQ = 3.1) had non-carcinogenic risks for adults. The cumulative carcinogenic risk of elements was within the acceptable range for both children and adults. Notably, the source of As should be paid attention to as the As high concentration exceeding the safe level for non-carcinogenic risks in the study area.
    Keywords autumn ; carcinogenicity ; coal ; combustion ; dust ; environmental assessment ; human health ; humans ; particulates ; pesticides ; pollution ; principal component analysis ; regression analysis ; risk ; spring ; suburban areas ; winter ; Vietnam
    Language English
    Dates of publication 2022-0421
    Size p. 433-454.
    Publishing place Taylor & Francis
    Document type Article
    ISSN 1549-7860
    DOI 10.1080/10807039.2022.2056872
    Database NAL-Catalogue (AGRICOLA)

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