Linking Benthic Macroinvertebrates and Physicochemical Variables for Water Quality Assessment in Saigon River and Its Tributaries, Vietnam

1st International Conference on Advances in Environmental Engineering

生态环境科学

Pham, A.D.^1

Faculty of Environment and Labour Safety, Ton Duc Thang University, Ho Chi Minh City, Viet Nam^1

关键词: Benthic macroinvertebrates;    Correlation analysis;    Environmental variables;    Mekong river commissions;    Multi variate analysis;    Potential indicators;    Water quality assessments;    Water quality variables;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/92/1/012053/pdf
DOI  :  10.1088/1755-1315/92/1/012053

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The benthic macroinvertebrates living on the bottom channels are one of the most promising of the potential indicators of river health for the Saigon River and its tributaries with hydrochemistry playing a supporting role. An evaluation of the interrelationships within this approach deems necessary. This work identified and tested these relationships to improve the method for water quality assessment. Data from over 4,500 km2watershed were used as a representative example for the Saigon River and its tributaries. The data covered the period March and September, 2007, 2008, 2009, 2010 and 2015. To implement this evaluation, the analyses were based on accepted the methodology of Mekong River Commission and the studies of scientific group for the biological status assessment. For correlation analyses, the selected environmental variables were compared with the ecological indices, based on benthic macroinvertebrates. The results showed that the metrics of Species Richness, H', and 1-DShad significant and strong relationships with the water quality variables of DO, BOD5, T-N, and T-P (R2= 0.3751 - 0.8866; P 2= 0.0000 - 0.0744; P > 0.05). Additionally, the metrics of Species Richness, H', and 1-DShad negatively correlated with the pH and TSS. Both univariate and multivariate analyses were used to examine the ecological quality of the Saigon River and its tributaries using benthic macroinvertebrates seems to be the most sensitive indicator to correlate with physicochemical variables. This demonstrated that it could be applied to describe the water quality in the Saigon River and its tributaries.