Abstract
This study was conducted to assess the water quality affected by different land use patterns in U Minh Ha National Park, Ca Mau, Vietnam. This study determined the water quality characteristics in three land use types (Acacia hybrid, planted melaleuca cajuputi, and natural melaleuca cajuputi) at different plant ages on two acid sulfate soil layers in the rainy season (8/2018) and dry season (4/2019) using nine water quality parameters. Multivariate statistical analyses were applied to evaluate the correlation and spatial and temporal variations in the water quality. The study results showed that the water quality in S-ASS was more polluted than that in D-ASS, characterized by low pH; the EC, organic matters (BOD and COD), nutrients (N-NH4+ and N-NO3−), and metal ions (Al3+ and Fe3+) were high; and the EC, BOD, COD, Al3+, and N-NO3− were determined high in D-ASS. The NMC area was noted to have high concentrations of organic matters and nutrients, while the factors specific to acidic soil were found to be higher in the AH and PMC areas. The water quality in the rainy season tended to be more polluted than that in the dry season. The cluster analysis grouped the land use patterns on S-ASS and D-ASS in both seasons into four groups, with a clear similarity between the wet and dry seasons in the areas at various plant ages. The seasonal variations of the water quality of the three land use types were distinguished by the main parameters, including pH, EC, BOD, N-NO3−, and Al3+ (S-ASS) and EC, BOD, N-NO3−, N-NH4+, and Fe3+ (D-ASS). Therefore, there is a need for better water management measures in the rainy season and focus on the key parameters causing water quality variations in each area. The findings in this study provided important information for the future water quality monitoring for both agricultural production and conservation in the national park.
Highlights
Wetlands play an important role in the biodiversity and function of ecosystems
The shallow acid sulfate soil (S-acid sulfate soils (ASS)) planted with Acacia hybrid and Melaleuca cajuputi were both identified as acidic, which was lower than that of the deep acid sulfate soil (D-ASS) in both areas
The results of this study indicated that the water quality in the water bodies in the S-ASS tended to be more polluted than that in the D-ASS
Summary
Wetlands play an important role in the biodiversity and function of ecosystems. A wetland ecosystem is very useful in regulating the climate, filtering harmful substances, ensuring biodiversity, food sources, and creating a livelihood for the surrounding communities [1,2,3,4]. Social and economic developments have put pressure on wetland ecosystems [4,5] This has resulted in the total wetland area in the world rapidly decreasing [6]. Pearson’s correlation, cluster analysis (CA), and discriminant analysis (DA) are efficiently used in spatial and temporal analyses and correlations among water quality parameters. The former studies have shown that these methods are appropriate in determining the spatial and temporal variations of water quality influenced by different natural and human factors [16,17]. This research was carried out to elaborate the land use activities in wetland areas, resulting in physical and chemical water quality changes
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
