Province-based self-remediation efficiency of the Tha Chin river basin, Thailand

Thaipichitburapa, Patrawut; Meksumpun, Charumas; Meksumpun, Shettapong

doi:10.2166/wst.2010.293

Cited by 10 publications

(5 citation statements)

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“…River discharge. Strong precipitation increased river discharge from the SWM to early NEM, induced high nutrient loads (Thaipichitburapa et al, 2010;Yuenyong et al, 2019), decreased ocean salinity (Buranapratheprat et al, 2002;Yu et al, 2018), and enhanced surface stability (Buranapratheprat et al, 2008;Yu et al, 2018). The blooms of all phytoplankton groups, particularly GN in the SWM and DN>60% in the NEM (Figure 7), responded to the increase in anthropogenic nutrients.…”

Section: Seasonal Variability Of Green Noctiluca and Other Red Tidesmentioning

confidence: 97%

MODIS-derived green Noctiluca blooms in the upper Gulf of Thailand: Algorithm development and seasonal variation mapping

Luang-on

Ishizaka²,

Buranapratheprat³

et al. 2023

Front. Mar. Sci.

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In recent decades, red tides of non-toxic harmful algal blooms have frequently occurred in monsoon-influenced tropical areas, particularly the green form of Noctiluca scintillans (hereafter green Noctiluca). However, our understanding of the mechanism of red tide formation is hindered by spatial and temporal constraints of field data. In this study, we used moderate resolution imaging spectroradiometer (MODIS) ocean color data along with a locally developed algal-bloom classification algorithm to investigate the seasonal variability of dominant red tides across the upper Gulf of Thailand (uGoT). During our July 2018 observation, a super green Noctiluca bloom with extraordinarily high chl-a (>1,469 mg m-3) displayed a distinct spectral reflectance characteristic among red tides in blue-to-green and red-to-near infrared wavelengths. According to the distinctive in situ hyperspectral characteristics of uGoT algal blooms, we developed a classification algorithm for MODIS normalized at 488, 531, and 667 nm, which successfully discriminated green Noctiluca in three levels of blooms, namely, super (100%), strong (>80%), and weak (>40%), from other algal blooms (i.e., dinoflagellates, diatoms, cyanobacteria, and mixed red tide species) as well as non-bloom oceanic and coastal waters using MODIS data, as confirmed by uGoT red tide reports. Monthly MODIS-based discrimination composites from 2003 to 2021 revealed seasonal variability in the surface distribution and bloom frequency of green Noctiluca and other red tides according to the Asian monsoon seasons: the southwest monsoon (May–September) and the northeast monsoon (October–January of the following year). Green Noctiluca blooms occurred farther from the shore and estuaries than other red tides (dinoflagellates and cyanobacteria), and were much more frequent than other red tides between the Tha Chin and Chao Phraya River mouths during the non-monsoon period (February to April). The frequency and distribution of green Noctiluca blooms, as well as other algal blooms, varied with the monsoon season. By comparing MODIS-derived algal blooms to monsoon-induced factors (i.e., sea surface winds, precipitation, and river discharge), we present an unprecedented overview of the spatial and temporal dynamics of red tides throughout the uGoT under Asian monsoon conditions. This research contributes to our understanding of the impact of climate change on phytoplankton dynamics.

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Section: Seasonal Variability Of Green Noctiluca and Other Red Tidesmentioning

confidence: 97%

MODIS-derived green Noctiluca blooms in the upper Gulf of Thailand: Algorithm development and seasonal variation mapping

Luang-on

Ishizaka²,

Buranapratheprat³

et al. 2023

Front. Mar. Sci.

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“…Actually, wetland is occurred between the terrestrial and aquatic systems in order to absorb the toxic contaminants by humus, organic matters, and soils before draining away to stream or river. Aquatic plant has eventually to remove contaminants from wastewater and soils as growing units through root system under the osmotic pressure during the photosynthesis processing, then the elements are translocated to accumulate in all parts of vegetative organ, but it depends on the degree of toxic chemical contaminants and aquatic plant species (Tateuyama et al, 1967;Reddy et al, 1990;Rai et al, 1994;De Souza et al, 1999;Marin and Ayele, 2003;Pulford and Watson, 2003;Xia and Ma, 2006;Gupta and Sinha, 2007;Wahla et al, 2008;Thaipichitburapa et al, 2010;Zaier et al, 2010;Chunkao et al, 2012).…”

Section: Vfcw Filtration Of Toxic Chemicalsmentioning

confidence: 99%

H.M. The King's Royally Initiated LERD Project on Community Wastewater Treatment through Small Wetlands and Oxidation Pond in Phetchaburi, Thailand

Chunkao¹,

Tarnchalanukit²,

Prabuddham³

et al. 2014

MAS

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The research on community wastewater treatment through small aquatic-planting and grass-filtration constructed wetland in cooperating with oxidation ponds is aimed to establish demonstration models for eliminating organic contaminants under nature-by-nature process, simple technology and less expenses. There have been 7 small wetlands on 100-m x 5-m x 0.75-m small vertical flow construction wetlands (VFCW), 7 small wetlands on 25-m x 5-m x 0.75-m small VFCW in cooperating with zero discharge, 2 experimental plots of planted mangrove forest and 5-consecutive oxidation ponds plus 3 herbivore fishes per square meter.For research operation, some municipal wastewater were pumped about 0.025-cms flow rate from Phetchaburi collected pond through 18.5-km HPDE pipe with separating receivers: firstly, to small grass and aquatic planted wetlands; secondly, to small constructed wetlands; thirdly, to the planted mangrove forest; and finally to the 5-consecutive ponds in descending order of 20 cm by beginning the depth of 2.6 m at the first pond (sedimentation pond) till 1.8 m at the last pond, In basic principles, an influent has to flow continuously at height of one-third depth below surface of oxidation pond on hydraulic retention time (HRT), then flowing over weir crest about 5 cm. The effluent of each oxidation pond was monthly sampled for analyzing the water quality in order to estimate the efficiency of wastewater treatment. In the same procedures, the effluent from small wetlands as grown by aquatic plants as well as zero discharge had to collect for water quality analysis. The results found the wastewater treatment efficiency above 60 percentages for COD, BOD, and TSS. The usable life of plants for maximum wastewater treatment efficiency were specified at 90 days and 45 days for aquatic plants (Typha angustifolia Linn. and Cyperus corymbosus Rottb.), respectively. It was noticed that small wetland and oxidation pond were suitable for community wastewater treatment and gained benefits from the wastewater treatment system.

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“…They play important roles in degrading and removing nutrients and other pollutants (Cui et al, 2010). Aquatic plant has eventually to remove contaminants from wastewater and soils as growing units through root system under the osmotic pressure during the photosynthesis processing, then the elements are translocated to accumulate in all parts of vegetative organ, but it depends on the degree of toxic chemical contaminants and aquatic plant species (Tateuyama et al, 1967;Reddy et al, 1990;Rai et al, 1994;De Souza et al, 1999;Marin and Ayele, 2003;Pulford and Watson, 2003;Xia and Ma, 2006;Gupta and Sinha, 2007;Wahla et al, 2008;Thaipichitburapa et al, 2010;Zaier et al, 2010;Chunkao et al, 2012 However, efficiency…”

Section: Introductionmentioning

confidence: 99%

Choosing Aquatic Plant Species for High Wastewater Treatment Efficiency through Small Wetland

Phewnil¹,

Chunkao²,

Pattamapitoon³

et al. 2014

MAS

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The research was aimed to choose the most appropriate aquatic plant in high capacity as grown in small wetland for community wastewater treatment, they were Typha angustifolia Linn., Cyperus corymbosus Rottb., and Canna indica Linn. The small wetland, sometimes called vertical flow constructed wetland (VFCW), has been designated on 100-m long, 5-m wide and 0.75-m deep in size in which four-hole pipes were laid down at the bottom for releasing some treated wastewater as effluent through the outlet to the storage reservoir. There must be paved the gravel on the bottom up to the level of 5-cm height and overtopping with sand about 15 cm that be followed by 30-cm mixed soil (soil: sand equivalent to 3:1). All selected aquatic plant species were planted in small wetland before flowing community wastewater until soil at saturated level for first week and about 30 cm during second week up to the maximum age of plants. The choosing aquatic plant species were only depended on the high efficiency of wastewater treatment. The most probable aquatic plant was selected on Typha as the first priority for high wastewater treatment efficiency, Canna the second, and more or less efficiency for the others. Fortunately, Typha has been grown well in everywhere, particularly flat wetland in central, west, east and down north of Thailand.

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Province-based self-remediation efficiency of the Tha Chin river basin, Thailand

Cited by 10 publications

References 0 publications

MODIS-derived green Noctiluca blooms in the upper Gulf of Thailand: Algorithm development and seasonal variation mapping

MODIS-derived green Noctiluca blooms in the upper Gulf of Thailand: Algorithm development and seasonal variation mapping

H.M. The King's Royally Initiated LERD Project on Community Wastewater Treatment through Small Wetlands and Oxidation Pond in Phetchaburi, Thailand

Choosing Aquatic Plant Species for High Wastewater Treatment Efficiency through Small Wetland

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