Groundwater-derived nutrient inputs to the Upper Gulf of Thailand

Burnett, William C.; Wattayakorn, Gullaya; Taniguchi, Makoto; Dulai, Henrietta; Sojisuporn, Pramot; Rungsupa, Sompop; Ishitobi, Tomotoshi

doi:10.1016/j.csr.2006.09.006

Cited by 100 publications

(35 citation statements)

References 27 publications

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“…7f), the ratio of the average dissolved inorganic nitrogen (NO 3 À þ NH 4 þ ) and inorganic PO 4 concentrations (DIN:PO 4 ratio) in the SGD is found to be 50. Note that DOP and DON can also be quantitatively important in groundwater and can affect ratios of total N:total P in SGD (Burnett et al, 2007). Table 4 shows the nutrient discharge rates extrapolated over the entire length of the shoreline along the valley (210 m; Mulligan and Charette, 2006), as well as the normalized fluxes per unit seepage area, assuming a beachface seepage width of 0.8 m. Up to 95% of the total DIN flux (2.9 Â 10 À4 mol s À1 ) is in the form of NO 3…”

Section: Sgd Of Nutrientsmentioning

confidence: 99%

Flow and nutrient dynamics in a subterranean estuary (Waquoit Bay, MA, USA): Field data and reactive transport modeling

Spiteri¹,

Slomp²,

Charette³

et al. 2008

Geochimica et Cosmochimica Acta

138

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A two-dimensional (2D) reactive transport model is used to investigate the controls on nutrient (NO 3 À , NH 4 þ , PO 4 ) dynamics in a coastal aquifer. The model couples density-dependent flow to a reaction network which includes oxic degradation of organic matter, denitrification, iron oxide reduction, nitrification, Fe 2+ oxidation and sorption of PO 4 onto iron oxides. Porewater measurements from a well transect at Waquoit Bay, MA, USA indicate the presence of a reducing plume with high Fe 2+ , NH 4 þ , DOC (dissolved organic carbon) and PO 4 concentrations overlying a more oxidizing NO 3 À -rich plume. These two plumes travel nearly conservatively until they start to overlap in the intertidal coastal sediments prior to discharge into the bay. In this zone, the aeration of the surface beach sediments drives nitrification and allows the precipitation of iron oxide, which leads to the removal of PO 4 through sorption. Model simulations suggest that removal of NO 3 À through denitrification is inhibited by the limited overlap between the two freshwater plumes, as well as by the refractory nature of terrestrial DOC. Submarine groundwater discharge is a significant source of NO 3 À to the bay.

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Section: Sgd Of Nutrientsmentioning

confidence: 99%

Flow and nutrient dynamics in a subterranean estuary (Waquoit Bay, MA, USA): Field data and reactive transport modeling

Spiteri¹,

Slomp²,

Charette³

et al. 2008

Geochimica et Cosmochimica Acta

138

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show abstract

“…The Gulf of Thailand covers roughly 320 000 km² and is relatively shallow (mean depth is 45 m, and the maximum depth is 80 m). This makes for a slow water exchange, and the strong water outflow from the rivers makes the Gulf low in salinity and rich in sediments (Burnetta et al, 2007). The decrease in sediment yield, natural land subsidence, sea level rise, and the impacts from waves and storms, all combined to cause the coastal problems in the Gulf of Thailand.…”

Section: Study Area and Study Sitesmentioning

confidence: 99%

Applicability of Microfinance for Adaptation to Sea Level Rise Impacts

Kulpraneet¹

2017

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The aim of this study is to study the applicability of hypothetical microfinance for household adaptation to sea level rise impacts at community level. The study examines two hypothesis: 1) microfinance can (cannot) be applied as an adaptive measure to the impacts of sea level rise; 2) whether or not the factors of risk perceptions, attitudes, social references, microfinance conditions, government supports, and demographic influence an individual participation to a designed microfinance. The study sites are six vulnerable coastal villages located in the Gulf of Thailand. A designed microfinance for adaptation to sea level rise impacts is assumed in hypothetical market and tested with residents in the villages. Acceptance analysis, Pearson correlation, and stepwise regression analysis are used to test the hypothesis of the study.The study results reveal that microfinance can be applied for household adaptation to sea level rise impacts at community level. However, there are some correlated factors that affect individual participation to the designed microfinance. The likelihood of successful implementation of microfinance for the adaptation purposes is depended on how those factors affecting participation are properly addressed by implementer.

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“…It is remarkable for careful observation when flow velocity increased up to 377 m 3 /s that trends of BOD and DO looked the same downslope due to much more rainwater of heavy rainstorm is usually plenty of DO and also increasing BOD in stream water. For this reason, the decrease of DO because it was used for bacterial organic digestion process that made BOD lowering as well but interesting point was on the city zone in terms of urban rainwater in city zone being composed of DO while drastic increases of BOD was occurred by erosion process due to much more excessive rainwater on the ground surface with very less infiltration rate (Cazelles et al, 1991;Loomis et al, 2000;Burnett et al, 2007;Chen et al, 2008;Liu et al, 2009;Chu et al, 2010;LERD, 2012;Mangimbulude et al, 2012;Rakthai, 2012;Kraus et al, 2014).…”

Section: Dilution Process and Handling Watermentioning

confidence: 99%

“…Consequently, the household wastewater cannot be avoided to drain directly into river without any treatment technology that caused the water pollution in stream in situ of non-living things one way or another (Burnett et al, 2007;Wang et al, 2010). Lack of water consumption could be pronounced on waterworks, irrigation, industry, sea water intrusion, and recreation (Wang et al, 1978;Vagnetti et al, 2003;Wahla & Kirkham, 2008).…”

Section: Introductionmentioning

confidence: 99%

Handling Water through Irrigation Watershed Management for Coping with Stream Pollution Dilution in Phetchaburi River, Thailand

Vorovong¹,

Chunkao²,

Baulert³

2014

MAS

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The research was aimed to find means how to handle water at Phetchaburi diversion dam for coping with stream pollution in Phetchaburi River through irrigation watershed management. There eight sampling points for collecting water samples since the year of 2002 to 2013 for analyzing water quality in relation to release water flow in consecutive velocity of 22.4, 100, and 377 m 3 /s in order to obtain the better diluted stream water. Accordance with the same trends of water quality indicators, this study was taken in BOD and DO as the representatives for determining the role of flow velocity in dilution capability. The results found that the BOD were gradually decreased from Phetchaburi diversion dam all the way to agricultural zone and jumping up during passing the city zone, and still jumping up in estuarine zone. Whenever the BOD decreases, the DO values were also decreased because of bacterial organic digestion process occurring while it flows except very high flow velocity. The flow velocity not more than 30 m 3 /s is recommended to release from Phetchaburi diversion dam for eliminating stream pollution by dilution process.

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Groundwater-derived nutrient inputs to the Upper Gulf of Thailand

Cited by 100 publications

References 27 publications

Flow and nutrient dynamics in a subterranean estuary (Waquoit Bay, MA, USA): Field data and reactive transport modeling

Flow and nutrient dynamics in a subterranean estuary (Waquoit Bay, MA, USA): Field data and reactive transport modeling

Applicability of Microfinance for Adaptation to Sea Level Rise Impacts

Handling Water through Irrigation Watershed Management for Coping with Stream Pollution Dilution in Phetchaburi River, Thailand

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