Composition and fluxes of submarine groundwater along the Caribbean coast of the Yucatan Peninsula

Null, K. A.; Knee, Karen L.; Crook, Elizabeth D.; Sieyes, Nicholas R. de; Rebolledo-Vieyra, M.; Hernández-Terrones, Laura; Paytan, Adina

doi:10.1016/j.csr.2014.01.011

Cited by 92 publications

(65 citation statements)

References 69 publications

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“…While nitrate inputs are usually linked to agriculture, phosphorus inputs can be linked to tourism, as their main source is domestic sewage [64]. However, this karst system is characterized by delayed groundwater discharge [42], and a lag may exist before peak discharge of groundwater and nutrients to the coast occurs [46]. In our results, we observed important phytoplankton blooms in the Holbox-Río Lagarto area since 19 to 24 April.…”

Section: Discussionsupporting

confidence: 62%

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Mapping Satellite Inherent Optical Properties Index in Coastal Waters of the Yucatán Peninsula (Mexico)

et al. 2018

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Abstract:The Yucatán Peninsula hosts worldwide-known tourism destinations that concentrate most of the Mexico tourism activity. In this region, tourism has exponentially increased over the last years, including wildlife oriented tourism. Rapid tourism development, involving the consequent construction of hotels and tourist commodities, is associated with domestic sewage discharges from septic tanks. In this karstic environment, submarine groundwater discharges are very important and highly vulnerable to anthropogenic pollution. Nutrient loadings are linked to harmful algal blooms, which are an issue of concern to local and federal authorities due to their recurrence and socioeconomic and human health costs. In this study, we used satellite products from MODIS (Moderate Resolution Imaging Spectroradiometer) to calculate and map the satellite Inherent Optical Properties (IOP) Index. We worked with different scenarios considering both holiday and hydrological seasons. Our results showed that the satellite IOP Index allows one to build baseline information in a sustainable mid-term or long-term basis which is key for ecosystem-based management.

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Section: Discussionsupporting

confidence: 62%

“…Particularly, small farms in the livestock sector generate more important direct outputs into the aquifer without treatment than larger farms [41,45]. The connectivity of submarine groundwater discharge to the nearshore coastal environment is an important impact for coastal water quality [46][47][48].…”

Section: Case Study Regionsmentioning

confidence: 99%

Mapping Satellite Inherent Optical Properties Index in Coastal Waters of the Yucatán Peninsula (Mexico)

et al. 2018

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“…Current studies on coastal carbonate aquifers throughout the world are undertaken in aquifers with lower nitrate concentrations than those of the Daweijia area. For example, NO 3 − concentrations are less than 265 mg/L in groundwater from carbonate aquifers along the Mediterranean coast (Schiavo et al, 2006;Ghiglieri et al, 2012), less than 80 mg/L along the Gulf of Mexico (Andrews, 1994;Katz, 2004;Katz et al, 2004), and less than 20 mg/L along the Caribbean coast (Mutchler et al, 2007;Young et al, 2008;Null et al, 2014). In the coastal carbonate aquifer of the Daweijia area, NO 3 − concentrations are characterized by high values reaching 521 mg/L.…”

Section: Introductionmentioning

confidence: 99%

Residence times of groundwater and nitrate transport in coastal aquifer systems: Daweijia area, northeastern China

Han

Cao

McCallum

et al. 2015

Science of The Total Environment

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• Examine high nitrate contents in the coastal carbonate aquifer of northeast China • Estimate renewal rates and mean residence times of groundwater in coastal aquifers • Evaluate the relation between groundwater age distribution and nitrate transport • Propose potential pollution patterns of nitrate distribution in the coastal aquifer • Identify anthropogenic input mainly responsible for increasing groundwater salinity a b s t r a c t a r t i c l e i n f o H and CFCs methods were applied to provide a better understanding of the relationship between the distribution of groundwater mean residence time (MRT) and nitrate transport, and to identify sources of nitrate concentrations in the complex coastal aquifer systems. There is a relatively narrow range of isotopic composition (ranging from − 8.5 to − 7.0‰) in most groundwater. Generally higher tritium contents observed in the wet season relative to the dry season may result from rapid groundwater circulation in response to the rainfall through the preferential flow paths. In the well field, the relatively increased nitrate concentrations of groundwater, accompanied by the higher tritium contents in the wet season, indicate the nitrate pollution can be attributed to domestic wastes. The binary exponential and piston-flow mixing model (BEP) yielded feasible age distributions based on the conceptual model. The good inverse relationship between groundwater MRTs (92-467 years) and the NO 3 − concentrations in the shallow Quaternary aquifers indicates that elevated nitrate concentrations are attributable to more recent recharge for shallow groundwater. However, there is no significant relationship between the MRTs (8-411 years) and the NO 3 − concentrations existing in the carbonate aquifer system, due to the complex hydrogeological conditions, groundwater age distributions and the range of contaminant source areas. Nitrate in the groundwater system without denitrification effects could accumulate and be transported for tens of years, through the complex carbonate aquifer matrix and the successive inputs of nitrogen from various sources.

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“…Several studies describe the transport of nutrients towards the ocean in tropical karstic regions as in northwest Yucatan (Mexico) (Hanshaw and Back 1980;Herrera-Silveira 1998;Young et al 2008;Null et al 2014), Bermuda 10 (Lapointe and O'Connell 1989;Simmons and Lyons 1994), Barbados (Lewis 1987) and Guam (Redding et al 2013). …”

Section: Introductionmentioning

confidence: 99%

Timing of land–ocean groundwater nutrient fluxes from a tropical karstic region (southern Java, Indonesia)

Oehler

Eiche

Putra

et al. 2017

Preprint

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Abstract. 10In tropical karstic regions, knowledge about the timing and quantity of land-ocean groundwater nutrient fluxes is important, as those nutrients may affect coastal ecosystems and contaminate coastal springs. High aquifer permeability of the karst, combined with high recharge and discharge during heavy rain events, leads to a close connectivity between groundwater in the hinterland and the coastal zone. The alteration between drier periods and heavy rain events can lead to a high temporal variability of groundwater discharge associated nutrient fluxes from the 15 hinterland towards the coastal. We studied the timing of land-ocean groundwater nutrient fluxes in the tropical karstic region of Gunung Kidul (southern Java Indonesia) from November 2015 until December 2016. Satellite infrared imagery revealed two major areas of direct submarine and coastal groundwater discharge. δ 18 O and δD signatures, nutrient concentrations, combined with precipitation and groundwater discharge data, indicate a rapid groundwater recharge and transport from the catchment area towards the coastal ocean. Measured groundwater 20 discharge rates varied from less than 1 m³/s up to 16.6 m³/s and were dominantly controlled by recharge in the hinterland and surface infiltration during the rainy season. Nitrate fluxes ranged from 5 x 10 3 to 139 x 10 3 mol/day and DSi fluxes from 50 x 10 3 to 310 x 10 3 mol/day. High nitrate concentrations coinciding with phases of high discharge lead to particularly high nitrate fluxes. This counterintuitive temporal connection might be due to fertilization during the onset of the wet season and the retention of nutrients from untreated sewage in the soil and in 25 sinkholes during dryer periods, which are then washed into the aquifer during heavy rain events. In the tropical karstic region of southern Java, extraordinarily high land-ocean nutrient fluxes occur therefore during the onset of periods with high discharge, which makes coastal water and coastal springs prone to contamination during this time, while flood recession and dry periods are characterized by lower nutrient fluxes. In tropical karstic regions the timing of land-ocean groundwater nutrient fluxes is thus highly variable, which may lead to ecological implications. High 30 nutrient fluxes during certain times of the year may explain the sudden occurrence of harmful algae blooms in coastal environments and have to be considered in coastal groundwater management.

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Composition and fluxes of submarine groundwater along the Caribbean coast of the Yucatan Peninsula

Cited by 92 publications

References 69 publications

Mapping Satellite Inherent Optical Properties Index in Coastal Waters of the Yucatán Peninsula (Mexico)

Mapping Satellite Inherent Optical Properties Index in Coastal Waters of the Yucatán Peninsula (Mexico)

Residence times of groundwater and nitrate transport in coastal aquifer systems: Daweijia area, northeastern China

Timing of land–ocean groundwater nutrient fluxes from a tropical karstic region (southern Java, Indonesia)

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