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首页> 外文期刊>Estuarine Coastal and Shelf Science >Submarine groundwater discharge and associated nutrient fluxes to Discovery Bay, Jamaica
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Submarine groundwater discharge and associated nutrient fluxes to Discovery Bay, Jamaica

机译：向牙买加愉景湾的海底地下水排放和相关养分通量

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Submarine groundwater discharge (SGD) and associated fluxes of nutrients were investigated in Discovery Bay, Jamaica during the early 2000's. The flow of water discharging from submerged springs was measured using hand-held flow meters while diffuse seepage was evaluated using Lee-type seepage meters. Concentrations of ammonium, nitrate+nitrite, soluble reactive phosphorus (SRP) and total dissolved nitrogen and phosphorus were measured in bay waters as well as waters emerging from submarine springs and as diffuse seepage. The dominant nitrogen and phosphorus species in the SGD and bay waters were dissolved inorganic nitrogen (DIN = NH4+ + NO3- + NO2-) and SRP, but varying levels of organic nitrogen and phosphorus were detected. Significant amounts of SGD were detected in Discovery Bay which was enriched in nitrogen relative to phosphorus with N:P ratios typically greater than 100. SGD, via flow from 63 submarine springs, was estimated at between 9 and 19 x 10(3) m(3) d(-1) with associated nutrient fluxes of 160-780 mol N d(-1) and 0.4-7.0 mol P d(-1). Diffuse seepage rates were highly variable across the bay and ranged from 0 to 1.2 m d(-1) leading to seepage nutrient fluxes of up to 17.7 mmol N d(-1) m(-2) and 0.25 mmol P d(-1) m(-2). Seasonal variations and the implications of these fluxes on the nearshore coral reef system are discussed. This study provides the first reported estimates of SGD nitrogen and phosphorus fluxes to a karst-dominated small island developing state in the Caribbean.
机译：在2000年代初期，在牙买加的愉景湾调查了海底地下水排放（SGD）和相关的养分通量。使用手持式流量计测量浸入水中的水的流量，同时使用Lee型渗漏仪评估扩散渗漏。在海湾水以及从海底泉水涌出的水和弥漫性渗漏中，测量了铵，硝酸盐+亚硝酸盐，可溶性反应性磷（SRP）以及总溶解氮和磷的浓度。在SGD和海湾水域中，氮和磷的主要种类是溶解的无机氮（DIN = NH4 + + NO3- + NO2-）和SRP，但检测到的有机氮和磷含量不同。在愉景湾发现大量的SGD，其中N：P比通常大于100的磷相对于氮富集。通过来自63个海底泉水的SGD估计为9至19 x 10（3）m（ 3）d（-1），相关养分通量为160-780 mol N d（-1）和0.4-7.0 mol P d（-1）。整个海湾的扩散渗透率变化很大，范围从0到1.2 md（-1），导致养分通量高达17.7 mmol N d（-1）m（-2）和0.25 mmol P d（-1） m（-2）。讨论了季节性变化及其对近岸珊瑚礁系统的影响。这项研究首次报道了到加勒比海以喀斯特为主的小岛发育国家的SGD氮和磷通量。

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