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Evaluation of groundwater contamination in a coastal area of south-eastern Sicily

机译:西西里东南部沿海地区的地下水污染评估

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This investigation was under taken to evaluate the groundwater resources contamination due to intensive agricultural practices (particularly greenhouses). The study-area is located in the coastal area of the Ragusa province (South-East Sicily), where numerous existing greenhouses may cause the contamination of groundwater systems (unconfined and confined aquifers) beneath the cropped land. The pollution risk is mainly related with the seepage process of macro-elements nitrogen (N), phosphorus (P), potassium (K), held in the irrigation water and the massive use of fertilizers and pesticides, that may pass through the unsaturated zone of the soil profile. Moreover, the area is characterized by the presence of several wells (about 15 wells/km2) for agricultural use that cause the aquifer overexploitation and the consequent risk of seawater intrusion. The agriculture practices adopted in the study area (irrigation volumes, fertilizer concentrations, use of pesticides…) were monitored since February 2009; moreover, the pollution risk of the aquifers was evaluated through the analysis of groundwater water samples collected (monthly) in the monitoring wells; in particular, nitrogen compounds, soluble phosphorous (PO4 −−), potassium, as well as the main pesticides commonly used in the study area, were measured.The results show that electrical conductivity and chloride concentration values can cause reduction of production and leaf damage problems, respectively, for most of the monitored farm systems. The high nitrogen compounds concentrations observed in the monitored wells can cause health and environmental problems. Moreover high pesticide contamination of groundwater was found in two of the five monitored wells.
机译:正在进行这项调查,以评估由于集约化农业实践(特别是温室)引起的地下水资源污染。该研究区域位于拉古萨省(西西里岛东南部)的沿海地区,那里大量现有的温室可能会污染耕地下方的地下水系统(无侧限和承压含水层)。污染风险主要与灌溉水中所含的氮,磷,钾的大量渗漏过程以及可能穿过非饱和区的化肥和农药的大量使用有关。的土壤剖面。此外,该地区的特点是存在几口井(约15井/ km 2 )用于农业用途,这会引起含水层的过度开采和随之而来的海水入侵的风险。自2009年2月以来,对研究区域采用的农业做法(灌溉量,肥料浓度,农药使用情况)进行了监测;此外,通过对监测井(每月)收集的地下水样品进行分析,评估了含水层的污染风险;特别是,测量了氮化合物,可溶性磷(PO 4 — ),钾以及研究区域常用的主要农药结果表明,对于大多数受监视的农场系统,电导率和氯化物浓度值分别会导致产量减少和叶片受损问题。在监测井中观察到的高氮化合物浓度会导致健康和环境问题。此外,在五个监测井中的两个中发现了高农药污染的地下水。

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    University of Catania, Department of Agro-food and Environmental System Management, Catania;

    Regional Agency for Environmental Protection, Sicily, Department of Ragusa, Ragusa;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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  • 入库时间 2022-08-18 00:57:58

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