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首页> 外文期刊>Ocean & coastal management >Assessment of groundwater vulnerability to nonpoint source pollution in a Mediterranean coastal zone (Mersin, Turkey) under conflicting land use practices
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Assessment of groundwater vulnerability to nonpoint source pollution in a Mediterranean coastal zone (Mersin, Turkey) under conflicting land use practices

机译：在冲突的土地使用方式下评估地中海沿岸地区（土耳其梅尔辛）对面源污染的地下水脆弱性

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摘要

Groundwater resources of the Tarsus coastal plain (Mersin, Turkey) are being exploited heavily for a variety of purposes and they are under a serious threat from nonpoint source pollution from the conflicting land use practices and saltwater intrusion due to overpumping. In this study, vulnerability of groundwater to nonpoint source pollution was assessed using CIS techniques and employing both Generic and Pesticide DRASTIC models. Calculated vulnerability indices ranged between 68-206 and 69 -236 for Generic and Pesticide DRASTIC, respectively. Areas lying between "moderately high" to "high" vulnerability categories extend along the coastline in areas covered by the recent Eolian sand dunes where saltwater intrusion is prevalent. The "low" vulnerability category is restricted to a small portion of the area in the NW, and it is represented by poorly drained soils with topographic gradients above 18%. A sizeable portion of the area was classified into "moderately low" to "moderate" vulnerability category, which is typified by low topographic gradients (<2%) and fairly uniform distributions of hydraulic conductivity, net recharge and depth to water table. The validation of the DRASTIC models was accomplished through pairwise comparison of DRASTIC vulnerability maps (using Pearson's r correlation coefficient) with a total of 18 raster layers representing original DRASTIC input data, land use/land cover (LULC) features, and groundwater Cl~- and NO_3~- data. Results from the correlation analysis indicate a significant association between high groundwater NO_3~- concentrations and distances from certain LULC types, including open-field farms, citrus orchards, industrial complexes, and residential buildings.
机译：塔鲁斯沿海平原（土耳其梅尔辛）的地下水资源被广泛用于各种目的，并且由于冲突的土地使用习惯和过度抽水造成的盐水入侵，它们受到非点源污染的严重威胁。在这项研究中，使用CIS技术以及通用和农药DRASTIC模型评估了地下水对面源污染的脆弱性。对于通用和农药DRASTIC，计算得出的脆弱性指数分别在68-206和69 -236之间。在脆弱程度介于“中高”到“高”之间的地区，沿海岸线延伸，最近被咸水入侵的风神沙丘覆盖。 “低”脆弱性类别仅限于西北地区的一小部分，其特征是排水不畅，地形梯度大于18％的土壤。该地区相当大的一部分被分为“中等偏低”到“中等”脆弱性类别，典型特征是地形坡度低（<2％），并且水力传导率，净补给量和地下水位的深度相当均匀。 DRASTIC模型的验证是通过将DRASTIC脆弱性图（使用Pearson r相关系数）与总共18个代表原始DRASTIC输入数据，土地利用/土地覆盖（LULC）特征以及地下水Cl〜-和NO_3〜-数据。相关分析的结果表明，地下水中NO_3〜-的高浓度与距某些LULC类型的距离之间存在显着相关性，包括露天农田，柑桔园，工业园区和住宅建筑。

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  • 来源
    《Ocean & coastal management》 |2013年第1期|141-152|共12页
  • 作者

    Cueneyt Gueler; Mehmet Ali Kurt; Resit Nabi Korkut;

  • 作者单位

    Mersin UEniversitesi, Ciftlikkoey Kampuesue, Jeoloji Muehendisligi Boeluemue, 33343 Mersin, Turkey;

    Mersin UEniversitesi, IIeri Teknoloji Egitim Arastirma ve Uygulama Merkezi, Ciftlikkoey, 33343 Mersin, Turkey;

    Mersin UEniversitesi, Ciftlikkoey Kampuesue, Jeoloji Muehendisligi Boeluemue, 33343 Mersin, Turkey;

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