• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Groundwater-risk analysis of New York utilizing GIS technology.
【24h】

Groundwater-risk analysis of New York utilizing GIS technology.

机译：利用GIS技术对纽约进行地下水风险分析。

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Using Geographic Information System (GIS) technology, data layers can be processed and analyzed to produce a regional groundwater-risk grid of New York State (NYS). GIS can be used to assess the potential to introduce contaminants at the ground surface, and assess the potential for the contaminants to migrate through the vadose zone and be introduced to an aquifer at the water-table.; The potential to introduce contaminants to the ground surface was assessed utilizing existing database information in combination with the United States Geological Survey (USGS) Multi-Resolution Land Classification (MRLC) land use grid. The databases allowed an analysis of contaminant association with Standard Industrial Classification (SIC) codes, risk evaluation of the contaminants using groundwater intake values protective of human health, the development of SIC code-risk values, the construction of a SIC code-risked facility point coverage, and the construction of a land use-risk grid; this grid assesses the potential to introduce contaminants to the ground surface.; Aquifer susceptibility was determined by analyzing vadose zone residence time assuming saturated conditions. Vadose zone residence time is a measure of the vadose zone's ability to attenuate and retard the migration of contaminants. Existing data layers were processed to produce a depth to water-table (vadose zone thickness) grid. Existing GIS data layers of soil, surficial geology and bedrock geology, along with review of literature and pump/slug test data, enabled the creation of thickness, porosity and vertical hydraulic conductivity grids for the three considered components of the vadose zone. The average linear velocity was then calculated for each vadose zone component by dividing their hydraulic conductivity grid by their respective porosity grid. The thickness grid of each vadose zone component was then divided by their respective average linear velocity grid to produce vadose zone residence time grids. The sum of the three residence time grids produced a grid which is a measure of aquifer susceptibility.; A groundwater-risk grid of NYS was produced by dividing the land use-risk grid by the aquifer susceptibility grid. Areas of significant groundwater-risk were identified.; The confidence of the groundwater-risk grid was evaluated by correlating existing Comprehensive Environmental Response, Compensation and Liability Act of 1980 (CERCLA) National Priority List (NPL) groundwater contamination sites in NYS with identified areas of significant groundwater-risk. Maximum grid values of significant groundwater-risk within CERCLA NPL groundwater contamination areas show a correlation of 76%.
机译：使用地理信息系统（GIS）技术，可以对数据层进行处理和分析，以生成纽约州（NYS）的区域性地下水风险网格。 GIS可用于评估将污染物引入地面的可能性，并评估污染物迁移通过渗流带并被引入地下水位的含水层的可能性。利用现有的数据库信息，结合美国地质调查局（USGS）的多分辨率土地分类（MRLC）土地利用网格，评估了将污染物引入地面的可能性。该数据库允许使用标准工业分类（SIC）法规对污染物进行关联分析，使用保护人体健康的地下水摄入值对污染物进行风险评估，制定SIC法规风险值，构建具有SIC法规的设施点覆盖范围，以及建立土地使用风险网格；该网格评估了将污染物引入地面的可能性。通过在假设饱和条件下分析渗流带停留时间来确定含水层敏感性。渗流区停留时间是渗流区减弱和阻止污染物迁移的能力的量度。对现有数据层进行处理，以生成深度到水位（渗流区厚度）的网格。现有的土壤，表层地质和基岩地质的GIS数据层，以及文献资料和泵/段塞测试数据的回顾，使得能够为渗流带的三个已考虑组成部分创建厚度，孔隙度和垂直导水率网格。然后，通过将其渗流率网格除以各自的孔隙率网格，计算出每个渗流带成分的平均线速度。然后将每个渗流带成分的厚度网格除以它们各自的平均线速度网格，以产生渗流带停留时间网格。三个停留时间网格的总和形成了一个网格，该网格是对含水层敏感性的度量。通过将土地使用风险网格除以含水层敏感性网格，可以制作出纽约州的地下水风险网格。确定有重大地下水风险的区域。通过将现有的《 1980年综合环境响应，赔偿和责任法案》（CERCLA），《纽约州国家重点清单》（NPL）地下水污染地点与已确定的具有重大地下水风险的地区相关联，来评估地下水风险网格的置信度。 CERCLA NPL地下水污染区域内重大地下水风险的最大网格值显示出76％的相关性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号