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Weather radar records drastic drop in mayfly populations（图）
Weather radar drastic drop mayfly populations
2020/2/20
At the beginning of each summer, mayfly larvae emerge from bodies of water and shed their skin to become full-fledged mayflies, similar to the way in which caterpillars become butterflies.
Assessing aquifer vulnerability to arsenic pollution using DRASTIC and GIS of North Bengal Plain:A case study of English Bazar Block, Malda District,West Bengal,India
DRASTIC vulnerability arsenic groundwater Malda West Bengal
2015/8/13
Geographic Information System (GIS) was utilized to apply a modified DRASTIC method to assess the aquifer vulnerability to pollution of English Bazar Block of Malda District, West Bengal, India. In th...
Assessing aquifer vulnerability to arsenic pollution using DRASTIC and GIS of North Bengal Plain: A case study of English Bazar Block, Malda District, West Bengal, India
DRASTIC vulnerability arsenic groundwater
2015/1/7
Geographic Information System (GIS) was utilized to apply a modified DRASTIC method to assess the aquifer vulnerability to pollution of English Bazar Block of Malda District, West Bengal, India. In th...
DRASTIC与同位素方法在内蒙古呼和浩特市地下水防污性评价中的应用
防污性能 地下水 DRASTIC 同位素
2013/10/30
以内蒙古呼和浩特市平原区地下水系统为例, 采用传统DRASTIC方法和同位素3H浓度、3H与14C测年的新方法划分了不同的地下水系统防污性能区, 开展了地下水系统防污性评价方法研究。研究结果表明, DRASTIC方法评价结果显示了浅层地下水系统对来自垂向上污染物的固有防御能力; 同位素方法评价结果反映了浅、深层含水层系统对来自补给区污染物的防御能力。并且文中指出了两种评价方法各自具有优、缺点。最后...
A STUDY OF GROUNDWATER POLLUTION VULNERABILITY USING DRASTIC/GIS, WEST BENGAL, INDIA
Geographic Information System groundwater planning GROUNDWATER POLLUTION
2009/10/13
Information about vulnerability of groundwater to contamination is essential to facilitate groundwater planning and management. The vulnerability of shallow groundwater to con-tamination in and around...
GROUNDWATER POLLUTION VULNERABILITY USING THE DRASTIC MODEL IN A GIS ENVIRONMENT, DEVAK-RUI WATERSHEDS, INDIA
groundwater pollution against contamination groundwater planning and management
2009/10/12
Assessment of groundwater pollution vulnerability using the DRASTIC model in a GIS environment has become more widespread for effective groundwater planning and management. Groundwater vulnerability i...
Prehistoric remains reveal a drastic shift in northern fur seal ecology（图）
ecology biochemistry fur seal
2007/5/24
21-May-2007，Washington, DC -- Northern fur seals have experienced major changes in their behavior, ecology, and geographic range of over the past 1,000 years, according to a new study appearing in the...