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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.
Assessment of shallow groundwater vulnerability in Dahei River Plain based on AHP and DRASTIC
Groundwater vulnerability DRASTIC model AHP Dahei River Plain ARCGIS
2018/3/23
Based on the special hydrogeological conditions of the Dahei River Plain in the Inner Mongolia area, assessment of shallow groundwater vulnerability is conducted based on DRASTIC model. Each evaluatio...
Earlier snowmelt carries drastic consequences for forests
snowmelt drastic consequences forests
2016/8/11
Earlier snowmelt periods associated with a warming climate may hinder subalpine forest regulation of atmospheric carbon dioxide (CO2), according to the results of a new University of Colorado Boulder ...
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...
The Nature,Characteristics & Influence of the Drastic Changes in the Middle East
Drastic Changes in Middle East Islamic Democracy
2015/8/20
The continuously evolving political turbulences and upheavals of the Arab countries can be regarded as an endogenous Arab democratic movement. In this evolving process, “the Islamic Elements” once aga...
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...
Assessing Groundwater Vulnerability in Azraq Basin Area by a Modified DRASTIC Index
Groundwater Vulnerability Azraq DRASTIC Index Aquifer GIS
2013/3/21
Groundwater is the main source for water supply in Jordan. Surface water is limited due to low precipitation rates. Studying groundwater vulnerability helps to protect this main source of depletion an...
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...
DRASTIC指标体系法在地下水脆弱性评价中的应用
2007/12/14
摘要运用DRASTIC指标体系法，考虑含水层埋深、净补给量、含水层介质类型、土壤介质类型、地形坡度、渗流区介质类型和含水层渗透系数等七项参数，按评价单元进行划分，对吉林市城区地下水脆弱性进行了综合评价；并利用AUTOCAD绘制出吉林市城区地下水脆弱性成果因。
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...