introduction: iran is constantly exposed to natural disasters such as floods, earthquakes and drought. in the meantime, drought is the major natural disaster which leads to numerous losses in agriculture and water resources, and this phenomenon is slow and creeping.available evidence suggests that drought management is based on crisis management. as the present management in our country is base...

background: groundwater nitrate pollution is an important environmental problem in water resources management. in this regard, specific measures aiming at prevention of water pollution will be helpful to managers and decision-makers. identification of aquifers’ vulnerable areas and determination of groundwater protection zones using most widely used models, such as drastic and cd, are one of th...

Recent drought events in the United States and the magnitude of drought losses indicate the continuing vulnerability of the country to drought. Until recently, drought management in many states, including Nebraska, has been largely response oriented with little or no attention to mitigation and preparedness. In 1998, Nebraska began to revise its drought plan in order to place more emphasis on m...

A method to predict groundwater vulnerability to pesticide contamination on a regional scale has been developed and applied to a part of the upper Rhone river valley in Western Switzerland. Ž . Stochastic application of deterministic pesticide leaching models Monte-Carlo , along with geostatistical interpolation techniques, were used to map both vulnerability levels and uncertainŽ ties. The var...

Complex biophysical, social, and human behavioral factors influence population vulnerability to vector-borne diseases. Spatially and temporally dynamic environmental and anthropogenic patterns require sophisticated mapping and modeling techniques. While many studies use environmental variables to predict risk, human population vulnerability has been a challenge to incorporate into spatial risk ...

Current network security tools generally lack sufficient context for maintaining a well informed and proactive defense posture. Vulnerabilities are usually assessed in isolation, without considering how they contribute to overall attack risk. Similarly, intrusion alarms are logged as isolated events, with limited correlation capabilities. Security professionals are overwhelmed by constant threa...

natural aquifer vulnerability can be defined as reaching pollution to groundwater and the possibility to propogate in it after land contamination. this is a relative specification, with no dimension and cannot be measured; which it is not only depended on aquifer specification but also on geological and hydrological characteristics of the aquifer of the region. varieties of methods have been de...