of the many climatic events that influence the earth’s environment, drought is perhaps the one that is most linked with desertification. drought is the consequence of a natural reduction in the amount of precipitation received over an extended period, usually a season or more in length. drought monitoring is an essential component of drought risk management. it is normally performed using vario...

heavy metals, in particular mercury, are important for the public health due to their toxicity and endurance in the environment. in the present study, the distribution of mercury was surveyed along the coast of the caspian sea (mazandaran province). twelve stations were selected and from each station 5 samples were randomly collected followed by chemical analyses. an inverse weight-distance met...

Overutilization of groundwater resources can put their quality under stress. It could be base on rapid declination in groundwater level leading to salt water intrusion in the coastal aquifers. The objective of this study was to map the vulnerability of salt water intrusion of the Urmia Lake, Iran to nearby coastal aquifer (Azarshahr) using GALDIT method. The GALDIT index based on six parameters...

heavy metals are one of the most important and the best known pollutants that its entry into the environment causes to appear damages and different diseases. this study aimed to determine the amount of nickel concentration in soil and leaves of platanus orientalis, estimate and mapping it in rasht city area by using geostatistic method. to achieve these goals 126 samples of surface soil (0-30 c...

abstract: converting point data to continuous one is the first step in order to use them in scorpan flowchart. for this purpose, different geostatistic methods are available which at present research regression kriging with local variogram was applied. for mapping apparent electrical conductivity at the area covering 72000ha located in ardakan region, 700 readings in horizontal and vertical mod...