This study investigates the possibility providing gully erosion map by the supervised classification of satellite images (ETM) in two mountainous and plain land types. These land types were the part of Varamin plain, Tehran province, and Roodbar subbasin, Guilan province, as plain and mountain land types, respectively. The position of 652 and 124 ground control points were recorded by GPS respe...

The protection and sustainable management of forest carbon stocks, particularly in the tropics, is a key factor in the mitigation of global change effects. However, our knowledge of how land use and elevation affect carbon stocks in tropical ecosystems is very limited. We compared aboveground biomass of trees, shrubs and herbs for eleven natural and human-influenced habitat types occurring over...

The sharp decline in Indiana farmland values is about over. That's the conclusion of a majority of Purdue land values survey respondents who answered a question on when and at what level land values will "bottom out." Fifty-eight percent of those who responded to the question believe that the low point in land values will be 95 to 100 percent of mid-1987 values. An additional 25 percent felt th...

In slopes of Mediterranean mid-mountain areas, land use and cover changes linked to the abandonment cropland activity affect soil quality degradation redistribution; however, limited attention has been paid this issue at catchment scale. This paper evaluates effects post-land management (through natural revegetation afforestation) on redistribution rates using fallout 137Cs measurements in Arag...

The catastrophic earthquake, 7.3 on the Richter scale, occurred on September 21, 1999. The 921 Earthquake was a terrifying disaster that caused numerous casualties in Central Taiwan. It is the severest earthquake in a recent hundred years. The land morphology and topography changed greatly with such features as land upheaval, river blockades and lakes dammed by debris in many locations. Severe ...

At present the large scale vegetation restoration and intensive oil exploiting had brought huge influence on local environment in Yan'an region. the sediment yield data form series experiment plots and hydrological monitoring station in the Yan'an watershed after one rainfall event on July 2, 2005, which included sediment from different land uses (crop-land plot, vegetation plots, hard road sur...

Available observations suggest that some mountain regions are experiencing seasonal warming rates that are greater than the global land average. There is also evidence from observational and modeling studies for an elevation-dependent climate response within some mountain regions. Our understanding of climate change in mountains, however, remains challenging owing to inadequacies in observation...

For the first time, an assemblage of cryptospores, which includes 10 species belonging to nine genera, from the Upper Ordovicianstrata, is being reported, in Iran. These cryptospore assemblages were recovered from the upper part of Ghelli Formation., from theeastern Alborz Mountain range. These peri-Gondwanan cryptospores have been classified based on their morphology (monad, truedyad, pseudody...