The problem of environmental degradation is becoming very real in Nigeria. It is also becoming a major source of insecurity locally. In recent times, flooding which affects most parts of the country has resulted in displacement of communities in most states of the federation. While flooding is largely a natural phenomenon, the upgrading of environmental infrastructure should be complemented wit...

this study was conducted to determine the spatial variability and mapping of available micronutrients iron, zinc, copper and manganese on 20,000 hectares of soils in south of tehran lands in order to identify deficiency, enough and toxicity areas. 196 surface soil samples (0-25cm) to a regular grid network of 1000×1000m were collected and extracted by dtpa and tea and concentrations of elements...

Accurate geospatial information on the extent of irrigated land improves our understanding of agricultural water use, local land surface processes, conservation or depletion of water resources, and components of the hydrologic budget. We have developed a method in a geospatial modeling framework that assimilates irrigation statistics with remotely sensed parameters describing vegetation growth ...

Change detecting and timely updating of residential areas is widely recognized as one of the most challenging tasks for an operational GIS. High spatial resolution satellite data provide an efficient source of information. This paper describes a hierarchical object-oriented approach for extracting residential areas from IKONOS and SPOT5 images acquired in 2001 and 2004, respectively. Hierarchic...

1. introduction as a result of the urban sprawl, brownfield areas are accessible in all the cities of the world as well as the iranian cities such as mashhad. these vacant lands provide cities with the possibilities of the inner development and more compact cities. in other words, brownfield areas can promote the compactness by promoting cities in terms of economy durability, social inclusion, ...

Tropical peat swamp lands in the Southeast Asia which store tremendous large amount of carbon in their peat layer and abundant biodiversity are now endangered by human activities such as deforestation, forest fires, land development and urbanization. To earlier start a better environmental policy for conservation of nature of the tropical peat swamp area is one of the preferential global issues...