empirical models are important tools for relating field-measured biophysical variables to remotely sensed data. regression analysis has been a popular empirical method of linking these two types of data to estimate variables such as biomass, percent vegetation canopy cover, and bare soil. this study was conducted in a semi-arid rangeland ecosystem of qazvin province, iran. this paper presents t...

We examined changes in rangeland health in the semi-arid woodlands of eastern Australia at fixed sites between 1989 and 1999. Over the 11-year period there were significant declines in the quality of the vegetation, and changes in plant species were driven largely by seasonality, and to a lesser extent, amount of rainfall. Three indices of rangelands health (composition, function and stability)...

The city of Yazd has a large number traditional houses. Houses with central courtyards and an Iwan were suitable for establishing thermal comfort conditions. In this research, the effect Iwan's depth ratio adjacent room's openings on condition in residential courtyard buildings evaluated. current research aims to provide optimal model increase sustainable development use such models as contempo...

There have been few attempts to develop, test or apply sustainability indicators for natural resource management at a farm-level, and even fewer have fully consulted land users from the initiation of this process. While environmental sustainability indicators need to be accurate and reliable, land users also need them to be rapid, cost-effective and easy to use, in addition to being linked to m...

based on the importance and role of species diversity and richness as ameasurement of the health of an ecosystem; studying of their components can lead toevaluate the health condition of rangeland. this research was carried out in a part ofhighland mountainous rangeland of mount alborz range in iran. diversity and richnesswere assessed as an ecosystem health indicator. the study area was locate...

Political instability (PI) occurs between governments and other political elites either at the local, regional, and/or national levels. Planning, implementing, monitoring of sustainable rangeland management strategies have a significant impact on environment an area. In this study, term PI implies unsafe unstable exercise power, is major obstacle to implementation management. The main purpose r...