surface. the development of gullies causes the loss of a great amount of soil and could be considered as one of the principal causes of geo-environmental degradation. in this research fazi model introduced for gully erosion zonation in arid and semiarid area considered to calibration and validation in kahkiloeh and boyerahmad province. therefore, the abgandi watershed were selected by considera...

Vulnerability maps are useful for groundwater protection, water resources development, and land use management. The literature contains various approaches intrinsic vulnerability assessment, they mainly depend on hydrogeological settings anthropogenic impacts. Most methods assign certain ratings weights to each contributing factor vulnerability. Fuzzy logic (FL) is an alternative artificial int...

A multi-criteria routing algorithm running in mesh structured that overlay an unstructured peer-to-peer network is proposed. This approach aims to improve the quality of service routing (QoSR) of the modern distributed application. Using a grid pattern can improve routing remarkably, since it provides alternative and partly disjunctive paths of equal length as well as the ability to measure dis...

Motivated by the recent successful results of using GIS modeling in a variety of problems related to the geosciences, some knowledge-based methods were applied to a regional scale mapping of the mineral potential, special for Cu-Au mineralization in the Feyz-Abad area located in the NE of Iran. Mineral Prospectivity Mapping (MPM) is a multi-step process that ranks a promising target area for mo...

Landfill siting should take into account a wide range of territorial and legal factors in order to reduce negative impacts on the environment. The suitability of selected site for disposal center affects the amount of generated energy and the cost of disposal generation. Suitable sites should be determined on the basis of technical, economical and socio-environmental issues. GIS along with appr...

Droughts can be regarded as one of the most spatially complex geohazards, causing a severe impact on socio-economic aspects. Preparing comprehensive drought management plan is necessary to mitigate risks, and first step towards achieving it preparation vulnerability map. The present study integrates geospatial methods with Fuzzy-Analytical Hierarchy Process (Fuzzy-AHP) technique, prepare map fo...

introduction: agriculture is one of the main uses of the land. using agriculture to increase production is always with acidification and loss of groundwater reserves. therefore, with proper planning for use of agricultural land so that to leave the least negative impacts on the soil and water pollution, it is regarded imperative for sustainable development. this study is aimed to better underst...

The B3G or 4G of cellular/wireless communications network is expected to be purely IP-based and consist of heterogeneous access networks from 3G cellular, WiFi, WiMAX and a converged core network. To support the mobile host in the hybrid overlay wireless, a cross-layer vertical handoff control method has been proposed. Implemented architecture is composed of four part; Connection Profile Manage...