نتایج جستجو برای: and spatial space spatial distribution
تعداد نتایج: 16998550 فیلتر نتایج به سال:
Water changes information in the hydrological system, in time and space, as an environmental issue takes heed of managers and decision makers in watershed management and river engineering, which can be addressed by using spatially distributed modeling. In this study simulation of water balance components in Taleghan mountainous watershed is performed using the spatially distributed hydrological...
The purpose of this study was to evaluate the spatial changes of groundwater phosphate concentrations using geostatistical methods based on data from 10 groundwater wells. One of the conventional tools in decision making on the groundwater management is geostatistical method. To evaluate the spatial changes of phosphate concentrations in groundwater, the universal kriging method with cross-vali...
One of the criteria of social justice and urban sustainable development is considering balanced distribution of infrastructures and urban facilities therefore, the distribution of the services should be in such a way that not only it creates spatial justice in the areas, but it also prepare the ground for urban development. This research has descriptive-analytical approach and tries to recogniz...
population density and spatial distribution of thrips tabaci lindeman on seven soybean varieties (williams, tellar, sahar, dpx, l17, sari and zane) and one genotype (ks3494) were studied in tehran region, during 2007. the highest population density of the thrips per leaf was recorded on dpx and on ks3494 (0.810.05 and 0.800.05, respectively). the lowest population density was observed on l17 ...
In an urban built environment, on the one hand people behave based on their spatial cognition of the environment spatial behavior in interaction with the environment depends on the spatial cognition. On the other hand many researches have also pointed that spatial configuration as the relational characteristics of the physical elements of environment, influence on the spatial cognition. Based o...
Drought is one of the main factors of ecological potential stress due to the wide extension of the time scale and impact space. The performance of regional drought monitoring using the meteorological indicators is a challenge due to spatial distribution constraints. In present study, 168 time series images including NDVI and LST indices were used. Integrating these two indices, VSWI was used to...
the aim of this study was to present a model to identify and interpret sport places per capita according to distribution of thiessen networks in geographical information system (gis) space. to execute the model, three regions (5, 6 & 13) of isfahan city were considered and indoor pools were also considered as the sport place sample. dwg-format region maps and their blocks, spatial data and accu...
Background and Objective: In the recent decade, critical condition of particulate matters (PMs) concentration is considered as one of the most important issues in Tehran megacity. Due to sparse spatial distribution of air quality monitoring stations and economic considerations, researchers proposed remote sensing technique as a fast and economical way to obtain complete spatial and temporal cov...
land use changes are one of the important consequences of urban spatial extent. regarding the role of green space as one of important land use classes in urban ecosystems, the investigations of its changes seem to be crucial. in this study, to estimate the changes of green space, the ndvi index was applied to tm and irs images of 1990 and 2006 and green space maps of district 1 of tehran munici...
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