شناسايي خرد اقليم هاي شهر اصفهان و بررسي اثر آن ها بر دماي هوا، درصد رطوبت نسبي هوا و تبخير-تعرق گياه مرجع

چكيده انگليسي :

Identification of Micro Climates of Isfahan City and its Effect on Air Temperature Relative Air Humidity and Reference Crop Evapotranspiration Elham Shafieyoun eshafieyoun@gmail com Date of submission Februrary 2011 Department of Water Engineering College of Agriculture Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Mahdi Gheysari Assistant Professor Supervisor Jahangir Abedi Associate Professor Supervisor AbstractUrbanization process creates significant changes in land surface and atmospheric properties oflocation that affect the net amount of radiation received at ground level relative humidity andsensible heat Green space with a variety of different land uses in different parts of city createsvariety of heat flow that creates the framework of microclimate Expanding population andindustry growth in the Isfahan metropolitan city and its combination with natural factors causechanges in the climate of this city The purpose of this study was to identify micro climate ofIsfahan city and their effect on temperature air humidity and reference crop evapotranspirationin order to optimal management of landscape irrigation Air temperature and relative humidityin the city was affected by various factors including landscape surfaces asphalt surfaces building surfaces agricultural lands arid lands water surfaces population density and traffic Inorder to investigate the effect of air temperature and relative humidity a GIS map of Isfahan citywas used and five regions with different surfaces were identified Weather shelters and stabilitydevices were installed ineach of five regions to measure air temperature and relative humidity In order to justify the weather data from stability devices installed in the city with weather datafrom Isfahan meteorological station a stability device was placed in the weather station Reference station Air temperature and relative humidity were measured with time interval of5 minutes and period of 12 month from November 2010 to October 2011 Daily reference cropevapotranspiration was calculated using FAO Penman Monteith and Hargreaves Samaniequations Analysis was done in the four periods from 0 to 6 6 to 12 12 to 18 and 18 to 0 usingrecorded data Air temperature and relative humidity in each of five stations located in the citywere defined as a linear function of air temperature and relative humidity in the referencestation The results showed that there is a significant differences P 0 01 in all 12 months ofthe year for air temperature and relative humidity between city stations and reference station Maximum difference in average monthly air temperature was equal to 6 07 C betweenreference station and station 3 Fadak Garden in September and maximum difference inaverage monthly relative humidity was equal to 40 73 between reference station and station 1 Flowers Garden occurred in December The most effect of urban microclimates was observedon the minimum daily air temperature in all stations Maximum difference in air temperaturebetween city stations and reference station and relative humidity at city station and referencestation has occurred at night and minimum difference has occurred at day Air temperaturesduring the day in downtown station were more than reference station in all months of the year The type and extent of green space has a great impact on air temperature and relative humidity Green space surfaces including parks and lawns with reducing hard surfaces cause decrease inair temperature and increase in relative humidity Green canopy of trees planted along streetshas a little effect on reducing air temperature and increasing relative humidity Because the landuses under the canopy of trees is different and has interaction effect with green space Maximumdifference in water requirement calculated using the FAO Penman Monteith equationbetween reference station and the city stations was 11 percent Key words microclimate urban green space land use water requirement FAO

شفيعيون، الهام

شناسايي خرد اقليم هاي شهر اصفهان و بررسي اثر آن ها بر دماي هوا، درصد رطوبت نسبي هوا و تبخير-تعرق گياه مرجع

ميكروكليما , فضاي سبز شهري , كاربري اراضي , نياز آبي , فائو- پنمن- مانتيث , هارگريوز-ساماني