3955

3733

كارشناسي ارشد

بيابان زدايي

اصفهان: دانشگاه صنعتي اصفهان، دانشكده منابع طبيعي

1386

پانزده، 120، [II]ص.: مصور، جدول، نمودار

ص. ع. به فارسي و انگليسي

حميدرضا كريم زاده

سعيد سلطاني كوپائي، فخرالدين افضلي

26/03/87

احمد جلاليان، افشين هنر بخش

1396/03/06

كتابنامه

منابع طبيعي

مهندسي منابع طبيعي

ID3733

به فارسي و انگليسي: قابل رؤيت در نسخه ديجيتال

AbstractMany of Iran s lands has located in arid and semi arid zones as the wind is a important factorof erosion and land degradation in these regions so it is necessary to study wind propertiessuch as speed direction and frequency The aim of this study is comprehensive and appliedresearch on wind properties in four synoptic climatology stations in Semnan province that foraccomplishment of it was plotted wind rose and sand rose of them as monthly yearly and longtime series and was predicted and simulated wind speed and direction data in hourly format Additionally was accomplished frequency analysis in two sections of monthly and variousdirections In order to plotting of wind rose and sand rose first was transformed data derivedfrom Iran Climatology Organization to acceptable format of wind rose and sand rose plottingsoft wares using WD Convert program Then was used WR Plot software in order to plottingof wind rose with plotting capability of various direction of wind rose various categories ofwind speed and their frequencies Sand Rose Graph was used in order to sand rose plottingwhile it is capable for calculation of sand movement potential resultant of sand movementpotential angle of sand movement relative to north direction and homogeneous index of sandtransportation aspect For prediction and simulation of wind speed and direction was usedWindpred software that all calculations result on basis of Weibull relationship Frequencyanalysis was accomplished in two separated sections by Freq082004 software that is runningin MATLAB environment including 16 directions and year months Results showed thatwind direction in four mentioned climatology stations is north in Biarejmand st east inGarmsar st north north west in Semnan st and north in Shahrud st Most percentage ofquiet wind in Biarjmand station is belong to year 1994 and December month in Garmsarstation is belong to year 1986 and December month in Semnan station is belong to year 1977and January month and in Shahrud station is belong to year 2002 and December month It wasshown that in dividing of various energy groups Shahrud station locates in low energy group Semnan station locates in moderate energy group and Garmsar and Biarjmand stations locatesin high energy group In aspect of homogenous index of sand transportation Biarjmand Shahrud Semnan and Garmsar stations have highest index amount in arrangement in otherwords they have minimum variation in dominant wind blowing direction July month inBiarjmand Garmsar and Semnan stations and April month in Shahrud station were predictedas most turbulent months Highest simulated hourly wind speed amount generally happens inbetween of 11 to 14 o clock Highest estimated speed for long return periods belongs to westsouth west direction in Biarjmand station north north west direction in Garmsar station northdirection in Semnan station and west north west direction in Shahrud station Highestestimated speed for various months in Biarjmand station belongs to February Garmsar andShahrud station belonges to May and in Semnan station belonges to March According to thisstudy and its applied results in natural resources agriculture and development fields it isproposed that to use yearly data which have enveloped on basis of Weibull distribution for allover of country Key words Wind speed wind direction wind frequency wind rose sand rose Weibulldistribution Semnan province Iran

حميدرضا كريم زاده

سعيد سلطاني كوپائي، فخرالدين افضلي

احمد جلاليان، افشين هنر بخش