Effects of Green Spaces Expansion on Urban Heat Island Pattern, Case Study: Velayat Urban Park
Message:
Abstract:
High urban population, irregular urban development, improper green space capitation, and heterogeneous distribution of green spaces in Tehran have made the heat island to increase its intensity and become multi-core; of which one is located above the Velayat urban park. Due to the green space sprawl in this region, and regarding the relationship between the heat island intensity and urban green spaces, the effects of green spaces sprawl on urban heat island pattern are examined in this research. To carry this out, the land use/land cover (LULC) and green space sprawl were investigated using Google, TM and OLI-TIRS imagery data were obtained and processed using ENVI 4.7. The results were entered into the microclimatic model Envi-met with spatial resolution of 20 meters for the region of 3.4 to 2.6 kilometers. Simulations were done with hourly intervals of which a six hour interval was depicted in this research. Results indicate a strong significant correlation between the model outputs and measured data of Meydan-e-Bahman pollution measuring station (related to Department of Environment). The central region of Velayat Park is a usual place for a cold core to form. Furthermore, high buildings located around the park prevent the cold weather (tongue) to penetrate the residential areas. The effects of green space sprawl on the heat island pattern could be seen as an increase in the temperature differences of various land covers in warm seasons and as a decrease in diurnal temperature of different land covers in cold seasons.
Language:
Persian
Published:
Geographical Urban Planning Research, Volume:3 Issue: 1, 2015
Pages:
85 to 99
magiran.com/p1464090  
دانلود و مطالعه متن این مقاله با یکی از روشهای زیر امکان پذیر است:
اشتراک شخصی
با عضویت و پرداخت آنلاین حق اشتراک یک‌ساله به مبلغ 990,000ريال می‌توانید 70 عنوان مطلب دانلود کنید!
اشتراک سازمانی
به کتابخانه دانشگاه یا محل کار خود پیشنهاد کنید تا اشتراک سازمانی این پایگاه را برای دسترسی نامحدود همه کاربران به متن مطالب تهیه نمایند!
توجه!
  • حق عضویت دریافتی صرف حمایت از نشریات عضو و نگهداری، تکمیل و توسعه مگیران می‌شود.
  • پرداخت حق اشتراک و دانلود مقالات اجازه بازنشر آن در سایر رسانه‌های چاپی و دیجیتال را به کاربر نمی‌دهد.
دسترسی سراسری کاربران دانشگاه پیام نور!
اعضای هیئت علمی و دانشجویان دانشگاه پیام نور در سراسر کشور، در صورت ثبت نام با ایمیل دانشگاهی، تا پایان فروردین ماه 1403 به مقالات سایت دسترسی خواهند داشت!
In order to view content subscription is required

Personal subscription
Subscribe magiran.com for 50 € euros via PayPal and download 70 articles during a year.
Organization subscription
Please contact us to subscribe your university or library for unlimited access!