نتایج جستجو برای: penman monteith
تعداد نتایج: 871 فیلتر نتایج به سال:
A research was conducted in Fars province Agricultural Research Center in Zarghan area from 1999 to 2002 to determine the water requirement and crop coefficient of wheat, applying lysimeter. The results indicated that the water requirements of wheat were 720, 712 and 674 mm in the years of 1999-2000, 2000-2001 and 2001-2002, respectively. Using Penman-Monteith method for estimating reference ...
The estimation of crop water requirement is one the most important stages for designing different irrigation systems, programming and corrected management of water resources. Therefore, to determine the water requirement for Coriandrum sativum L. a study was conducted in College of Agriculture Research Farm at Razi University in the city of Kermanshah during two years, 2010 and 2011. For this p...
[1] The Palmer Drought Severity Index (PDSI) has been widely used to study aridity changes in modern and past climates. Efforts to address its major problems have led to new variants of the PDSI, such as the self‐calibrating PDSI (sc_PDSI) and PDSI using improved formulations for potential evapotranspiration (PE), such as the Penman‐Monteith equation (PE_pm) instead of the Thornthwaite equation...
برای برآورد تبخیرتعرق گیاه مرجع (ET0) روش ترکیبی فائوـ پنمنـ مانتیث (F-P-M)، به منزلة روشی استاندارد، جهت ارزیابی نتایج سایر روشهای تجربی در دو گروه دمایی ]بلانیـ کریدل (B-C) و هارگریوزـ سامانی (H-S)[ و تشعشعی ]جنسنـ هیز (J-H) و تورک (Tc)[ استفاده میشود. در این تحقیق، با استفاده از دادههای ایستگاه هواشناسی کشاورزی هاشمآباد گرگان، واقع در اقلیمی نیمهخشک، مقادیر ET0 برآوردی با مقادیر رو...
Nighttime evapotranspiration (ETN) has typically been neglected in estimating water loss from land surfaces. Our objective was to quantify the contribution of ETN to daily (24-h) ET (ET24) of irrigated and dryland cotton (GossypiumhirsutumL.) and irrigated alfalfa (Medicago sativa L.) grown in a semiarid climate. The results were then examined using a Penman–Monteith ETmodel which separates con...
Evapotranspiration (ET) is a key variable in the hydrological cycle and it directly impacts surface balance its accurate assessment essential for correct water management. ET difficult to measure, since existing methods direct estimate, such as weighing lysimeter or eddy-covariance system, are often expensive require well-trained research personnel. To overcome this limit, different authors dev...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید