نتایج جستجو برای: irrigation and drainage network development
تعداد نتایج: 17121347 فیلتر نتایج به سال:
ment for intra−abdominal abscess, al− though operative mortality is high [1]. Percutaneous drainage is another option but is associated with significant morbid− ity due to the relatively long route used for catheter placement [1,2]. Endoscopic ultrasound (EUS)−guided drainage is po− tentially safe and effective for intra−ab− dominal abscess. We report a case of omental bursa abscess complicatin...
Development of pore network models for real porous media requires a detailed understanding of physical processes occurring on the microscopic scale and a complete description of porous media morphology. In this study, the microstructure of porous media has been represented by three dimensional networks of interconnected pores and throats which are designed by an object oriented approach. Af...
Bi-level drainage system is a type of underground drainage systems, in which adjacent drainage lines are installed at different depths. In the Hydraulics Laboratory, Ferdowsi University of Mashhad, a model was built, that include a cube tank 2 meters in length, width and height of 1 meters was made of galvanized. In this model, two rows 20 cm apart from each other drains were installed. As dr...
This is the second of two papers that elaborate on an integrated drainage network analysis system (IDNAS) for agricultural drainage management. In the ®rst paper, the system components, functions and implementation were presented. This paper focuses on the system applications to agricultural drainage management, particularly on the acid drainage problems in an estuarine acid sulfate soil ̄oodpl...
there are many approaches for solving variety combinatorial optimization problems (np-compelete) that devided to exact solutions and approximate solutions. exact methods can only be used for very small size instances due to their expontional search space. for real-world problems, we have to employ approximate methods such as evolutionary algorithms (eas) that find a near-optimal solution in a r...
A field study was conducted at the Zabol Agricultural Research Center during the years (2003-2004) to investigate the effect of irrigation with treated municipal wastewater on the yield and quality of wheat and some soil properties. Irrigation treatments were: T1: Irrigation of wheat with well water during entire period of growing season T2: Irrigation of wheat with well water until the begging...
abstract this study aimed at investigating the impact of etymology strategy instruction on the development of vocabulary of iranian intermediate efl learners. etymology, knowledge of origin of words, roots, and affixes, has proved to be a controversial issue and a question of long debate with regard to its impact on the process of vocabulary learning. this study employed etymology strategy in ...
importance of farmers' participation in system design and management has been emphasized in various fields. motivation is thought as the most important factor affecting farmers' participation in agricultural development programs. many theories have been postulated in motivation field and abundant research projects accomplished in this area. mcmillion’s theory was recognized as appropr...
water user associations (wuas) are the main strategy in water resources management, and transferring of irrigation management to these associations is paying attention in different countries. the current study aimed to identify and analyze membership consequences in wuas. the research was descriptive and survey method was used. the population of this study consisted of all farmers in irrigation...
China's water resources are under increasing pressure from socioeconomic development, diet shifts, and climate change. Agriculture still concentrates most of the national water withdrawal. Moreover, a spatial mismatch in water and arable land availability--with abundant agricultural land and little water resources in the north--increases water scarcity and results in virtual water transfers fro...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید