نتایج جستجو برای: irrigation and drainage projects

تعداد نتایج: 16848934  

2009
CHARLES M. BURT

The Cal Poly ITRC irrigation evaluation programs have been widely used to assess the global distribution uniformity (DU) of drip and microsprayer irrigation systems. The field procedures and formulas used in the program are presented in this paper. The system DU is estimated by mathematically combining the component DU values. DU components include pressure differences, "other causes" (such as ...

2012
Nikolaos Rigopoulos Zoe H. Dailiana Sokratis Varitimidis Kostantinos N. Malizos

Despite modern diagnostic methods, surgical advances and antibiotics evolution, acute closed-space hand infections still remain a therapeutic challenge. The aim of this review is to present its special clinical features and the current therapeutic management based on the infection site, the type of the infecting pathogen and the host-type. Anatomic pathways facilitate the spread of the infectio...

Journal: :پژوهش آب در کشاورزی 0

infiltration and its modeling are important in design and implementation of irrigation projects, drainage, water-resources management, soil-conservation, hydrological studies, and artificial-recharge of groundwater and are influenced by different characteristics of soil and infiltrated water including the amount of salinity and sodium. the aim of this study was to evaluate the infiltration mode...

Journal: :اکو هیدرولوژی 0
علیرضا وفائی نژاد استادیار، دانشکدۀ مهندسی آب و محیط زیست، پردیس فنی مهندسی (شهید عباسپور) دانشگاه شهید بهشتی جواد یوسف زاده کارشناس ارشد سنجش از دور و سیستم اطلاعات جغرافیایی حسین یوسفی استادیار، دانشکدۀ علوم و فنون نوین، دانشگاه تهران، ایران ناصر محمدی ورزنه کارشناس ارشد سنجش از دور و سیستم اطلاعات جغرافیایی

in the traditional systems of irrigation and exploitation of water sources, especially the water sources behind dams, there isn't regular and consistent plan for their management and this can be caused the weakness of irrigation performance. in this connection, using both of optimization methods and geospatioal information system (gis) together can improve the performance of irrigation pro...

2015
Na Wang Jinming Liu

In traditional way of rice irrigation in the Heilongjiang region, there are many problems such as huge consumption of water, complex wiring and cold water harm. To improve these problems, the intelligent irrigation control system based on PLC and configuration software is designed. The data acquisition and monitoring of water level and water temperature and other parameters are carried through ...

2017
Sung Ok Hong Gyu-Jo Shim Yong-Dae Kwon

BACKGROUND Postoperative infection occurs when bone graft material is dislodged into the maxillary sinus cavity and most of the patients are often uncomfortable with the drainage and irrigation procedures to eradicate the infection. In this case report, we share a technique in treating patients with such condition. MATERIAL AND METHODS A 47-year-old patient was referred after sinus elevation ...

The study addressed the economic comparison of the achievements of Fadama III agricultural enterprises in the Niger Delta Area of Nigeria using task-target performance approaches. It aimed at identifying the indicators, tasks and targets and achievement of Fadama III. Some materials used were secondary information collected from the various Fadama III project offices. Simple random sampling tec...

2010
P. J. Shouse J. E. Ayars

In the irrigated western U.S. disposal of drainage water has become a significant economic and environmental liability. Development of irrigation water management practices that reduce drainage water volumes is essential. One strategy combines restricted drainage outflow (by plugging the drains) with deficit irrigation to maximize shallow groundwater consumption by crops, thus reducing drainage...

Journal: :journal of agricultural science and technology 2013
n. ferjani m. morri h. daghari

in tunisia, kalâat el andalous irrigated district is one of the most affected areas by salinization. the objective of this study was to predict the root zone salinity (over 10 years) in this area using the saltmod simulation model for subsurface drainage system. saltmod is based on water balance, salt balance model, and seasonal agronomic aspects. in the pilot area, irrigated vegetables crops s...

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