نتایج جستجو برای: drainage water

تعداد نتایج: 585245  

Journal: :تحقیقات اقتصاد و توسعه کشاورزی ایران 0
امید شریفی دانشجوی دکتری دانشگاه تهران و مربی دانشگاه جیرفت روح اله رضایی استادیار دانشکده کشاورزی دانشگاه زنجان سعید غلامرضایی استادیار دانشکده کشاورزی دانشگاه لرستان ناصر برومند استادیار دانشگاه جیرفت

the main objective followed in this research was to study some of the factors influencing water users' participation in management of the irrigation and drainage networks on the lands under jiroft dam. the kind of research method of the study was a descriptive- correlational one. the statistical population of the study consisted of all the water users of irrigation and drainage networks ac...

Journal: :Journal of Soil and Water Conservation 2012

In the study, Drainmod model was used to compare measured water table depth fluctuations on the farm with those simulated by the model, also comparison of measured drainage outflow of the farm drains and model simulated was investigated. This study was made in a part of the Irrigation and Drainage Network of ABADAN Date palms. By statistical analysis of the measured and predicted water table de...

2015
C F Dow B Kulessa I C Rutt V C Tsai S Pimentel S H Doyle D van As K Lindbäck R Pettersson G A Jones A Hubbard

The rapid drainage of supraglacial lakes injects substantial volumes of water to the bed of the Greenland ice sheet over short timescales. The effect of these water pulses on the development of basal hydrological systems is largely unknown. To address this, we develop a lake drainage model incorporating both (1) a subglacial radial flux element driven by elastic hydraulic jacking and (2) downst...

2018
Pratyush Kumar Das

Drainage from mining sites rich in sulfur bearing rocks is known as acid mine drainage (AMD). Acid mine drainage water is a serious environmental pollutant that has its ill effects on plants, animals and microflora of a region. Mine water drainage mainly results due to anthropogenic activities like mining that leave the sulfur bearing rocks exposed. This drainage water poses as a potent soil, s...

2003
Rick Huang

The Algal-Bacterial Selenium Removal (ABSR) system has demonstrated an ability to efficiently remove nitrogen from agricultural drainage water in the San Joaquin Valley. However, it is not known whether the ABSR system can effectively reduce nitrate and nitrite concentrations in drainage water with high levels of salinity. In order to determine whether the ABSR system can be used to treat salty...

Journal: :مدیریت آب و آبیاری 0
سید علی رضا مسعودی دانشجوی کارشناسی ارشد آبیاری و زهکشی، گروه آبیاری و آبادانی، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران، کرج – ایران عبدالمجید لیاقت استاد گروه آبیاری وآبادانی، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران، کرج - ایران

due to the important role of subsurface drainage in managing the ground water level, there are many researches focused on finding a new and more economic way to develop subsurface drainage technologies. lack of proper drainage system in northern iran has caused huge implantation of rice and it is impossible to have second implantation in this region. one reason of insufficiency of current drain...

Journal: :آب و خاک 0

introduction: better use of water and soil resources in paddy fields, increase in rice production and farmer's income, installation of subsurface drainage system is necessary. the main goalof these systems, are aeration conditions improvement prevention of water logging, yield increase, land use increase and multiuse of the land. in different countries, installation of subsurface drainage cause...

ژورنال: علوم آب و خاک 2019

Since 2001, water main drainage of sugarcane farms located in the east side of Karoon River has been deviated to Shadegan lagoon. The average discharge and salinity of the drain water in spring and summer were 20 and 20.5 m3 sec-1 and 17.1 and 13.3 dS m-1, respectively. Therefore, there have been considerable changes in the lagoon water quality when compared to the time before entering the drai...

ژورنال: علوم آب و خاک 2017

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...

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