نتایج جستجو برای: depletion of water table

تعداد نتایج: 21226867  

Journal: :Journal of Range Management 1982

Journal: :مهندسی بیوسیستم ایران 0
مجید نامداری دانشگاه تهران، پردیس کشاورزی و منابع طبیعی، دانشکده مهندسی و فناوری، گروه ماشین ها شاهین رفیعی استاد گروه ماشین های کشاورزی پردیس کشاورزی و منابع طبیعی دانشگاه تهران سلیمان حسین پور استادیار گروه ماشین های کشاورزی پردیس کشاورزی و منابع طبیعی

environmental impact assessment is an important approach to achieve sustainable development. this study has investigated the environmental impact of sugar beet production. in addition data envelopment analysis was applied for detecting efficient units and decrease environmental impacts. in this study final environmental index of impact category consist of global warming, acidification, eutrophi...

2017
Navjot S. Brar Anil Kumar Balwinder Kumar

The predominance of rice-wheat cropping system in Punjab has resulted in number of ecological problems in the state such as depletion of underground water table, deterioration of soil health by adversely affecting the physical, chemical and biological properties of the soil (Kumar et al., 2016). However, for over a decade, ricewheat cropping system yields in high productivity zones have either ...

Journal: :Journal of Environmental Planning and Management 2022

Groundwater depletion is a problem in many parts the world. We developed an approach to investigate drivers of groundwater data-scarce regions. The combines natural and human-induced drivers, with latter focusing on link between human activities government policies. tested Wadi Zabid, Yemen. Forty years rainfall-runoff data were analyzed, alongside changes land cover, abstraction related No dec...

K. Belhassan

This paper investigates the relationship between river flow, rainfall and groundwater pumpage in the Mikkes stream during the period 1968-2009. The Mikkes basin is located in the north center of Morocco and consists of three different zones that represent diversified geologies. This basin includes a phreatic and confined aquifer in Saïs basin and a shallow aquifer in the Tabular Middle Atlas. A...

Journal: :تحقیقات مهندسی کشاورزی 0
منصور پاره کار استادیار مؤسسه تحقیقات فنی و مهندسی کشاورزی علی نشاط دانشجوی دوره دکتری آبیاری، واحد علوم و تحقیقات دانشگاه آزاد اسلامی، تهران فریدون کاوه دانشیار دانشگاه آزاد اسلامی، واحد علوم و تحقیقات

evaporation from the soil surface has an important role in the water balance model in nature, so that the major part of rain fall and irrigation water in arid and semi-arid regions is lost via evaporation from the soil surface. in such areas, there are some regions with high water table and because of evaporation from the soil surface, salts accumulation also occur in the soil surface. so evapo...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه بیرجند - دانشکده علوم انسانی 1389

abstract amino acids are building blocks of proteins, and play a vital role in living beings existence and their functionality. the interaction of these compounds with metal ions is of great importance to biochemists, and chemists, because their functions can be utilized as a model in understanding enzymes mechanism for transport of metal ions to tissues. among twenty essential amino acids w...

Journal: :کشاورزی (منتشر نمی شود) 0
حمیده نوری دکترای مهندسی آب، گروه مهندسی آبیاری و زهکشی، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران، تهران عبدالمجید لیاقت دانشیار، گروه مهندسی آب، گروه مهندسی آبیاری و زهکشی، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران، تهران

a field study was conducted to evaluate the possibility of using water table control techniques in the semi arid region of iran with special attention to its salinity management. the wtm consisted of three subirrigation treatments with water table controls set at 0.3, 0.5 and 0.7 m from the soil surface and a free drainage (fd) treatment. the electrical conductivity (ec) of water was 1.5 ds/m. ...

Journal: :iran agricultural research 2012
s. amin m. r. farjoud a. shabani

lack of sewage collection systems, percolation of surface waters, and seepage of wells have raised the groundwater table in shiraz area in the south of iran. the growing population generates environmental pollution resulting in the degradation of the quality of surface and groundwaters used for agriculture. inorganic and organic pollutants have been traced in shiraz water resources. heavy metal...

Journal: :Water Resources Research 1999

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