نتایج جستجو برای: groundwater level drop reasons

تعداد نتایج: 1242594  

Journal: :Water research 2017
Aleksandra Szczuka Kimberly M Parker Cassandra Harvey Erin Hayes Avner Vengosh William A Mitch

Coastal utilities exploiting mildly saline groundwater (<150 mg/L chloride) may be challenged by disinfection byproduct (DBP) formation, a concern likely to increase with sea-level rise. Groundwater from North Carolina coastal aquifers is characterized by large variations in concentrations of halides (bromide up to 10,600 μg/L) and dissolved organic carbon (up to 5.7 mg-C/L). Formation of 33 re...

2006
Mohammad Azizur Rahman Jackson Roehrig

The study area consists of eight upazilas of north-west region of Bangladesh. This is one of the driest parts of Bangladesh, normally less rain from November to April. The study area has been irrigated using about 2100 Deep Tubewells. It covers only about 80% of the total cultivable area. The remaining 20% area has been planned to cover by installation of additional Deep Tubewell under Banglade...

Journal: :محیط شناسی 0
فرناز دانشور وثوقی کارشناسی ارشد رشته عمران آب، دانشکدة عمران دانشگاه تبریز یعقوب دین پژوه دانشیار گروه مهندسی آب، دانشکدة کشاورزی، دانشگاه تبریز

study of groundwater quality trend in any region is very important from the view of scheduling and sustainable water resources management. in the present study trend analysis conducted on groundwater quality based on information of 32 piezometeric stations located in the ardabil plain from 1993 to 2008 using the non-parametric spearman test. hydrogeochemical variables studied here are total ani...

2015
Xianbo Li Rui Zuo Yanguo Teng Jinsheng Wang Bin Wang Andrew C Singer

Increasing pressure on water supply worldwide, especially in arid areas, has resulted in groundwater overexploitation and contamination, and subsequent deterioration of the groundwater quality and threats to public health. Environmental risk assessment of regional groundwater is an important tool for groundwater protection. This study presents a new approach for assessing the environmental risk...

In arid and semi-arid ecosystems shortage of surface water has led to a greater use of groundwater resources. Water table in groundwater due to climate and human intervention is always fluctuating. Assessing change groundwater resource in planning and sustainable management of water resources in each region has of great importance. In this study were investigated changes of water table in the p...

ژورنال: علوم آب و خاک 2004
سید فرهاد موسوی, , علی جعفری ملک‌آبادی, , مجید افیونی, , اردشیر خسروی, ,

In recent decades, the use of nitrogen fertilizers has increased irrespective of their effects on soil properties, agricultural products and, particularly, on environmental pollution. Nitrate easily leaches from soils into groundwater. The objective of this study was to determine temporal and spatial nitrate concentrations in groundwater in agricultural, industrial and urban regions in some par...

Journal: :Misr Journal of Agricultural Engineering 2015

2017
Menglin Zhang Litang Hu Lili Yao Wenjie Yin

Overexploitation of groundwater resources has caused groundwater-related problems all over the world. Effective groundwater governance is a favorable guarantee for its protection and sustainable utilization. Accurate prediction of groundwater level (GWL) or depth to groundwater (GWD) plays an important role in groundwater resource management. Due to the limitations and complexity of numerical m...

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