نتایج جستجو برای: groundwater resources drought

تعداد نتایج: 321471  

Amin Jahangard, Azadeh Ghobadi,

Background & Aims of the Study: Heavy metals are one of the most important environmental pollutants which agricultural and industrial activities and urban development increased their entry rate to the underground resources. This study aimed to investigate the concentration of chromium, nickel and manganese in groundwater resources in Asadabad plain....

2011
Dong Liu Miao Yu Nan Sun Ying Qi

Dong Liu, Miao Yu, Nan Sun, Ying Qi (School of Water Conservancy & Civil Engineering,Northeast Agricultural University, Harbin Heilongjiang 150030,China) Abstract:In the course of analyzing and forecasting regional groundwater depth, its variation process complexity was ignored in the past, so that it was difficult to realize scientific management of groundwater resources. Aiming at the aforesa...

2012
C. I. Wong M. Musgrove

Please cite this article in press as: Wong, C.I., et Hydrol. (2012), http://dx.doi.org/10.1016/j.jhyd Understanding the sources and processes that control groundwater compositions and the timing and magnitude of groundwater vulnerability to potential surface-water contamination under varying meteorologic conditions is critical to informing groundwater protection policies and practices. This is ...

ژورنال: علوم آب و خاک 2010
زیبایی, منصور , محسن پور , رباب ,

Drought is among the most costly weather-related events and Iran is highly vulnerable to the economic, social and environmental impacts of drought In this study expected profit maximization model and utility efficient programming were applied to determine optimal crop pattern, expected gross margin and water use with and without, drought condition at representative farms of homogenous groups. T...

Journal: :archives of hygiene sciences 0
azadeh ghobadi young researchers and elite club, hamedan branch, islamic azad university, hamedan, iran. amin jahangard young researchers and elite club, hamedan branch, islamic azad university, hamedan, iran.

background & aims of the study: heavy metals are one of the most important environmental pollutants which agricultural and industrial activities and urban development increased their entry rate to the underground resources. this study aimed to investigate the concentration of chromium, nickel and manganese in groundwater resources in asadabad plain. materials & methods: sampling of groundwater ...

2008
Shiqin Wang Jingli Shao Xianfang Song Yongbo Zhang Zhibin Huo Xiaoyuan Zhou

MODFLOW is a groundwater modeling program. It can be compiled and remedied according to the practical applications. Because of its structure and fixed data format, MODFLOW can be integrated with Geographic Information Systems (GIS) technology for water resource management. The North China Plain (NCP), which is the politic, economic and cultural center of China, is facing with water resources sh...

2015
Jinfeng Wang Yanchun Gao Sheng Wang Assefa M. Melesse

Groundwater resources are becoming the primary factor for maintaining life in arid areas. Understanding land use/cover change and its effect on groundwater depth would enhance land use and groundwater management for typical desert-oasis transition zones. Reduction of groundwater recharge and increase of groundwater exploitation during 1985 and 2010 led to the decrease of groundwater depth in Li...

Journal: :نشریه علمی - پژوهشی هیدرولوژی کاربردی 0
mohammad rostami khalaj faculty of natural resources, university of tehran, karaj, i.r. iran mohsen mohseni saravi faculty of natural resources, university of tehran, karaj, i.r. iran dana hesami faculty of natural resources, university of tehran, karaj, i.r. iran hossein salmani department of watershed management engineering, gorgan university of agricultural sciences and naturalresources, gorgan, iran mostafa rashidpour faculty member of haraz university

in many urban areas, groundwater has been exploited neglecting to wet and dry periods owing to of surface water deficit. in this study, using the percent of normal rainfall index, 36 year (1971-2008) were studied and a drought event and a wet event were determined. the reason to choose two consecutive years is the effect of early wet period on groundwater quality. physicochemical characteristic...

2015
Shuwei Qiu Xiujuan Liang Changlai Xiao Fengchao Lv

In order to evaluate the groundwater resources and aquifer system of the Jilin urban area (JUA), a groundwater numerical flow model was established by using the groundwater modeling system based on data from 190 boreholes. River stages were interpolated to control the groundwater flow field. The input parameters such as hydraulic conductivity and specific yield were based on data from 260 pumpi...

Drought and overexploitation of groundwater should control the aquifer properties (e.g. storage coefficient and transmisivity). The role of stress factors is identified when the performance of aquifer hydrodynamic coefficients be studied. Since in the most aquifers, allocation and utilization management is based on the pumping test in the past, it would not be expected the optimal management. I...

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