نتایج جستجو برای: groundwater decline

تعداد نتایج: 118576  

ژورنال: سلامت و محیط زیست 2018

Background and Objective: Drought and water shortage in recent years caused rice farmers to use maximum groundwater as a secure source. However, the rice is affected not only by the quantity but also by the quality of water. The purpose of this study was to evaluate trend of quality parameters of groundwater in wet and dry periods in 4 plains including Astaneh, Talesh, Lahijan and Foumanat, whi...

2004
Eloise Kendy Yongqiang Zhang Changming Liu Jinxia Wang Tammo Steenhuis

Effective management of limited water resources in the North China Plain requires reliable calculation of historical groundwater balances at local, sub-watershed scales. These calculations typically are hindered by poorly constrained recharge estimates. Using a simple soil-water balance model, we independently calculated annual recharge from irrigated cropland to unconfined alluvial aquifers un...

Journal: :Geosciences 2023

In the Willcox Groundwater Basin (WGB), increasing rates of agricultural groundwater withdrawal have led to significant regional level decline, threatening basin’s long-term water resource security. Updated characterization conditions and demand is critically important for informing management efforts. We developed hydrogeologic framework WGB linked data with land cover classification provide a...

ژورنال: علوم زمین 2018
Ali Saremi Amir Pouya Sarraf Hossien Sedghi Mahasa Roustaei Mojtaba Arjomandi

During recent years, groundwater exploitation and thereby decreasing hydraulic head in the compressible sedimentary aquifer which is placed in the district 19 of Tehran have been caused noticeable land subsidence. The land subsidence has been damaging the infrastructures which have been being built in the south of Tehran Basin, especially in the district 19 of Tehran. A finite-difference ground...

1999
Christopher H. Swartz Philip M. Gschwend Ralph M. Parsons

The release of colloids to groundwater was investigated in situ in an ironoxyhydroxide-rich, sandy aquifer. Groundwater amended with various solutes was injected into and immediately withdrawn from the shallow aquifer. Turbidity and colloid composition were monitored in the retrieved injectate. The response of the aquifer material to the amendments generally mimicked that observed in an earlier...

ژورنال: علوم آب و خاک 2016
آلبوعلی, علی, صادقی, سیدهادی, قضاوی, رضا,

Nowadays, the increasing population and water demand in various sectors of agriculture, industry, drinking and sanitation has brought about tremendous pressure on groundwater resources. Changes in groundwater quality and salinity of the water resources are currently major threats to development, especially in the dry and too dry lands. The aim of this study is evaluation of the trend of changes...

Mohammad Reza Jebraeili Parvin Zarei,

During recent years, increasing exploitation of groundwater aquifers has caused a substantial and sharp drop in groundwater table in the plains of Iran. Artificial discharge of aquifer using flood spreading in plains is an approach that has been implemented in many parts of the country so far. In this method, by flowing flood into the aquifer, will control flooding and soil conservation. In add...

2006
Yonghong Hao Tian-Chyi J. Yeh Zongqiang Gao Yanrong Wang Ying Zhao

Gray system theory uses a black-gray-white color spectrum to describe a complex system whose characteristics are only partially known or known with uncertainty. In this study, we use gray system theory to investigate the relation between precipitation and spring flows in a karst region in China. The gray incidence analysis was applied to the Liulin Springs, Shanxi Province, China to analyze the...

ژورنال: طلوع بهداشت یزد 2012
اکرامی, محمد, اختصاصی, محمدرضا , شریفی, ذبیح اله , ملکی نژاد, حسین ,

Abstract Background: Nowadays, with population growth and the increase of water demand in different sectors of agriculture, industry, drinking, and health, groundwater resources have faced a lot of pressure. This issue along with severe and prolonged droughts has created the conditions for country particularly for arid and hyper arid areas which has encountered the serious challenges in the ...

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