نتایج جستجو برای: high groundwater levels

تعداد نتایج: 2751059  

Journal: :Eng. Appl. of AI 2012
Riccardo Taormina Kwok-Wing Chau Rajandrea Sethi

Artificial Neural Networks (ANNs) have been successfully employed for predicting and forecasting groundwater levels up to some time steps ahead. In this paper, we present an application of feed forward neural networks (FFNs) for long period simulations of hourly groundwater levels in a coastal unconfined aquifer sited in the Lagoon of Venice, Italy. After initialising the model with groundwater...

One of the most important factors, in a good management in any field, is having a proper perspective of the upcoming events. There is no exception in water resources management and the environment and awareness of the condition of water resources, in an area, plays a decisive role for planning water and agriculture. In this study, the Adaptive Neural Fuzzy Inference System (ANFIS) was used for ...

2014
Shaogang Dong Baiwei Liu Huamin Liu Shidong Wang Lixin Wang

In the rubber dam's impact area, the groundwater total hardness (TH) has declined since 2000, ultimately dropping to 100-300 mg/L in 2012. pH levels have shown no obvious changes. NH4-N concentration in the groundwater remained stable from 2000 to 2006, but it increased from 2007 to 2012, with the largest increase up to 0.2 mg/L. NO3-N concentration in the groundwater generally declined in 2000...

Monitoring of Meteorological and groundwater droughts and determining of the lag time between these two types of droughts in spatial various locations can help in consumption management and protection of the groundwater resources. In this study, spatial and temporal changes of droughts were analyzed using the Standard Precipitation and Groundwater Resource Indices (SPI & GRI) in the northern Ma...

Journal: :محیط شناسی 0
مرجان عبدالهی کارشناس ارشد رشتۀ زمین شناسی زیست محیطی، دانشکدۀ علوم زمین، دانشگاه شاهرود افشین قشلاقی استادیار، دانشکدۀ علوم زمین، دانشگاه شاهرود احمد عباس نژاد دانشیار، گروه زمین شناسی، دانشگاه شهید باهنر کرمان

introduction groundwater resources in arid-semiarid zones universally suffer from problems of over-abstraction and declining water tables. in addition to the issues related to quantity, degradation of groundwater quality now assumes major importance in the arid and semiarid regions. in such areas, natural factors such as the low precipitation, combined with high evapotranspiration, result in hi...

2012
Riccardo Taormina Kwok-wing Chau Rajandrea Sethi

20 21 Artificial Neural Networks (ANNs) have been successfully employed for predicting and 22 forecasting groundwater levels up to some time steps ahead. In this paper, we present an 23 application of feed forward neural networks (FFNs) for long period simulations of hourly 24 groundwater levels in a coastal unconfined aquifer sited in the Lagoon of Venice, Italy. After 25 initializing the mode...

Journal: :desert 2014
zohreh kheradpisheh seyed ali almodaresi yasamin khaksar lida rafati

groundwater quality management is one of the most important issues in many arid and semi-arid regions, including iran.nitrate (no3-) is one of the most common anions contaminating groundwater. this study aimed to range nitrateconcentrations in water resources in bahabad plain in yazd province. to evaluate the nitrate data in this descriptive study,260 nitrate samples from 13 wells in bahabad we...

2012
Fardin Boustani

Groundwater resources in Arsanjan plain provide water for agriculture, industry, and human consumption. Continued agricultural development in this area needs to additional groundwater resources for, particularly during of drought periods, and effects on the quantity and quality of ground water available. The purpose of this study is to evaluate water level changes in the aquifer of Arsanjan pla...

Journal: :Environmental science & technology 2009
Hannah Chiew M L Sampson Sokhan Huch Sreymom Ken Benjamin C Bostick

Naturally occurring arsenic in groundwater in Cambodia is a serious health concern. This study tested the efficacy of a BioSand filter amended with iron nails, Kanchan filter, as a household water treatment option with three natural arsenic-bearing groundwater sources of varying compositions and spiked with lab cultured E. coli and MS2. The effectiveness of arsenic and pathogen removal was not ...

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