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| Registros recuperados: 100 | |
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| Dahri, Shahzad Hussain; Mangrio, Munir Ahmed; Shaikh, Irfan Ahmed; Dahri, Zakir Hussain; Syed, Ain-ul-Abad; Jakhrani, Jazib Hussain; Syed, Taimoor Ali. |
| This experiment aimed to determine the crop evapotranspiration (ETc), groundwater input in total water used by wheat crop, and to simulate the CROPWAT model to envisage the crop evapotranspiration rate. To estimate on-field ETc and groundwater contribution the combining lysimeter technique was used. The water levels below the soil surface were kept at 1.60, 2.20, and 2.80 m and each water table depth was replicated three times. The experiment was conducted under silt loam (SL) and silty-clay loam (SCL) soil conditions. The climatic parameters and water balance components were recorded accordingly. The on-field ETc was compared with the predicted ETc by CROPWAT model. Under SL soil, the observed ETc was 442, 427, and 401 mm at the water table depth of 1.60,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water conservation; Irrigation amount; Groundwater; And Crop evapotranspiration. |
| Ano: 2021 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6605 |
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| Islam,Jahidul; Hakim,Abdul; Hanafi,Mohamed Musa; Juraimi,Abdul Shukor; Sarkar,Ratna Rani; Hossain,AKM Mosharof; Chowdhury,Indira; Ali,Jafor; Kashem,Abul. |
| Groundwater quality analyses included pH, EC, cations (Ca2+, Mg2+, Na+, K+, Zn2+, Cu2+, Mn2+, Fe3+ and As3+), anions (CO32-, HCO3-, NO3-, SO42-, PO43- and Cl-) and TDS of northwestern Bangladesh. The samples contained Ca2+, Mg2+ and Na+ as the dominant cations and HCO3- and Cl- were the dominant anions. Ratios of major cations and anions of water samples suggest the predominance of Ca and Mg-containing minerals over Na-containing minerals. According to TDS and SAR values, all samples were classed as 'freshwater' and 'excellent' categories. The SSP of all waters was under 'excellent' and 'good' classes. All samples were within 'soft' class regarding hardness with 'suitable' RSC. Based on As3+, Zn2+, Mn2+, Fe3+, SO42-, NO3- and Cl- all groundwater samples... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Groundwater; Suitability; Northwestern Bangladesh. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782014000701210 |
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| Fusconi,Roberta; Godinho,Mirna Januária Leal. |
| The microbial populations of groundwaters were analyzed in a region under the influence of a landfill (piezometer L12) in the town of São Carlos, São Paulo, Brazil, and in an area not influenced by the landfill (piezometer L5). Heterotrophic bacteria were counted by spread plate method and the number of protozoa was estimated by the most probable number method. There was a larger number of organisms in well L12, with a mean value of 15.76 x 104 CFU/ml for bacteria and 9.7 MPN/ml for protozoa, whereas the mean values for piezometer L5 were 2.88 x 104 CFU/ml for bacteria and 3.4 MPN/ml for protozoa. The greater abundance detected in piezometer L12 may be related to the influence of the leachate through the landfill on the microbial populations, also... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bacteria; Protozoa; Groundwater; Landfill. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37141999000300003 |
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| Perez Blanco, Carlos Dionisio; Gomez Gomez, Carlos Mario. |
| Water is a key input in the production of many goods and services and under certain conditions can become a critical limiting factor with significant impacts on regional development. This is the case of many agricultural European Mediterranean basins, where water deficit during drought events is partially covered by illegal abstractions, mostly from aquifers, which are tolerated by the authorities. Groundwater overexploitation for irrigation has created in these areas an unprecedented environmental catastrophe that threatens ecosystems sustainability, urban water supply and the current model of development. Market-based drought insurance systems have the potential to introduce the necessary incentives to reduce overexploitation during drought events and... |
| Tipo: Presentation |
Palavras-chave: Drought insurance; Stochastic models; Groundwater; Agriculture; Risk and Uncertainty; Q15; Q18; Q25; Q51; Q58. |
| Ano: 2012 |
URL: http://purl.umn.edu/122453 |
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| Cobourn, Kelly M.. |
| A key feature of hydrologically connected surface and groundwater stocks is the two-way exchange of water between the systems. Increasing water scarcity, particularly in arid environments, has spurred debate on how to coordinate management of the two resources. In this paper, I present a model that describes the dynamic feedback loop between surface and groundwater systems when economic agents withdraw water from both for use in production. I use the model to describe optimal water extraction from both stocks and to evaluate how a conjunctive management policy shifts welfare between surface and groundwater user groups. Finally, I explore the importance of accounting for two-way feedback between the two stocks, when it exists, in estimating the benefits to... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Groundwater; Conjunctive management; Dynamic optimization; Gisser-Sanchez effect; Resource /Energy Economics and Policy. |
| Ano: 2011 |
URL: http://purl.umn.edu/103893 |
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| Registros recuperados: 100 | |
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