Determination of retention basin and infiltration well zone for groundwater recharge using GIS-based approach: Case study: Bantaeng regency, South Sulawesi, Indonesia

2017 ◽  
Author(s):  
Luhur Akbar Devianto ◽  
Rusmawan Suwarman ◽  
Asep Rohman ◽  
Rofiq Iqbal
Keyword(s):  
Groundwater Recharge ◽  
South Sulawesi ◽  
Retention Basin

scholarly journals Determination LMWL Wonosobo Area by Using Nuclear Technology, Case Study: Hydrogeology Study for Aqua Danone CSR Program

2018 ◽  
Vol 43 ◽  
pp. 01013
Author(s):  
Agus Budhie Wijatna ◽  
Heru Hendrayana ◽  
Fitrotun Aliyah ◽  
Azwar Satriya Muhammad ◽  
Bungkus Pratikno
Keyword(s):  
Groundwater Recharge ◽  
Nuclear Technology ◽  
Recharge Area ◽  
Environmental Aspect ◽  
Isotope Tracer ◽  
Management Concepts ◽  
Groundwater Reserves ◽  
Corporate Social

Corporate Social Responsibility (CSR) program is one of the management concepts whereby the company integrates social and environmental aspect to support their business as the strategy to achieve the company goals for balancing between economic, social, and environmental imperatives. PT Tirta Investama Danone Aqua, which located in Wonosobo has a core business in supplying natural drinking water. To fulfil its responsibility in conserving nature and groundwater reserves, PT Tirta Investama Danone Aqua has a CSR program called Aqua Lestari. The determination of the receiving area of the CSR program should review and analyzed in order the CSR programs is not misplaced. PT Tirta Investama wants the CSR program to be given to the groundwater recharge areas for maintaining groundwater reserves sustainability. Therefore, a comprehensive study concluded to determine the groundwater recharge area studied from the aspects of geology, hydrogeology, and hydro isotope. The application of nuclear technology especially for stable isotope tracer can be used to know the groundwater recharge area, and modeling the flow of subsurface groundwater. Local Meteoric Water Line (LMWL) is used for analysis of groundwater recharge area. The equation of LMWL Wonosobo is δD, ‰ = 8,102 * δ18O + 14,21‰.

A novel method for the determination of linting propensity of paper

TAPPI Journal ◽  
2012 ◽  
Vol 11 (10) ◽  
pp. 9-17
Author(s):  
ALESSANDRA GERLI ◽  
LEENDERT C. EIGENBROOD
Keyword(s):  
Ash Content ◽  
The Novel ◽  
Offset Printing ◽  
Excellent Correlation ◽  
End Conditions ◽  
Bottom Side ◽  
Novel Method ◽  
Total Fraction

A novel method was developed for the determination of linting propensity of paper based on printing with an IGT printability tester and image analysis of the printed strips. On average, the total fraction of the surface removed as lint during printing is 0.01%-0.1%. This value is lower than those reported in most laboratory printing tests, and more representative of commercial offset printing applications. Newsprint paper produced on a roll/blade former machine was evaluated for linting propensity using the novel method and also printed on a commercial coldset offset press. Laboratory and commercial printing results matched well, showing that linting was higher for the bottom side of paper than for the top side, and that linting could be reduced on both sides by application of a dry-strength additive. In a second case study, varying wet-end conditions were used on a hybrid former machine to produce four paper reels, with the goal of matching the low linting propensity of the paper produced on a machine with gap former configuration. We found that the retention program, by improving fiber fines retention, substantially reduced the linting propensity of the paper produced on the hybrid former machine. The papers were also printed on a commercial coldset offset press. An excellent correlation was found between the total lint area removed from the bottom side of the paper samples during laboratory printing and lint collected on halftone areas of the first upper printing unit after 45000 copies. Finally, the method was applied to determine the linting propensity of highly filled supercalendered paper produced on a hybrid former machine. In this case, the linting propensity of the bottom side of paper correlated with its ash content.

The Calculation of Turbulent Diffusion Coefficients in Aquatic Ecosystems

2019 ◽  
Vol 70 (11) ◽  
pp. 3903-3907
Author(s):  
Galina Marusic ◽  
Valeriu Panaitescu
Keyword(s):  
Transport Equation ◽  
Turbulent Diffusion ◽  
Diffusion Coefficients ◽  
Aquatic Ecosystems ◽  
Specific Area ◽  
Left Bank ◽  
The Right ◽  
Prut River

The paper deals with the issues related to the pollution of aquatic ecosystems. The influence of turbulence on the transport and dispersion of pollutants in the mentioned systems, as well as the calculation of the turbulent diffusion coefficients are studied. A case study on the determination of turbulent diffusion coefficients for some sectors of the Prut River is presented. A new method is proposed for the determination of the turbulent diffusion coefficients in the pollutant transport equation for specific sectors of a river, according to the associated number of P�clet, calculated for each specific area: the left bank, the right bank and the middle of the river.

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