scholarly journals Indication of Groundwater Contamination Using Acesulfame and Other Pollutants in a Rural Area of Korea

Water ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1731 ◽  
Author(s):  
Chung-Mo Lee ◽  
Se-Yeong Hamm ◽  
Sul-Min Yun ◽  
Jeong-Eun Oh ◽  
MoonSu Kim ◽  
...  
Keyword(s):  
Groundwater Modeling ◽  
Nitrogen Concentration ◽  
Quality Analysis ◽  
Visual Modflow ◽  
Surrounding Environment ◽  
Model Domain ◽  
Inorganic Matter ◽  
Potential Indicator ◽  
Transport Path ◽  
Chemical Products

Approximately 40,000 chemical products are currently used in Korea; these products can contaminate the groundwater/soil, the surrounding environment, and organisms for extended periods of time. In this study, a hydrological field survey, a water quality analysis, and groundwater modeling were performed to identify the source and transport path of pollution that was caused by inorganic matter and artificial sweeteners, especially acesulfame, in the groundwater of an agricultural area in Chungnam Province, Korea. In the study area, a higher concentration of acesulfame displayed a spatial distribution similar to nitrate-nitrogen concentration. The characteristics of the groundwater flow and the distribution of the acesulfame were simulated using the Visual MODFLOW Classic Interface ver. 2014.1 and the MT3DMS module, respectively. The modeled area was divided into hilly (southern), residential (northwest), and agricultural (northeast) zones. The stream’s boundary was set to be the drainage channel in the southern hilly zone. From the simulation, we found that acesulfame spread actively from the source for 1–3 years before it reached equilibrium in the northern part of the model domain (the area downstream of the stream’s boundary). The concentration of acesulfame in the agricultural zone of the model domain decreased after five years, and it reached the steam boundary and residential zone within 10 years. After 10 years, most of the acesulfame was discharged from the agricultural zone and the hilly zone, while the concentration in the residential zone was approximately the same. Acesulfame is considered to be a potential indicator of man-made contamination for use in the management of groundwater quality.

scholarly journals A Groundwater Modeling on Hard Rock Terrain by using Visual Modflow Software for Bangalore North, Karnataka, India

2019 ◽  
Vol 8 (12) ◽  
pp. 1473-1478
Keyword(s):  
Groundwater Modeling ◽  
Transient State ◽  
Distributed Model ◽  
Visual Modflow ◽  
Pumping Wells ◽  
Digital Elevation ◽  
Geological Information ◽  
Set Up ◽  
Elevation Model ◽  
Observation Wells

The present study investigated through mathematical modelling techniques (using Modflow) for the Bengaluru North zone. The present study carried out in Bengaluru North Taluk lies in between 12° 52’ N to 130 15’ N, 770 22’ E to 770 50’ E to assess the changes in groundwater heads due to enormous pressure on water availability (especially in groundwater) in the study area for a scientific planning and management of water resources. The present study carried out using mathematical distributed model Modflow, to set up, execute the model, requires several data of which study area boundary (.shp format), geological information to represent the geological layers in to the model using Digital Elevation Model (DEM) obtained from Cartosat I Ver. 3R (Bhuvan site), pumping wells, observation wells etc. Shows the head variation in the study area before adding pumping wells and after adding pumping wells. The final observed and simulated results of the groundwater heads in the Bengaluru North taluk under transient state condition

scholarly journals IDENTIFIKASI KESULITAN BELAJAR SISWA PADA MATA PELAJARAN IPA KELAS V DI SD MUHAMMADIYAH SEMINGIN

2018 ◽  
Vol 1 (3) ◽  
pp. 208
Author(s):  
Nurhikmah Nurhikmah ◽  
Ika Maryani
Keyword(s):  
Student Learning ◽  
Learning Difficulties ◽  
External Factors ◽  
Male Students ◽  
Quality Analysis ◽  
Scientific Language ◽  
Internal Factors ◽  
Surrounding Environment ◽  
The Subject ◽  
Science Material

This study aimed to find out how to identify student learning difficulties in grade V science subjects at SD Muhammadiyah Semingin. This research is a type of qualitative research. The subject of research is the class teacher's and all of the V students of SD Muhammadiyah Semingin which amounted to 14 students, 10 male students and 4 female students. The object of research is identifying student learning difficulties. The data collection techniques in the form of observation, interviews and documentation. The data analysis tehnuque using descriptive quality analysis. The results showed that learning difficulties were caused by 1) the difficulty of difficult science material that often uses scientific language, 2) learning difficulties lack of concentration while studying, 3) learning difficulties arising from internal factors and external factors. Student internal factors include psycho-physical impairment or lack of students (cognitive, affective, and psychomotor). While the external factors of students include all the situations and conditions of the surrounding environment that do not support student learning activities. Learning difficulties must be taken in several stages of activities such as 1) Identifying students who are expected to experience learning difficulties; 2) Determine the factors causing learning difficulties; 3) Determine how to overcome them.

scholarly journals STUDY ON APPLICATION OF WASP MODEL FOR SIMULATING WATER QUALITY OF DAU TIENG RESERVOIR

2009 ◽  
Vol 12 (2) ◽  
pp. 5-16
Author(s):  
Ha Thi Van Nguyen ◽  
Quynh Vu Nhu Tran ◽  
Satoshi Takizawa
Keyword(s):  
Water Quality ◽  
Input Data ◽  
Natural Process ◽  
Quality Analysis ◽  
Water Quality Analysis ◽  
Surrounding Environment ◽  
Water Stratification ◽  
To Receive ◽  
Model Water

Based on some measurementS conducted at different timeS and different locations, the environmental managers need the model to imitate the natural process ocurred in the surrounding environment at different times. They are the tools to receive signs about possible existing status of environment which affected by human activities. This paper will present the summary of the preleminary application of the WASP model (Water Quality Analysis Simulation Program) developed by the USEPA to simulate water quality of Dau Tieng Reservoir. The results showed that the WASP model could be used for imitating and predicting water quality of reservoirs. However, in order to improve its application capacity and the precise of the model results, the input data, especially, water stratification and flow are important factors needed to be improved.

PROSPEK USAHA INOVASI SPEAKER DAN PAJANGAN UNIK UPAYA PEMANFAATAN LIMBAH GULUNGAN KERTAS

2019 ◽  
Vol 2 (2) ◽  
pp. 171
Author(s):  
Saputri Rizki Ramadhanti ◽  
Joti Dina Kartikasari ◽  
Alfian Muttoqim Muttoqim ◽  
Umi Farida Farida ◽  
Amanda Oktaviani Amanda
Keyword(s):  
College Students ◽  
Social Media ◽  
Economic Value ◽  
Waste Paper ◽  
Direct Selling ◽  
Paper Waste ◽  
Entrepreneurial Spirit ◽  
Surrounding Environment ◽  
Business Opportunities ◽  
New Business

The amount of paper waste, especially paper waste of yarn rolls in the socks manufactured factory and the convection industry that has not been used to get high economic value is an opportunity to open a new business, especially in the electronic and art craft product. SEPIK PANIK (Speaker of Music and Unique Display of Waste Paper Rolls) is an innovation from processing paper waste to be a unique speaker. The purposes of this program are: 1) Utilizing paper waste to get high selling value. 2) Creating handmade products from paper waste into speakers as well as unique creative display. 3) To accommodate the desire of college students who have entrepreneurial spirit and artistic creations to open new business opportunities. The method of make this SEPIK PANIK product includes 1) Making paper tube of speaker and 2) Making a Unique Display. The Sales of this product have been carried out during May to August 2019, products that have been sold are 34 units, obtained a profit of Rp. 1.170,000. Sales and promotion methods are carried out both online through social media and offline, namely direct selling and consignment. Based on these results, this business is very profitable and can benefit the surrounding environment.

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