• Title/Summary/Keyword: Water sampling

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The Effects of Exercise Commitment of University Water Sport Participants on Re-participation Intentions

  • HUR, Seung Eun;OH, Chae Yun;JIN, Su Yeon;MOON, Hwang Woon
    • Journal of Sport and Applied Science
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    • v.4 no.4
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    • pp.19-25
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    • 2020
  • Purpose: Today, participation rate of water sport has been dramatically increased due to expansion of leisure time and concerns. The purpose of this study is to identify the effect of the exercise commitment of university water sport participants on re-participation intentions and to induce insights for expanding water sport industry. Research design, data, and methodology: Subjects were collected from undergraduate students who participated water sports class in University. The sample was extracted by purposive sampling of nonprobability sampling method. To achieve the purpose of the research, survey was processed to 281 subjects. SPSS Version 21.0 was used to analyze the data. All statistical significance level was set to p<.05. In terms of measurement, items of demographic information, exercise commitment, and re-participation intentions were utilized. Results: The results are as follows. Frist, in the difference in exercise commitment and re-participation intention according to the grade, only the re-participation intention was significant. The effects of the exercise commitment of university water sport participants on re participation intentions were statistically significant. Conclusions: The findings indicate the function of sport club participants' commitment towards water sports in promoting their intentions to re-participation. The study suggested insights and future directions for expanding water sport markets and related industry.

Evaluation of the Bacteriological Safety for the Shellfish Growing Area in Jaranman.Satyangdo Area, Korea (자란만.사량도 패류생산해역의 위생학적 안전성 평가)

  • Shim, Kil-Bo;Ha, Kwang-Soo;Yoo, Hyun-Duk;Kim, Ji-Hoe;Lee, Tae-Seek
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.42 no.5
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    • pp.442-448
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    • 2009
  • Bacteriological examination of a 12,700 ha area within Jaranman Saryangdo area, located in Jaran bay and Saryangdo island, was conducted with 35 fixed (designated areas and adjacent areas) seawater sampling stations between January 2006 and December 2008. According to results, the geometric mean range and the estimated 90th percentile range of fecal coliform counts in sea water samples collected in the designated area were <1.8-2.4 and <1.8-8.6 MPN/100mL, respectively. The estimated 90th percentile range of fecal coliform counts in sea water samples collected from 6 sampling stations in the adjacent areas were 6.1-34.6 MPN/100mL. Based on these results, bacteriological water quality of the designated areas in the Jaranman. Saryangdo area meet the NSSP (National Shellfish Sanitation Program) guidelines for approved area. The bacteriological sea water quality in Jaranman.Saryangdo area has been shown to be favorable at all investigated sampling stations except for July and August which coincided with heavy rainfall. In fact, the bacteriological water quality was not affected if rainfall was less than 30 mm rainfall. However, the degree of bacteriological contamination increased rapidly and the water quality exceeded approved NSSP guidelines set for rainfall above 60 mm.

Analysis of Water Quality and Heavy Metals for Surface Water and Sediments of Upstream and Midstream in Nakdong River (낙동강 중 · 상류지역 하천의 표류수 및 퇴적층의 중금속 및 수질분석)

  • Ri, Chang Seop
    • Journal of the Korean Chemical Society
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    • v.44 no.6
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    • pp.547-555
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    • 2000
  • The surface water in the upstream and midstream of Nakdong river, which is being used as tap water and industrial water supply in Daegu city and Kyungpook province, was analyzed in its water quality. In addition, the sediments of which was analyzed in terms of heavy metal and organic substance contents. All the sampling was done in the drought season for 2 days of June 22-23 and carried out in 10 sampling sites. The sites cover the whole Kyungpook provincial region, starting from Yangsam Bridge in Chyeong Ryang Provincial Park as the upper end, to the Ko Ryung Bridge as the lower end sampling site of Nakdong river that flows through Kyungpook province. The 22 items including $NH^{+}_{4}$, $NO^{-}_{2}$ and COD were analyzed for surface water and 11 items including organic constituents(trichloroethylene, etc) and heavy metals were analyzed for sediments. The sediments samples were analyzed by elution testing method and acid dissolution method and then the results were compared with each other. All heavy metals in samples were determined by Inductively Coupled Plasma-Atomic Emission Spectroscopy(ICP-AES) and other constituents were analyzed by standard testing methods of the Korean Ministry of Environment.

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Low Flow Estimation for River Water Quality Models using a Long-Term Runoff Hydrologic Model (장기유출 수문모형을 이용한 하천수질모형의 기준유량 산정)

  • Kim, Sangdan;Lee, Keon Haeng;Kim, Hung Soo
    • Journal of Korean Society on Water Environment
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    • v.21 no.6
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    • pp.575-583
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    • 2005
  • In this study the flow curve estimation is discussed using TANK model which is one of hydrologic models. The main interest is the accuracy of TANK model parameter estimation with respect to the sampling frequency of input data. For doing this, input data with various sampling frequencies is used to estimate model parameters. As a result, in order to generate relatively accurate flow curve, it is recommendable to measure stream flow at least every 8 days.

Measurement of Dry Deposition Flux of Air Pollutants to the Waterbody (수체로의 대기오염물질 건식침적량 측정)

  • 김영성;진현철;김용표
    • Journal of Korean Society for Atmospheric Environment
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    • v.20 no.3
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    • pp.421-426
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    • 2004
  • Dry deposition fluxes of inorganic acidic species to the waterbody were measured by the dry deposition sampler (DDS). DDS was composed of three pans filled with pure water. An average concentration increase during the sampling time, after removing an abnormal value if existed, was considered as the input by deposition. Important operation parameters such as the amount of water used and sampling time were determined through a series of laboratory experiments. The deposition flux measured by DDS was compared with that by the water surface sampler developed by Yi et ai. (1997a,b).

BASELINE MEASUREMENTS ON THE PERFORMANCE OF FOUR CONSTRUCTED WETLANDS IN TROPICAL AUSTRALIA

  • Fell, A.;Jegatheesan, V.;Sadler, A.;Lee, S.H.
    • Environmental Engineering Research
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    • v.10 no.6
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    • pp.316-327
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    • 2005
  • Constructed wetlands provide several benefits that are not solely limited to storm water management and are becoming common in storm water management. In this research, four recently constructed wetlands underwent in situ and laboratory water sampling to determine their efficiency in removing storm water pollutants over a 5-month period. From the sampling results, it was determined that each of the wetlands was able to reduce the concentration of pollutants in the stormwater. To aid in the assessment of the wetlands against each other, a model was developed to determine the extent of removal of stormwater pollutants over the length of the wetland. The results from this model complimented the data collected from the field. Improvements, such as increased amounts of vegetation were recommended for the wetlands with the aim of increasing the effectiveness. Further investigations into the wetlands will allow for better understanding of the wetland's performance.

Determination of Biodegradation Rate on Dichlorvos and Methidathion (Dichlorvos와 methidathion의 생분해율의 측정)

  • Min, Kyung-Jin;Cha, Chun-Geun
    • Journal of Environmental Health Sciences
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    • v.25 no.3
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    • pp.36-43
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    • 1999
  • The present study was performed to investigate biodegradation rate of dichlorvos and methidathion. In the biodegradation test of two pesticides by the modified river die-away method from June 17 to August 22, 1998, the biodegradation rate constants and half-life were determined in Nakdong(A) and Kumho River(B). Biodegradation rate of dichlorvos was 4.51% in A sampling point, 6.88% in B sampling point after 7 days. Biodegradation rate constants and half-life of dichlorvos were 0.0066 and 105 days in A sampling point, 0.0102 and 67.9 days in B sampling point, respectively. Biodegradation rate of methidathion was 23% in A sampling point, 36% in B sampling point after 7 days. Biodegradation rate constants and half-life of methidathion were 0.0377 and 18.4 days in A sampling point, 0.0641 and 10.8 days in B sampling point, respectively. Biodegradation rate of methidathion was faster than that of dichlorvos. This suggested that the difference in biodegradation of pesticides was due to difference in the water quality and standard plate counts in the Nackdong and Kumho Rivers. The result of correlation analysis between biodegradation rate constants of the pesticides and water quality(DO, BOD, SS, ABS, NH$_3$-N, and NO$_3$-N) showed significant correlation with BOD, SS and NH$_3$-N at the 5% significant level. A significant linear equation was obtained from regression analysis at the 5% significant level, whereas, dependent variables were BOD, SS and NH$_3$-N, and the biodegradation rate constant was independent variable. It is suggested that dichlorvos will be mainly degraded by hydrolysis, and for methidathion was both hydrolysis and biodegradation. A significant QSAR equation was obtained from regression analysis at the 10% significant level, whereas, dependent variable is biodegradation rate constants of BPMC, chlorothalonil, dichlorvos and methidathion, vapor pressures, partition coefficients and water solubilities of the pesticides are independent variables. Also, a significant linear equation was obtained from regression analysis at the 1% significant level, whereas, dependent variable is biodegradation rate constants of BPMC, chlorothalonil, dichlorvos and methidathion, hydrolysis rate constants of the pesticides are independent variables. It is suggested that the pesticides will be degraded by main degradation factor when the pesticides was affected both hydrolysis and biodegradation.

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Studies on the Heavy Metal Contamination in the Sediment of the Han River (한강으로 유입된 저질중의 중금속오염도 조사)

  • 신정식;박상현
    • Journal of environmental and Sanitary engineering
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    • v.6 no.1
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    • pp.83-93
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    • 1991
  • For the survey of water pollution, several heavy metals were analyzed in the sediment of the Han River from March 20 to April 22, 1989. The results were as follows : 1. The respective ranges of heavy metal concentrations of Cadimium, Lead, Copper, Zinc and Manganese found in the sediments of the Han River were 0.32!2.41 $\mu g/g$, 15.80~129.64 $\mu g/g$, 13.82~372.36 $\mu g/g$, 58.40~925.40 $\mu g/g$, 271.50~668.30 $\mu g/g$. 2. In the sediment of inflow site Jung Rang Chon the contents of Lead, Copper, Zinc were the highest among other sampling points and An Yang Chon, the contents of Cadmium, was the highest among other sampling points and Wang Sook Chon, the contents of Manganese, was the highest among other sampling points. 3. Through all sampling points general trend of heavy metal contamination showed the highest in Zinc, the next Manganese, Copper, Lead and Cadmium respectively. 4. The higher amount of heavy metal was found in the finer particles of sediment. 5. The amount of Cadmium and Lead of the Han River water was below the standard of environment.

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Impact of urbanization on Nwaorie and Otamiri Rivers in Owerri, Imo State, Nigeria

  • Ogbomida, Emmanuel T.;Emeribe, Chukwudi N.
    • Advances in environmental research
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    • v.2 no.2
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    • pp.119-129
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    • 2013
  • The study examined the effect of urbanization on the water quality of Nwaorie and Otamiri Rivers in Owerri metropolis, Imo State, South-East Nigeria. Water samples were collected from Nwaorie and Otamiri Rivers from four sampling stations up and down stream. Water parameters analyzed using standard procedures were: color, turbidity, temperature, pH, total hardness, total solids, metals (Iron and magnesium), anions (nitrate and ammonia) and Fecal coliform. Results showed increased levels of coloration, iron, ammonia, turbidity and fecal coliform which exceeded the World Health Organization (WHO) permissible limits for drinking water. Increase in these parameters indicated influx of industrial effluent from the nearby industries and indiscriminate disposal of wastes at the bank of the rivers. Application of ANOVA showed various degree of variation in pollutants levels between the two rivers and at different sampling points. River Nwaorie was observed to be more impacted than River Otamiri. High values of iron observed from the study could be deleterious to human health if the river water is consumed without treatment. The study, therefore, recommended proper waste management and disposal as well as effluent treatments in Owerri municipal against pollution of surface water.