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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Wetlands Research
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Journal DOI :
Korean Wetlands Society
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Volume & Issues
Volume 17, Issue 4 - Nov 2015
Volume 17, Issue 3 - Aug 2015
Volume 17, Issue 2 - May 2015
Volume 17, Issue 1 - Feb 2015
Selecting the target year
Hydrologic and Environmental Assessment of an Infiltration Planter for Roof Runoff Use
Moon, So-Yeon ; Choi, Ji-Yeon ; Hong, Jung-Sun ; Yu, Gi-Gyung ; Jeon, Je-Chan ; Flores, Precious Eureka D. ; Kim, Lee-Hyung ;
Journal of Wetlands Research, volume 17, issue 4, 2015, Pages 325~331
DOI : 10.17663/JWR.2015.17.4.325
Due to urbanization and increase in impervious area, changes in natural water circulation system have become a cause of groundwater recharge reduction, streamflow depletion and other hydrological problems. Therefore, this study developed the infiltration planter techniques applied in an LID facility treating roof stormwater runoff such as, performance of small decentralized retention and infiltration through the reproduction of natural water circulation system and use of landscape for cleaning water. Assessment of an infiltration planter was performed through rainfall monitoring to analyze the water balance and pollutant removal efficiency. Hydrologic assessment of an infiltration planter, showed a delay in time of effluent for roof runoff for about 3 hours and on average, 79% of facilities had a runoff reduction through retention and infiltration. Based on the analysis, pollutant removal efficiency generated in the catchment area showed an average of 97% for the particulate matter, 94% for the organic matter and 86-96% and 92-93% for the nutrients and heavy metals were treated, respectively. Comparative results with other LID facilities were made. For this study, facilities compared the SA/CA to high pollutant removal efficiency for the determination to of the effectiveness of the facility when applied in an urban area.
Valuation of Ecosystem Services through Organic Carbon Distribution and Cycling in the Pinus densiflora Forest in Mt. Worak National Park
Won, Ho-Yeon ; Lee, Young-Sang ; Mun, Hyeong-Tae ;
Journal of Wetlands Research, volume 17, issue 4, 2015, Pages 332~338
DOI : 10.17663/JWR.2015.17.4.332
Valuation of ecosystem services through organic carbon distribution and cycling in the Pinus densiflora forest at Mt. Worak National Park were investigated from January 2013 through December 2013. The amount of carbon allocated to above and below ground biomass was 32.17 and 8.04 ton C
. Amount of organic carbon in litter layer was 5.55 ton C
. Amount of organic carbon within 50cm soil depth was 58.62 ton C
. Total amount of organic carbon in this Pinus densiflora forest was estimated to 104.38 ton C
. The estimated amount of won in this Pinus densiflora forest in terms of total organic carbon was about 10.44 million won
. The amount of carbon evolved through soil respiration was 4.44 ton C
. The amount of carbon evolved through microbial respiration and root respiration was 2.18 and 2.27 ton C
, respectively. The amount of organic carbon absorbed from the atmosphere of this Pinus densiflora forest was 0.44 ton C
when estimated from the difference between net primary production and microbial respiration. This amount will come to about 44,000 won
in Korean currency.
Difference in Shoreline Flora According to the Usage of Reservoirs in Korea
Cho, Hyunsuk ; Cho, Kang-Hyun ;
Journal of Wetlands Research, volume 17, issue 4, 2015, Pages 339~347
DOI : 10.17663/JWR.2015.17.4.339
Differences in characteristics of flora and environmental factors of geomorphology, hydrology, water quality and soil were investigated in the shoreline of total 35 reservoirs according to their usages of waterpower generation, agricultural water supply, residential and industrial water supply and flood control in Korea. The number of plant species, floral structure and characteristics of species traits in the shoreline of reservoirs were different according to their usage. From the results of stepwise regression analysis, the total number of vascular plant species was increased at the environment of the higher flood frequency at the median water level and the longer exposure duration of the shoreline. The results of principal coordinates analysis and cluster analysis showed that the shoreline flora was classified as the 3 types of 1) flood control and residential and industrial water supply, 2) agricultural water supply and 3) waterpower generation reservoirs. The water level fluctuation, flood frequency at the median water level, lake water quality index and exposure duration of the shoreline were selected as important environmental factors affected on the characteristics of shoreline flora. The species richness of total flora and hydrophytes, especially submerged macrophytes, were much higher in the reservoirs for the purpose of the waterpower generation in which mesotrophic water quality and stable water levels were maintained. Annual or biennial ruderals were established on the ephemeral drawdown zone of flood control, residential and industrial water supply reservoirs which have oligotrophic or mesotrophic water quality and wide range of water level fluctuation. The floating hydrophytes were differentially dominated in the littoral zones of the agricultural water supply reservoirs with a mesotrophic or eutrophic water quality and a medium water level fluctuation. In conclusion environmental factors related to water level fluctuation and water quality were different and then the floral characteristics of shoreline were distinguishable according to usage of Korean reservoirs.
Water Quality Analysis of Hongcheon River Basin Under Climate Change
Kim, Duckhwan ; Hong, Seung Jin ; Kim, Jungwook ; Han, Daegun ; Hong, Ilpyo ; Kim, Hung Soo ;
Journal of Wetlands Research, volume 17, issue 4, 2015, Pages 348~358
DOI : 10.17663/JWR.2015.17.4.348
Impacts of climate change are being observed in the globe as well as the Korean peninsula. In the past 100 years, the average temperature of the earth rose about 0.75 degree in celsius, while that of Korean peninsula rose about 1.5 degree in celsius. The fifth Assessment Report of IPCC(Intergovermental Panel on Climate Change) predicts that the water pollution will be aggravated by change of hydrologic extremes such as floods and droughts and increase of water temperature (KMA and MOLIT, 2009). In this study, future runoff was calculated by applying climate change scenario to analyze the future water quality for each targe period (Obs : 2001 ~ 2010, Target I : 2011 ~ 2040, Target II : 2041 ~ 2070, Target III : 2071 ~ 2100) in Hongcheon river basin, Korea. In addition, The future water quality was analyzed by using multiple linear regression analysis and artificial neural networks after flow-duration curve analysis. As the results of future water quality prediction in Hongcheon river basin, we have known that BOD, COD and SS will be increased at the end of 21 century. Therefore, we need consider long-term water and water quality management planning and monitoring for the improvement of water quality in the future. For the prediction of more reliable future water quality, we may need consider various social factors with climate components.
The Analysis of Vegetation Characteristics According to Revetment Structure at Rural Small Streams
Kim, Mi-Heui ; Kang, Banghun ; Kong, Min-Jae ; Jeong, Myeong-Cheol ; Son, Jin-Kwan ;
Journal of Wetlands Research, volume 17, issue 4, 2015, Pages 359~369
DOI : 10.17663/JWR.2015.17.4.359
Stream ecosystems are highly valued natural resources, however, stream environments are currently under threat in several respects. We evaluated vegetation and ecological characteristics according to different revetment types. The distribution of vegetation differed with revetment type, with a 42~45 taxa found in natural revetments, and 23~38 taxa in vertical revetments. Thus, natural revetments host more diverse vegetation than vertical revetments. We also found more plants belonging to the families Labiatae and Cyperaceae growing in natural revetments than in vertical revetments. We proposed that habitat space be apportioned to introduce annual plants as part of stream restoration projects. And, we identified 7 families and 18 taxa of naturalized plants, majority taxa were either biennial or perennial. Moreover, naturalized ratio was higher in vertical(14.3%) than natural(12.1%), we proposed a plan to promote and improve natural streams and revetments. Furthermore, we applied a waterfront evaluation method developed by the Natural Resources Conservation Service of the USDA-NRCS, which confirmed that stream health can be improved in most regions by controlling naturalized plants and ensuring shrub and tree growth. We adopted a new method to remove naturalized plants and establish natural revetments to ensure shrub and tree growth to aid in small-stream restoration and improvement. In future studies, we hope to develop methods for small-stream restoration projects in rural areas.
Applicability of Spatial Interpolation Methods for the Estimation of Rainfall Field
Jang, Hongsuk ; Kang, Narae ; Noh, Huiseong ; Lee, Dong Ryul ; Choi, Changhyun ; Kim, Hung Soo ;
Journal of Wetlands Research, volume 17, issue 4, 2015, Pages 370~379
DOI : 10.17663/JWR.2015.17.4.370
In recent, the natural disaster like localized heavy rainfall due to the climate change is increasing. Therefore, it is important issue that the precise observation of rainfall and accurate spatial distribution of the rainfall for fast recovery of damaged region. Thus, researches on the use of the radar rainfall data have been performed. But there is a limitation in the estimation of spatial distribution of rainfall using rain gauge. Accordingly, this study uses the Kriging method which is a spatial interpolation method, to measure the rainfall field in Namgang river dam basin. The purpose of this study is to apply KED(Kriging with External Drift) with OK(Ordinary Kriging) and CK(Co-Kriging), generally used in Korea, to estimate rainfall field and compare each method for evaluate the applicability of each method. As a result of the quantitative assessment, the OK method using the raingauge only has 0.978 of correlation coefficient, 0.915 of slope best-fit line, and 0.957 of
and shows an excellent result that MAE, RMSE, MSSE, and MRE are the closest to zero. Then KED and CK are in order of their good results. But the quantitative assessment alone has limitations in the evaluation of the methods for the precise estimation of the spatial distribution of rainfall. Thus, it is considered that there is a need to application of more sophisticated methods which can quantify the spatial distribution and this can be used to compare the similarity of rainfall field.
Flow Rate·Water Quality Characteristics of Tributaries and a Grouping Method for Tributary Management in Nakdong River
Na, Seungmin ; Lim, Tae Hyen ; Lee, Jae Yun ; Kwon, Heongak ; Cheon, Se Uk ;
Journal of Wetlands Research, volume 17, issue 4, 2015, Pages 380~390
DOI : 10.17663/JWR.2015.17.4.380
In this study, the major 38 tributaries in Nakdong River were monitored for flow rate and water quality in order to understand the characteristics of the watershed and to find improvement plan. The flow rate and water quality for each target tributary were evaluated based on the monitoring data in 2013~2014 using a statistical package SPSS-22.0. In addition, the tributary grouping method was conducted using a
concentration/flowrate and TP concentration/flowrate monitoring data. The average values of
, TP and TOC concentrations in Gumicheon, Gyeonghocheon, Jincheoncheon, Gisegokcheon, Yonghacheon and Yonghocheon located at Nakdong Waegwan and Nakdong Goryung watershed were high and in the grade of III or IV (5~8 mg/L). The Pearson correlation coefficients of TOC with
, and TP were greater (r
Analysis on the Characteristics of Nonpoint sources during the Precipitation in Residential Area
Kwon, Heongak ; Im, Toehyo ; Na, Seungmin ; Lee, Chunsik ; Cheon, Seuk ;
Journal of Wetlands Research, volume 17, issue 4, 2015, Pages 391~401
DOI : 10.17663/JWR.2015.17.4.391
In this study, divided into small category groups for the residential area it was carried out monitoring for the runoff during precipitation. Based on the results analyzed according to the nonpoint sources Housing leakage characteristics. Analysis of the rainfall runoff and concentration of each type of exclusive detached house with apartments, in the majority of precipitation types runoff concentrations were higher in early. In the case of a difference of two points per runoff rate rainfall it was largely investigation. The average runoff is estimated loadings of BOD
detached house case, if the apartment was estimated at point BOD
. The average EMCs is BOD BOD 6.6 mg/L, SS 12.8 mg/L, T-N 1.518 mg/L, T-P 0.099 mg/L detached house case, if the apartment was estimated at point BOD 6.3 mg/L, COD 11.2mg/L, SS 14.5 mg/L, T-N 3.1 mg/L, T-P 0.2 mg/L. The initial 30 percentage calculated based on the initial results, the total flow of 30% if the outflow of detached house showed a net percentage difference to T-P 1.04 > T-N 0.97 > BOD 0.90 > SS 0.80. The apartment area showed the percentage difference in the water quality in the order of BOD 1.49 > T-P 1.40 > SS 1.30 > T-N 0.96 per item.
Use of stream environment by river otters in Hongcheon river, Gangwon Province, Korea
Lee, Sangdon ;
Journal of Wetlands Research, volume 17, issue 4, 2015, Pages 402~406
DOI : 10.17663/JWR.2015.17.4.402
This study aims at favorable environmental conditions by river otter residing in Hongcheon river ecosystems using spraints along the river. Otter spraints were indicative of habitat use pattern and marking a territory in the areas. Nae-chon and Kuneob-chon river otter spraints were collected totaling 478 with 8 times during 2009-2011, and based on the number river use patterns were analyzed with the technique of index of dispersion. Results with larger than one indicated that river otter habitat use pattern were not random; instead they used preferred areas for habitat use. `I` values greater than one indicate a clumped distribution and lower than one indicate random distribution. This study also demonstrated that we need a sophiscated linear model that should be developed to identify key habitat elements in river ecosystems.
Effects of Gold Nanoparticles on eggs and tadpoles of Rana dybowskii
Kim, Eun Ji ; Ko, Weon Bae ; Han, Eul ; Kim, Ho Jin ; Ko, Jeong Won ; Chung, Hoon ;
Journal of Wetlands Research, volume 17, issue 4, 2015, Pages 407~413
DOI : 10.17663/JWR.2015.17.4.407
As the number of applications containing nanomaterials increase, aquatic ecosystem exposure to nanoparticles (NPs) is unavoidable. In this study, we carried out toxicity assessment to Au-nanoparticles(NPs) of Rana dybowskii eggs and tadpoles. Toxicity was recorded hatching rate, body condition(Snout-tail length, STL), and behavioral sensitivity. Behavioral sensitivity was analyzed to anti-predator behavior using Ethovision XT 9. Au-NPs did not show any toxicity of hatching rate and STL. But, Tadpoles exposed to Au-NPs decrease behavioral sensitivity of stimuli. This study has value of environmental toxicity evaluation because these results show the new way of toxicity assessment.
Analysis of laboratory scale nitriation reactor using sludge thickener supernatant
Im, Jiyeol ; Gil, Kyungik ;
Journal of Wetlands Research, volume 17, issue 4, 2015, Pages 414~420
DOI : 10.17663/JWR.2015.17.4.414
Nitrogen is one of main causes to induce eutrophication of water system and one of contaminants that must be treated for protection of water system. In this study, it was intended to identify a method to increase operation efficiency of municipal wastewater treatment plant (MWTP) by treating high concentration nitrogen. A laboratory scale reactor was operated by using sludge thickener supernatant in the MWTP. During operation of the laboratory scale reactor, it was intended to induce stable nitritation and analyze effects of related operation factors. As results, it was shown that the nitiritation could be induced artificially through control of retention time and sections where the stable nitiritation was induced were identified also. In particular, highly efficient nitrite conversion efficiency near 90% was identified in condition of 1 day retention time. Especially, it was shown that ammonium nitrogen load affected ammonium nitrogen removal efficiency and nitrite conversion efficiency. In the condition of high ammonium nitrogen load, the nitrite conversion efficiency and the ammonium nitrogen removal efficiency decreased. On the contrary in the condition of low ammonium nitrogen load, it was found that the nitrite conversion efficiency decreased. It means that control of ammonium nitrogen concentration and its retention time is needed for the nitritation. It is considered that for the sewage containing high load nitrogen in sludge treatment process as like the sludge thickener supernatant, the nitritation can be applied, which can be suggested as a modification method of MWTP.
Analysis of COD fraction and change of COD in nitritation reactor using various wastewater
Im, Jiyeol ; Gil, Kyungik ;
Journal of Wetlands Research, volume 17, issue 4, 2015, Pages 421~427
DOI : 10.17663/JWR.2015.17.4.421
In ASM model, organic matters are classified according to their characteristics and general classification into COD and BOD cannot satisfy conditions required by ASM. In this study, it was performed to study classification of organic matters required by ASM on the basis of microorganisms` respiration rate subject to wastewater and sludge treatment. As results of analysis of the organic matter`s appearance, it was found that there were some differences in composition of organic matters between wastewaters. It is considered that it is an important characteristic of wastewater that should be understood in treating wastewater in each process. Therefore, it is considered that appearance of organic matters in each wastewater identified by this study will be used as important basic data for operation of municipal wastewater treatment plant. It was identified that SS was an important factor affecting nitrification through organic matter and ammonium nitrogen change analysis according to reaction time in the nitrification. It is considered that the nitrification has close relationship with choice of optimal retention time.
Suggestion of Appropriate Design and Maintenance in a Constructed Wetland using Monitoring Results
Lee, So young ; Choi, Ji yeon ; Kim, Lee-Hyung ;
Journal of Wetlands Research, volume 17, issue 4, 2015, Pages 428~435
DOI : 10.17663/JWR.2015.17.4.428
Constructed wetlands (CWs) have been accepted as an attractive and economic alternative to a variety of pollution control and provided potentially valuable wildlife habitat in urban and suburban areas, as well as esthetic value within the local natural environment. CWs are known eco-friendly technology to solve the problem of the climate change and urbanization issues. Numerous studies have been published on the various aspects of a CW. However, there are current limitations about the CW operations such as few design guidelines, poor performance results regarding the simple construction. Therefore, the objective of this research was to suggest an appropriate design and maintenance guidelines for a CW by thorough investigation of site monitoring results. The research also concentrated in redefining and reclassifying CWs, based on literatures made by the Ministry of Environment (MOE) and other organizations. Investigation at 43 CWs in Korea was performed by using collected data and by performing site survey from 2013 to 2014. Based on the results, the best practices among the investigated CWs provided water treatment, wildlife habitat, environmental education, and leisure. Also these CWs conducted a regular maintenance such as vegetation, sediment dredging and cleaning of facilities. Results obtained are intended for use by academics and any organizations involved in CW management.
Forecasting for the Demand on Water Amenity Zones in the Large Rivers Based on Regional Characteristics and Monthly Variation
Suh, Myong-kyo ; Rhee, Dong Sop ;
Journal of Wetlands Research, volume 17, issue 4, 2015, Pages 436~446
DOI : 10.17663/JWR.2015.17.4.436
It is suggested investigating method about the existing state of demand in this study. The total demand of 357 water amenity zones in 2014 is estimated based on the growth curve models. The effects of population density and distances between water amenity zones and metropolises populated over 1 million are investigated on each river system. The suitability like RMSE and MAPE of logistic and gompertz models are considered to select more suitable model for each water amenity zone. Demand for water amenity zones in 2014 is seemed to be rather high at Han Gang river system and Chungcheongbukdo after analyzing. The influence of population density is rarely effective except Geum Gang river system. The influence of metropolis on the demand for water amenity zones is higher at Geum Gang river system than others.