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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 15, Issue 4 - Nov 2013
Volume 15, Issue 3 - Aug 2013
Volume 15, Issue 2 - May 2013
Volume 15, Issue 1 - Feb 2013
Selecting the target year
Effects of Floating and Submerged Plants on Important Water Environments of Wetland
Lee, Geun-Joo ; Sung, Kijune ;
Journal of Wetlands Research, volume 15, issue 3, 2013, Pages 289~300
DOI : 10.17663/JWR.2013.15.3.289
In this study, two types of wetland plants, Eichhornia crassipes (a floating plant) and Ceratophyllum demersum (a submerged plant) were introduced to wetland mesocosms to understand how the water properties of wetlands such as pH, dissolved oxygen content, water temperature, oxidation reduction potential, and nutrient concentrations are affected by different types of wetland plant. The floating plant lives on the water surface and can block light penetration; it exhibited the lowest water temperature and temperature difference between lower and upper layers. After the addition of contaminants, the dissolved oxygen (DO) concentration decreased abruptly but recovered continuously in all mesocosms; especially the submerged plants, which photosynthesize in water, showed the largest increases in DO and diel periodicity DO, as well as in pH value. The oxidation-reduction potential in both water and sediment were affected by the presence of wetland plants and plant type and the results suggest that various aspects of wetland biogeochemistry are affected by the presence and type of wetland plants. The total nitrogen and phosphorous concentrations in water decreased in the following order: Water only < Water + Soil < Floating Plants < Submerged Plants. Although both floating and submerged plants can control algal concentrations, the effect was more prominent for floating plants.
A Comparative Study on the Preference and Visual Characteristics of Stream Landscape According to Hydromorpological Structures
Choi, Yun Eui ; Lee, Jung A ; Chon, Jinhyung ;
Journal of Wetlands Research, volume 15, issue 3, 2013, Pages 301~315
DOI : 10.17663/JWR.2013.15.3.301
The purpose of this study is to investigate characteristics of hydromorpological structures that affect landscape preference and visual characteristics on the sections of the designated streams where have dynamic ecological characteristics. We evaluated the ecological status of the streams utilizing LAWA to assess hydromorpological structures of streams. We also investigated preference and visual characteristics of stream landscapes through Semantic Differential Scale(SD scale). The differences of visual images according to the characteristics of hydromorpological structures in the sites were analyzed by descriptive statistics, One-way ANOVA, and t-test. As a result, this study showed that sections represented as "good" ecological status are shown to be harmonious, beautiful, natural, and clean comparing to sections represented as "poor" ecological status. The hydromorpological structures that have significant impacts on the visual characteristics are considered as riparian vegetation, cross-sectional shape, and the artificial structures. Results of this study can help guide the stream restoration of the damaged stream to improving ecological function and positive landscape.
An Ecological Restoration of Urban Streams by Supplying Maintenance Water
Cho, Hong Je ; Lee, Su Ji ;
Journal of Wetlands Research, volume 15, issue 3, 2013, Pages 317~328
DOI : 10.17663/JWR.2013.15.3.317
The aim of this study is to compare the effects of the maintenance water supply methods on the ecological restoration of 5 urban streams such as Mugeo cheon, Yaksa cheon, Yeocheon cheon, Myeongjeong cheon and Cheokgwa cheon in Ulsan metropolitan city. Water quality of the streams have been innovatively improved and the ecosystems have gradually been restored by supplying maintenance water constantly. However, we found that if the maintenance water was in a state of higher salinity or low quality, even enough supply was not helpful and even harmful for ecological restoration. We confirmed that the most important things to create or maintain from the urban stream to the ecological stream are that facilities like a walkway construction should be installed at least, supplying appropriate maintenance water, and a connection with the main stream.
Evaluation of Temporal and Spatial Variations of Water Quality at the Streams Flowing into the Suncheon Bay
Park, Sang-Jin ; Cheong, Cheong-Jo ;
Journal of Wetlands Research, volume 15, issue 3, 2013, Pages 329~337
DOI : 10.17663/JWR.2013.15.3.329
This study was performed to evaluate the temporal and spatial variations of the water quality at stream flowing into the Suncheon bay in Suncheon city from October 2008 to August 2009 and to estimate the pollutant sources from the streams using multivariate analysis. Water qualities from Seo stream, Dong stream, Ok stream were evaluated as I grade(very good) that compared to the Water Quality Standard. But Haeryong stream and inlet site of Suncheon Bay in BOD were evaluated as a little bad and fair. Water quality at the stream flowing into the Suncheon Bay was could be explained up to 92.8% by three factors which were included in loading of nutrients, organic matter and total coliform group by the allochthonous matters(53.7%), Topographic Factors(25.0%), seasonal variation(14.2%). The concentrations of total nitrogen and phosphorus at sewage treatment plant and organic matters at Haeryong stream were higher than that of others, respectively. From principal component analysis and factor analysis, it could be suggested that it is very important to make an effort to reduce the nutrients and organic matters from sewage treatment plant and Haeryong stream to be in good conservation of the Suncheon bay.
Fitness Evaluation of CMORPH Satellite-derived Precipitation Data in KOREA
Kim, Joo Hun ; Kim, Kyung Tak ; Choi, Youn Seok ;
Journal of Wetlands Research, volume 15, issue 3, 2013, Pages 339~346
DOI : 10.17663/JWR.2013.15.3.339
This study analyzes the application possibilities of the satellite-derived precipitation to water resources field. Precipitation observed by ground gauges and climate prediction center morphing method (CMORPH) which is global scale precipitation estimated by National Oceanic and Atmospheric Administration Climate Prediction Center (NOAA CPC) using satellite images are compared to evaluate the quality of precipitation estimated from satellite images. Precipitation data from 10-years (2002 to 2011) is applied. The correlation coefficient of 1-day cumulative precipitation is 0.87, but the 1-year precipitation is 4 to 5 times different. The variability of root mean square error (RMSE) become smaller as temporal resolution lower. On the results for the watershed scale, the precipitation from gauges and CMORPH shows better agreement as the watershed become larger.
Primary Production and Litter Decomposition of Macrophytes in the Sihwa Constructed Wetlands
Choi, Kwangsoon ; Kim, Ho Joon ; Kim, Dong Sub ; Cho, Kang Hyun ;
Journal of Wetlands Research, volume 15, issue 3, 2013, Pages 347~356
DOI : 10.17663/JWR.2013.15.3.347
To provide the information for the wetland management considering the water treatment ability of macrophytes, the growth characteristics and primary production by reed (Phragmites australis) and cattail (Typha angustifolia), and the decomposition rate of organic matter produced were investigated in two sub-wetlands (Banweol and Donhwa wetlands) of the Sihwa Constructed Wetland (CW) with different chemistry of inflows. The shoot height of P. australis and Typha angustifolia began to increase in March, and reached its peaks in July and August (340cm and 320cm, respectively). The shoot density of P. australis ranging
was higher than that of T. angustifolia (max.
). Standing biomass of P. australis ranged from
, with maximal biomass in Banwol Upper Wetland. And it was larger in upper wetlands than lower wetlands. On the other hand standing biomass of T. angustifolia (
) was similar to that of P. australis in Banwol Upper Wetland. Primary productivity of P. australis was in the order of Banwol Upper Wetland (
) > Donghwa Lower Wetland (
) > Banwol Lowerr Wetland (
Donghwa Lower Wetland (
), and that of T. angustifolia (
) was higher than P. australis. Annual production of organic matter produced by P. australis and T. angustifolia was 845 ton DM/yr (423 ton C/yr), and about 90% was comprised of that by P. australis. From the litter decomposition rate (k) (P. australis: leaf 0.0062/day, stem 0.0018/day; T. angustifolia: leaf 0.0031/day, stem 0.0018/day), leaf was rapid degraded compare to stem in both P. australis and T. angustifolia. The litter decomposition rate of leaf was two times rapid P. australis than T. angustifolia, whereas that of stem was same in both. Annual litter decomposition amount of P. australis than T. angustifolia was 285 ton C/yr(67.3% of organic matter produced by macrophytes), indicating that 32.7% of organic matter produced by macrophytes is accumulated in the Sihwa CW.
A Study on Preference Heterogeneity of Economic Valuation for the Washland of Upo Wetland - Development of Waterfront Resources -
Yoo, Byong Kook ; Kim, Hung Soo ; Ju, Dug ;
Journal of Wetlands Research, volume 15, issue 3, 2013, Pages 357~366
DOI : 10.17663/JWR.2013.15.3.357
This study investigates to explain preference heterogeneity of respondents for economic valuation in washland of Upo wetland using Mixed Logit Model and Latent Class Model. Mixed Logit Model showed respondent heterogeneity in the attributes of wetland area and funds as well as some alternatives violated IIA assumption. 2-class Latent Class Model for respondents were used to explain the sources of the heterogeneity. Class 1 respondents who are located relatively close to Upo wetland had more experience and knowledge of Upo wetland and better understood the information suggested in the questionnaire than class 2 respondents in mostly metropolitan area of Seoul, Incheon.
Evaluation of Basin-Specific Water Use through Development of Water Use Assessment Index
Baeck, Seung Hyub ; Choi, Si Jung ;
Journal of Wetlands Research, volume 15, issue 3, 2013, Pages 367~380
DOI : 10.17663/JWR.2013.15.3.367
In this study, sub-indicators, and thematic mid-indexes to evaluate the water use characteristics were selected through historical data analysis and factor analysis, and consisted of the subject approach framework. And the integrated index was developed to evaluate water use characteristics of the watershed. Using developed index, the water use characteristics were assessed for 812 standard basins with the exception for North Korea using data of 1990 to 2007 from the relevant agencies. A sensitivity analysis is conducted for this study to determine the proper way through various normalization and weighting methods. To increase the objectivity of developed index, the history of the damage indicators are excluded in the analysis. In addition, in order to ensure its reliability, results from index with and without consideration of the damage history were compared. Also, the index is also applied to real data for 2008 Gangwon region to verify its field applicability. Through the validation process this index confirmed the adequacy for the indicators selection and calculation method. The results of this study were analyzed based on the spatial and time vulnerability of the basin's water use, which can be applied to various parts such as priority decision-making for water business or policy, mitigations for the vulnerable components of the basin, and supporting measures to establishment by providing relevant information about it.
Ecologcal Response of the endangered aquatic plant, Viola raddeana Regal, to Effect of Increased CO
Concentration and Air Temperature
Jang, Rae Ha ; Lee, Seung Hyuk ; Han, Young Sub ; Cho, Kyu Tae ; You, Young Han ;
Journal of Wetlands Research, volume 15, issue 3, 2013, Pages 381~386
DOI : 10.17663/JWR.2013.15.3.381
concentration and temperature affect ecological responses of plants. In order to know the effects of global warming on the Viola raddeana Regal, endangered aquatic plant designated by the Ministry of Environment Korea, this study was investigated at control and treatment(increased
concentration + increased temperature) in glasshouse. Then, autecological responses of V. raddeana were monitored and measured. As a result, shoot length, number of fruits per plant, number of branch per plant, number of seeds per fruit, number of fruits per branch, and weight of 10 seeds were higher in control than in treatment. number of leaves per branch was higher in treatment than in control. Length of axis, length of branch and number of leaves per plant were not different between in the control and in the treatment. These results demonstrated that the reproductive response of V. raddeana might be negatively influenced by increased
concentration and temperature. The global warming will be one of the main causes of extinction for V. raddeana Regal.
Effects of Grassed Swale Lengths on Reduction Efficiencies of Non-point Source Pollutants
Paek, Seoungbong ; Gil, Kyungik ;
Journal of Wetlands Research, volume 15, issue 3, 2013, Pages 387~396
DOI : 10.17663/JWR.2013.15.3.387
Non-point pollution source is difficult to control due to uncertain outflow path and emission. So, There are many development and research to Best Management Practices(BMP) established to manage the Non-point pollution source. Besides, various methods of estimated efficiency to exact assessment of BMP is presented. In this study, the impact about length of Grassed Swale on reduction efficiency based on monitoring results of Grassed Swale by length is studied. By estimating Grassed Swale reduction efficiency in a variety of methods, the difference between the methods of estimated efficiency was compared with those that. Estimated efficiency method using ER, SOL, ROL, ROF, SOLF, and ROLF methods is analyzed. EMC analysis result is high inflow and outflow concentration distinction organic compound for nutritive salts The result of efficiency analysis along Grassed Swale length sharply increases in a Grassed Swale inlet. After this increase, the efficiency gradually decreases. This is expected that cistern installed in the end of the front. To obtain a stable reduction efficiency of Grassed Swale, minimum length 30m of Grassed Swale should be enough. Also, in order to efficiently and economically design Grassed Swale, the researches on length of Grassed Swale are needed rather than simple analysis of efficiency.
Development for Wetland Network Model in Nakdong Basin using a Graph Theory
Rho, Paikho ;
Journal of Wetlands Research, volume 15, issue 3, 2013, Pages 397~406
DOI : 10.17663/JWR.2013.15.3.397
Wetland conservation plan has been established to protect ecologically important wetlands based on vegetation integrity, spatial distribution of endangered species, but recently more demands are concentrated on the landscape ecological approaches such as topological relationship, neighboring area, spatial arrangements between wetlands at the broad scale. Landscape ecological analysis and graph theory are conducted to identify spatial characteristics related to core nodes and weak links of wetland networks in Nakdong basin. Regular planar model, which is selected for wetland networks, is applied in the Nakdong basin. The analysis indicates that 5 regional groups and 4 core wetlands are extracted with 15km threshold distance. The IIC and PC values based on the binary and probability models suggest that the wetland group C composed of main stream of Nakdong river and Geumho river is the most important area for wetland network. Wetland conservation plan, restoration projected of damaged and weak links between wetlands should be proposed through evaluating the node, links, and networks from wetlands at the local to the regional scale in Nakdong basin.
Development of tree box filter LID system for treating road runoff
Choi, Jiyeon ; Son, Younggyu ; Lee, Soyoung ; Lee, Yuhwa ; Kim, Lee Hyung ;
Journal of Wetlands Research, volume 15, issue 3, 2013, Pages 407~412
DOI : 10.17663/JWR.2013.15.3.407
The aim of this study was to develop a tree box filter system, an example of Low Impact Development technology, for treating stormwater runoff from road. Monitoring of storm events was performed between June 2011 and November 2012 to evaluate the system performance during wet day. Based on the results, all runoff volume generated by rainfall less than 2 mm was stored in the system. The minimum volume reduction of 20% was observed in the system for rainfall greater than 20 mm. The greatest removal efficiency was exhibited by the system for total heavy metals ranging from 70 to 73% while satisfactory removal efficiency was exhibited by the system for particulate matters, organic matters and nutrients ranging from 60 to 68%. The system showed greater pollutant removal efficiency of 67 to 83% for rainfall less than 10 mm compared to rainfall greater than 10 mm which has 39 to 75% pollutant removal efficiency. The system exhibited less pollutant reduction for rainfall greater than 10 mm due to the decreased retention capacity of the system for increased rainfall. Overall, the system has proved to be an option for stormwater management that can be recommended for on-site application. Similar system may be designed based on several factors such as rainfall depth, facility size and pollutant removal efficiency.
Runoff Simulation of An Urban Drainage System Using Radar Rainfall Data
Kang, Na Rae ; Noh, Hui Seung ; Lee, Jong So ; Lim, Sang Hun ; Kim, Hung Soo ;
Journal of Wetlands Research, volume 15, issue 3, 2013, Pages 413~422
DOI : 10.17663/JWR.2013.15.3.413
In recent, the rainfall is showing different properties in space and time but the ground rain gauge only can observe rainfall at a point. This means the ground rain gauge has the limitations in spatial and temporal resolutions to measure rainfall and so there is a need to utilize radar rainfall which can consider spatial distribution of rainfall This study tried to apply radar rainfall for runoff simulation on an urban drainage system. The study area is Guro-gu, Seoul and we divided study area into subbasins based on rain gauge network of AWS(Automatic Weather station). Then the radar rainfalls were adjusted using rainfall data of rain gauge stations the areal rainfalls were obtained. The runoffs were simulated by using XP-SWMM model in subbasins of an urban drainage system. As the results, the adjusted radar rainfalls were underestimated in the range of 60 to 95% of rain gauge rainfalls and so the simulated runoffs from the adjusted radar and gauge rainfalls also showed the differences. The runoff peak time from radar rainfall was occurred more fast than that from gauge rainfall.
A Practical Algorithm to Simulate Erosion of On-Shore Zone
Kim, Hyoseob ; Lee, Jungsu ; Jin, Jae-Youll ; Jang, Changhwan ;
Journal of Wetlands Research, volume 15, issue 3, 2013, Pages 423~430
DOI : 10.17663/JWR.2013.15.3.423
An algorithm to allow shoreline movement during numerical experiment on sediment transport, deposition or resuspension for general coastal morphology is proposed here. The bed slope near shoreline, i.e. mean sea level, is influenced by bed material, tidal current, waves, and wave-induced current, but has been reported to remain within a stable range. Its annual variation is not large, either. The algorithm is adjusting the bathymetry, if the largest bed slope within shoreline band exceeds a given bed slope due to continuous erosion at zones below the shoreline. This algorithm automatically describes retreat of shoreline caused by erosion, when used within a numerical system. The algorithm was tested to a situation which includes a continuous dredging at a point, and showed satisfactory development of concentric circle contours. Next, the algorithm was tested to another situation which includes sinking of eroded part of bed plate, and produced satisfactory results, too. Finally, the algorithm was tested to a movable-bed laboratory experimental conditions. The shoreline movement behind detached breakwater was reasonably reproduced with this algorithm.