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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
An Improvement and Applicability of Physical Disturbance Evaluation Technique by Quantification in River System
Choi, Heung-Sik ; Shim, Kyu-Rang ; Lee, Woong-Hee ;
Journal of Wetlands Research, volume 17, issue 3, 2015, Pages 209~220
DOI : 10.17663/JWR.2015.17.3.209
This study has improved the existed physical disturbance evaluation assessment technique in a river and analysed its applicability. The improvements are the quantitative evaluation items instead of qualitative one by providing the background and their evaluation equations, corresponding detailed itemization of evaluation score, and the direct input of hydraulic characteristics and geometrical changes by numerical simulation. In order to confirm the applicability of improved disturbance evaluation technique, the comparison and analysis between the evaluation results of existed and improved techniques have been carried out by applying to the 6 cases of natural, urban, and mountainous streams. Direct input of numerical simulation results of HEC-RAS enables the evaluation simple for 8 evaluation items excluding the items of habitat environment and bottom substrate. The improved disturbance evaluation technique, which evaluates the degree of disturbance sensitively by the quantitative and detailed itemized evaluations, has been confirmed the appropriate applicability by applying to river systems.
Development and Evaluation of Bioretention Treating Stormwater Runoff from a Parking Lot
Yu, Gigyung ; Choi, Jiyeon ; Hong, Jungsun ; Moon, Soyeon ; Kim, Lee Hyung ;
Journal of Wetlands Research, volume 17, issue 3, 2015, Pages 221~227
DOI : 10.17663/JWR.2015.17.3.221
Urbanization increases the impervious cover, which affects the discharge of stormwater runoff and non-point source pollutants to the waterbodies. In order to improve the water quality and restore the aqua-ecosystem, the Ministry of Environment (MOE), Korea MOE introduced the Low Impact Development(LID) techniques on development projects. Therefore, research was performed to develop the bioretention technology for managing the stormwater runoff from urban areas. The test-bed was established on 2013 up to evaluate the performance of pollutant and runoff reduction. A total of 11 storm events have been monitored from November 2013 to present. Even though the SA/CA (surface area of bioretention/catchment area) is approximately 2.2%, the facility shows high pollutant and runoff reduction during storm events by increasing retention and infiltration capacities. The bioretention shows a 100% total runoff reduction at 0mm < R < 10mm rainfall range and more than 90% of runoff reduction at a rainfall range of 10mm < R < 20mm. Due to runoff volume reduction, more than 90% of nonpoint source pollutant were also removed by the bioretention.
Evaluation on the adsorption and desorption capabilities of filter media applied to the nonpoint source pollutant management facilities
Moon, Soyeon ; Hong, Jungsun ; Choi, Jiyeon ; Yu, Gigyung ; Kim, Lee Hyung ;
Journal of Wetlands Research, volume 17, issue 3, 2015, Pages 228~236
DOI : 10.17663/JWR.2015.17.3.228
Urbanization causes many environmental, hydrological and ecological problems such as distortion of the natural water circulation system, increase in nonpoint source pollutants in stormwater runoff, degradation of surface water quality, and damage to the ecosystem. Due to the increase in impervious surface by urbanization, developed countries apply low impact development (LID) techniques as important alternatives to reduce the impacts of urbanization. In Korea, LID techniques were employed since 2012 in order to manage nonpoint source pollutants. LID technology is a technique for removing pollutants using a variety of physical, chemical and biological mechanisms in plants, microorganisms and filter media with the reduced effluence of stormwater runoff by mimicking natural water circulation system. These LID facilities are used in a variety of filter media, but an assessment has not been carried out for the comprehensive comparison evaluation of adsorption and desorption characteristics for the pollutant removal capacity. Therefore, this study was conducted to analyze the adsorption and desorption characteristics of various filter media used in the LID facilities such as sand, gravel, bioceramic, wood chips and bottom ash etc. in reducing heavy metals(Pb, Cu). In this study, the adsorption affinity for Pb in all filter media was higher than Cu. Pseudo second order equation and Langmuir-3 isotherm are more applicable in the adsorption kinetic model and adsorption isotherm model, respectively. As a result of the desorption experiment, the filter media does not exceed KSLT which is the hazardous substance leaching limit, showing the capability of the filter media in LID. The bioceramic and woodchip as filter medias were evaluated and exhibited excellent adsorption capacity for Pb.
Flood Damage Reduction Plan Using HEC-FDA Model
Lee, Jongso ; Kim, Duckhwan ; Kim, Jungwook ; Han, Daegun ; Kim, Hung Soo ;
Journal of Wetlands Research, volume 17, issue 3, 2015, Pages 237~244
DOI : 10.17663/JWR.2015.17.3.237
This study is estimated the flood damage probability of the flood discharge, the flood stage estimation and Economic Analysis for Flood Control about considering of uncertainty. Sum River Basin has chosen and the probability precipitation is estimated by using the concept of critical rainfall duration depending on the frequency of each flood stage estimation point. For calculating the expected annual damage, the functions of long term hazard, discharge-frequency, stage-discharge and depth-damage are established for 8 areas in Sum River Basin. The expected annual damaged is obtained which is based on the sampling informations through more than 500,000 simulation from the functions of considered uncertainty. The result about the optimum frequency and Investment Priorities are estimated by conducting the evaluation about planning the levee of various of Design Frequency. In analysis result, 12% of B/C value has increased if the uncertainty has concerned. Also the optimum frequency or Investment Priorities are possible to be changed. If the political and social analysis perform together it would be helpful to have a reasonable decision other than only the economical analysis as actual Flood damaged reduction planning.
Wetland Conservation Action Plan of Local Government: Gyeongsangnam Province, South Korea
Kim, Ji Yoon ; Do, Yuno ; Lee, Chan-Woo ; Choi, Lee-Ryong ; Joo, Gea-Jae ; Jo, Hyunbin ;
Journal of Wetlands Research, volume 17, issue 3, 2015, Pages 245~250
DOI : 10.17663/JWR.2015.17.3.245
We systematically analyzed the Wetland Conservation Action Plan of Gyeongsangnam Province to evaluate conservation status in local government level. Project topics were categorized into 1) wetland infrastructure, 2) wetland conservation and wise use, 3) education and awareness, and 4) conservation framework. From 2010 to 2013, 42 projects (145 cases, 88,899 million won) were implemented by 14 affiliated organizations under Gyeongsangnam Provincial Government. The number of projects and budget size has been decreased over 4 years, besides most of main projects were continued. The budgets were largely used for wetland project of cities and counties. Development and implementation of various conservation projects may have considerable potential values in wetland conservation, while it is still difficult to assess their overall effectiveness in the society. Diverse wetland management practices in Gyeongsangnam Provincial Government have accumulated fundamental practices and knowledge for an effective local conservation. These administrative experiences will further benefit other local government to establish wetland management framework. To accelerate policy diffusion to other local governments, Gyeongsangnam Province needs to promote and share leading experiences and information of wetland conservation. Enhanced local government framework by the legislation at central government will further support country-level management plans and practices.
Geographical Impact on the Annual Maximum Rainfall in Korean Peninsula and Determination of the Optimal Probability Density Function
Nam, Yoon Su ; Kim, Dongkyun ;
Journal of Wetlands Research, volume 17, issue 3, 2015, Pages 251~263
DOI : 10.17663/JWR.2015.17.3.251
This study suggested a novel approach of estimating the optimal probability density function (OPDF) of the annual maximum rainfall time series (AMRT) combining the L-moment ratio diagram and the geographical information system. This study also reported several interesting geographical characteristics of the AMRT in Korea. To achieve this purpose, this study determined the OPDF of the AMRT with the duration of 1-, 3-, 6-, 12-, and 24-hours using the method of L-moment ratio diagram for each of the 67 rain gages in Korea. Then, a map with the Thiessen polygons of the 67 rain gages colored differently according the different type of the OPDF, was produced to analyze the spatial trend of the OPDF. In addition, this study produced the color maps which show the fitness of a given probability density function to represent the AMRT. The study found that (1) both L-skewness and L-kurtosis of the AMRT have clear geographical trends, which means that the extreme rainfall events are highly influenced by geography; (2) the impact of the altitude on these two rainfall statistics is greater for the mountaneous region than for the non-mountaneous region. In the mountaneous region, the areas with higher altitude are more likely to experience the less-frequent and strong rainfall events than the areas with lower altitude; (3) The most representative OPDFs of Korea except for the Southern edge are Generalized Extreme Value distribution and the Generalized Logistic distribution. The AMRT of southern edge of Korea was best represented by the Generalized Pareto distribution.
Status of Birds in the Nakdong River Estuary Bird Sanctuary before the Four Major Rivers Project
Kim, Bum-soo ; Yeo, Unsang ; Oh, Dongha ; Sung, Kijune ;
Journal of Wetlands Research, volume 17, issue 3, 2015, Pages 264~272
DOI : 10.17663/JWR.2015.17.3.264
Understanding bird status is essential for the systematic and sustainable management of the Nakdong River Estuary, taking into consideration the relationship between ecosystems and the bird species. In this study, bird status in the Nakdong River Estuary Bird Sanctuary prior to the Four Major Rivers Project was analyzed using the bird monitoring data (2003-2011) from surveys conducted by the Busan Development Institute. The high percentage of winter visitors in terms of both species diversity (38.36%) and individual bird numbers (63.14%) suggest that the Nakdong River Estuary is an important wintering site for migratory birds. Cumulative numbers of individual birds were higher in Myungji (208,601), West Nakdong River (202,444), Eulsukdo (153,232), and Baekhap Doyodeung (150,595). The total numbers of migratory species were higher in Eulsukdo (171), Ilungdo (124), Myungji (132), and Samrak (121). Among the 232 species found in the Nakdong River Estuary, Anas platyrhynchos (17.71%) was the most common species, followed by Anas poecilorhyncha (8.85%), Larus crassirostris (6.48%), Anser fabalis (6.09%), Anas penelope (5.16%), and Calidris alpina (4.22%). Most bird taxa, except shelducks, showed annual fluctuations in individual numbers, with increasing frequency during survey periods. Of these, cormorants, swans, and gulls showed higher fluctuations than other taxa. Swans decreased drastically in numbers in 2007-2008 and 2009-2010 compared to previous years. Shore birds, gulls, wagtails, and other forest birds were also less common in 2010-2011. These results suggest that there were some environmental changes that might have affected the birds in the Nakdong River Estuary. Overall, the results suggest that habitat types affect the distribution of dominant species.
The Study of Adaptable Plant Species to the Change of Warmth Index by Using RCP4.5 and RCP8.5 Scenarios in Seoul City
Kong, Seok-Jun ; Kim, Jeong-Seob ; Yang, Keum-Chul ; Kim, Kyeong-Jin ;
Journal of Wetlands Research, volume 17, issue 3, 2015, Pages 273~282
DOI : 10.17663/JWR.2015.17.3.273
This study suggested the adaptable plant species according to the change of warmth index (WI) through the Representative Concentration Pathway (RCP) 4.5 & 8.5 climate change scenarios from 2010 to 2099 in Seoul areas. From the scenario analysis results, we expected to change from the cool temperate souther forest zone to the warm temperate forest zone. We found the following adaptable 27 plant species: 6 species in the tree layer, Quercus serrata, Q. variabilis, Pinus densiflora, Q. acutissima, Styrax japonica and P. thunbergii etc.; 7 species in the shrub layer, Ligustrum obtusifolium, Lespedeza maximowiczii, Rhus trichocarpa, Callicarpa japonica, Rubus crataegifolius, Rosa multiflora, and Zanthoxylum piperitum etc.; 3 species in the herb layer, Oplismenus undulatifolius, Pteridium aquilinum var. latiusculum, and Commelina communis ect;, 11 species in the vine plants Smilax china, Cocculus trilobus, Parthenocissus tricuspidata, Lonicera japonica, Paederia scandens, Celastrus orbiculatus, Clematis apiifolia, Rubus parvifolius, Dioscorea batatas, Hydrangea serrata for. acuminata, Zelkova serrata etc.
Study on effect on CO
flux of wetland soil by feces of Korean water deer(Hydropotes inermis)
Park, Hyomin ; Chun, Seunghoon ; Lee, Sangdon ;
Journal of Wetlands Research, volume 17, issue 3, 2015, Pages 283~292
DOI : 10.17663/JWR.2015.17.3.283
The total global emission of
from soils is recognized as one of the largest fluxes in the global carbon cycle. Especially it is necessary to quantify the amount of
emitted by the organic material decomposition processes of microorganisms in the soil, because it becomes one of a factor for determining the carbon stocks in the soil. This study was conducted to estimate the impact of the Korean water deer(Hydropotes inermis)` feces to the soil organic matter. Also, effects of Korean water deer` feces on
emissions of soil and land use pattern dependent
flux quantification are studied. The organic materials in the Korean water deer` feces significantly changed organic matter content of soil and influenced the activity of soil microorganisms, both changing of respiration of the soil and physical chemical components in soil. In particular, C/N ratio and the
flux of soil of four regions (Rice paddy, Fallow ground, Salix koreensis community, Phragmites australis community) showed a statistically highly significant correlation (P<0.01) with the presence or absence of feces.
flux of soil affected by the feces was 2-20 times higher than the soil unaffected by the feces. This study has great significance to quantify the extent of the material circulation and its impact to the terrestrial ecosystem and soil zone throughout Korean water deer` feces. Feces of wildlife can affect soil and soil material circulation.
Sediment Oxygen Consumption Rate and Hydrogen Sulfide Release by Dissolved Oxygen Depletion in Hypoxic Area of the Gamak Bay, Korea
Lee, Taehee ;
Journal of Wetlands Research, volume 17, issue 3, 2015, Pages 293~302
DOI : 10.17663/JWR.2015.17.3.293
This study investigated sediment oxygen consumption rates and geochemical characteristics of sediment in hypoxic area of the Gamak Bay based on the chamber experiments and geochemical analyses. The organic carbon contents of surface sediment in the Gamak Bay showed that the inner bay area has higher organic carbon content than those of the outer bay. They toward the outer bay, contents dropped off. The vertical profiles of calcium carbonate (
) content at piston core sediment assumed that the hypoxia have been frequently occurred during past century in the northern inner bay. The benthic chamber experiments were conducted in February, May, August and November 2010, 2011 in the hypoxic area of the Gamak Bay. In the sediment incubation experiment with chamber at site C3 in the northern inner bay and site C17 in the southern outer bay, the sediment oxygen consumption rate ranged from
, respectively. When the oxygen was completely depleted, the toxic hydrogen sulfide was released with
Analysis of Factors Affecting Retention Time in Grassed Swale
Paek, Seoungbong ; Gil, Kyungik ;
Journal of Wetlands Research, volume 17, issue 3, 2015, Pages 303~310
DOI : 10.17663/JWR.2015.17.3.303
Recently the water quality management policy gives priority to management the point source. Point pollution sources have definite emission points and are discharged to one point through a pipe. But Nonpoint pollution source (NPS) has uncertain pathway, pollutant load and runoff characteristics unlike point pollution sources, making them difficult to manage. Thus, the Korea government plans to develop and equip facilities that help reduce NPS so as to manage them more easily. But removal efficiency of Best Management Practice (BMPs) is in influenced by rainfall, hydrologic condition like natural phenomenon, so factors of removal efficiency are difficult. Thus there is a need for multilateral research about many factors that affect removal efficiency for removal facility design of proper non-point pollution. In this research, mapping, vegetation coverage and retention time were investigated in the case of factors that affect removal efficiency in grassed swale, a nature-type non-point removal facility. Grassed swale obtained changed of coverage using Braun-Blanquet within swale and retention time was obtained from point that rainfall effluent enters into swale to the time that first outflow starts. Besides, correlation analysis was obtained using pearson correlation analysis method. As a result, it was shown that removal efficiency increases as retention time is longer in grassed swale and that retention time increases as vegetation coverage is higher.
Changes of Treatment Efficiency According to Seasonal Variation in Rural Area
Im, Jiyeol ; Gil, Kyungik ;
Journal of Wetlands Research, volume 17, issue 3, 2015, Pages 311~319
DOI : 10.17663/JWR.2015.17.3.311
The Korean government has made progress in its project for sewage distribution in rural areas to ensure the balanced development of the country and its water conservation system. The project for sewage distribution in rural areas was analyzed with the yearly operational results of municipal wastewater treatment plant (MWTP). The sewage characteristics of the MWTP in a rural area changed according to seasonal variations, and the lowest pollution concentrations were obtained in the summer. The treatment efficiency of nutrients in the biological treatment process changed slightly more than the treatment efficiency of organic compounds, and the lowest treatment efficiency was obtained in winter. In addition, the relationship between treatment efficiency and retention time and F/M ratio showed similar results despite seasonal variations. It was considered that sewage characteristics and treatment efficiency changed according to seasonal variations when the treatment process was selected in MWTPs in rural areas. Especially, Maintenance of MWPT is need for the stable treatment efficiency of nutrients in the winter.
The effect of three different water temperatures in our research facility on Huanren brown frog (Rana huanrensis) egg`s hatching rate, hatching periods, and larvae`s growth
Na, Sumi ; Shim, Jeong-eun ; Kim, Hyun-jung ; An, Chi-Kyung ; Yi, Hoonbok ;
Journal of Wetlands Research, volume 17, issue 3, 2015, Pages 320~324
DOI : 10.17663/JWR.2015.17.3.320
This study was executed to know the effect of three differently controlled temperature conditions on Huanren brown frog (Rana huanrensis )`s growth in 2013. We`ve collected nine Huanren brown frog egg`s sacs on Mt. Surak (
) in Seoul. We put those nine egg sacs in the controlled growth chambers under low temperature (LT,
), medium temperature (MT,
), and high temperature (HT,
) conditions with three egg sacs, respectively. We measured the eggs` hatching rate, their hatching periods, and the size of the hatched individuals. The hatching rate was higher in MT (95.6%) and the rates of the other treatments were relatively lower but very similar such as LT (82.2%) and HT (82.6%). The three hatching periods were 10 days at HT, 14 days at MT and 23 days at LT. The body sizes of the hatched individuals were biggest at MT (
), smallest at LT (
) and medium at HT (
). From our results, we found that the various water temperatures could be very effective to Huanren brown frog eggs` hatch and growth including their body sizes. We suggest if we study more about the growth of Huanren brown adult frogs under similar temperature conditions for a long term period, it must be very helpful for conservation study about metamorphosis rate and size of adult frog as well as we could understand about the amphibians who are adapting to the climate change.