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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Wetlands Research
Journal Basic Information
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
Evaluation of Pilot scale Coagulation system Design for CSOs treatment
Lee, Seung-Chul ; Ha, Sung-Ryong ;
Journal of Wetlands Research, volume 15, issue 1, 2013, Pages 1~8
DOI : 10.17663/JWR.2013.15.1.001
A pilot scale coagulation system, which has a function of physicochemical treatment, was developed to treat Combined sewer overflows(CSOs). This coagulation system requires evaluation of optimum design factors whether it has reflected those of lab scale system, moreover, the pilot scale system can be evaluated differently according to the characteristics of influent CSOs even though it has reflected lab scale's design factors. We conducted an experiment using lab scale system that could treat
of CSOs in a day, and also pilot-scale system with
CSOs flowed into the Cheongju sewage treatment plant. Therefore the aim of this study is to evaluate a hydraulic similarity between the design factors of pilot scale and those of lab scale coagulation system, and to evaluate feasibility of the coagulation system for the CSOs treatment with optimum operation conditions. From the result of pilot-test, we drew the optimum operation factors of in line mixer and flocculator having similarities with those of lab scale system as well as the optimum coagulant dose. Finally we confirmed that the coagulation system has feasibility to treat the CSOs with high removal efficiency.
Relationship of Initial Density, Biomass and Tuber Productivity of Scirpus planiculmis in the Nakdong River Estuary
Yi, Yong Min ; Yeo, Un Sang ; Sung, Kijune ;
Journal of Wetlands Research, volume 15, issue 1, 2013, Pages 9~17
DOI : 10.17663/JWR.2013.15.1.009
Scirpus planiculmis dominated in Nakdong river estuary is known as food for birds visiting to Nakdong river estuary and plays an important role in material cycle and food web, while repeating growth and production, decomposition process in 1-year interval. Therefore, if it is able to predict effectively biomass or tuber production of Scirpus planiculmis which is food source for estuarine organisms or birds, it can provide very useful information on the Nakdong river estuary management. In this study, regression equation that can predict the tuber production, food for birds, was obtained using initial density of Scirpus planiculmis that can minimize the disturbance of ecosystem and is faster and easier. The correlation analysis results show that density, biomass and tuber production have liner relationship(p<0.001) with 0.6103~0.9950 of correlation coefficients. In addition, the regression equations have high coefficients of determination of 0.3696~0.7145 and it shows that it is able to predict biomass or tuber production while using the estimated regression equation obtained from relationship among the initial density, biomass and tuber production. The results of this study are expected to utilize effectively the management of estuary ecosystem such as management on food source for migratory birds visiting to Nakdong river estuary.
A Study on the Ecosystem Service of Wetland -1. Effective Biological Control of the Mosquito Larvae using Native Fishes
Jeong, Heon Mo ; Kim, Hae Ran ; You, Young Han ;
Journal of Wetlands Research, volume 15, issue 1, 2013, Pages 19~24
DOI : 10.17663/JWR.2013.15.1.019
To assess on the biological control potential with the native fishes, Aphyocypris chinensis, Oryzias sinensis, Misgurnus mizolepis, Pseudorasbora parva, Carassius auratus, Odontobutis interrupta were tested in relation to optimal condition controling mosquitoes in Seosan region. As a result of larvivorous activity for predation rate and temperature difference along kinds of native fishes, predation rate of Aphyocypris chinensis was the highest and predation rate of Misgurnus mizolepis was the lowest under the
. Contrastively, predation rate of Aphyocypris chinensis and Odontobutis interrupta was the highest in least time. Predation rate of Misgurnus mizolepis was the lowest under the all temperature among six species fishes. Aphyocypris chinensis and Pseudorasbora parva in low, Carassius auratus, Misgurnus mizolepis and Odontobutis interrupta in bottom appeared high predation rate along the water depth. And predation rate of Oryzias sinensis was high as 95% at surface. As a result of measuring time taken to predate 50 mosquito larvae by 3 species fishes, two Aphyocypris chinensis took 10minutes, two Oryzias sinensis took 21min., two Misgurnus mizolepis took 45min. But one Aphyocypris chinensis and Misgurnus mizolepis took 8min., one Misgurnus mizolepis and Oryzias sinensis took 17min.
The Ecological Characteristics and Conservation Counterplan of Menyanthes trifoliata Habitat in Floating Mat in Korean East Coastal Lagoon, Sunyoodam
Kim, Heung-Tae ; Lee, Gwang-Moon ; Kim, Jae Geun ;
Journal of Wetlands Research, volume 15, issue 1, 2013, Pages 25~34
DOI : 10.17663/JWR.2013.15.1.025
The purpose of this study is to investigate the properties of Menyanthes trifoliata habitat in coastal lagoons. To characterize plant composition in the habitats in the lagoon, the plot sampling method was applied. The depths of water and floating mat were measured. Surface water quality factors including pH, electrical conductivity (EC), dissolved oxygen (DO), and total dissolved solids (TDS) were measured in the sites. Phosphate, nitrate, ammonium, and major cations were measured in laboratory. The wetland has 78 taxa of wetland plants. The average coverage and density of M. trifoliata was 62.6% and
, respectively and Phragmites australis is important associate in Sunyoodam lagoon. The average depths of floating mats were 26.5cm in M. trifoliata and 68.9cm in the P. australis-M. trifoliata communities, and the water depth below the mat was 106.5cm and 17.7cm, respectively. The values of pH, DO, EC and TDS in the water were 5.06, 46.1%, 59.4
, and 29.3 mg/L, respectively. The concentrations of phosphate, nitrate, and ammonium showed 47.2, 9321, and 15.9
, respectively. The concentrations of Ca, K, Na, and Mg had 11.1, 1.5, 15.1, and 11.3 mg/L, respectively. The habitats of M. trifoliata in the lagoon corresponds to a kind of lowland communities in Hewett's classification. To conserve the habitats of M. trifoliata in Sunyoodam lagoon, the supply of open water area, the construction of observation deck, and the block of inflow from the surrounding paddy fields are needed in the future.
Cutting Efficiency Using Phragmites australis Culms According to Content and Timing of Indole-acetic Acid Treatment
Hong, Mun-Gi ; Kim, Jae Geun ;
Journal of Wetlands Research, volume 15, issue 1, 2013, Pages 35~41
DOI : 10.17663/JWR.2013.15.1.035
In this study, we tried to overcome a limit in cutting timing of reed culm by applying a plant hormone, indole-acetic acid (IAA) as a growth regulator with various contents (
M). 19 shoots emerged from 240 segments of hardened reed culm from montane fen and eight out of the 19 shoots emerged by
M IAA treatment as the most in
Sep. 2012. 50 shoots emerged from 60 segments of non-hardened reed culm from a population in Seoul National University transplanted from Mt. Odae by
M IAA treatment despite the cutting was performed about two weeks later (
Sep.). Via third cutting experiment performed about 40 days later (
Oct.), only two shoots out of 60 segments were observed by the same experimental condition except atmospheric temperature. It seemed likely that it was too low temperature in third experiment (
) than the former experiments (about
) to form adventitious buds from culm segment. We recommend to utilize the thick reed culm in culm cutting as possible because the thicker culm segment we used, the thicker emerged shoot we could observe (i.e., diameters of emerged shoots were about 20% of the planted segment's diameters).
Groundwater-surface water interaction of the upstream area of the dam composed of accumulated sediments and reservoir in the upstream area of Searsvill Dam
Kim, Dongkyun ;
Journal of Wetlands Research, volume 15, issue 1, 2013, Pages 43~50
DOI : 10.17663/JWR.2013.15.1.043
The groundwater-surface water interaction of Searsville Lake area, California, US was analyzed using 3-dimensional groundwater model. This study especially focuses on investigating the groundwater head drawdown near the lake when the abrupt decline of the lake water table occurs due to the implementation of the options to remove the accumulated sediments along the dam. The result of the investigation revealed that the groundwater head drawdown near the lake is not significant enough to adversely affect the wetland habitat of the area regardless of the hydrogeologic parameters of the aquifers. We expect this result provides useful information to the similar Korean case studies in which the surface water level abruptly changes due to the operation of the hydraulic gates of dams and wiers and the corresponding environmental impact should be considered.
An Experimental Study on Dredging Efficiency for Cutter Head Type
Park, Jae Hyeon ; Kim, Young Do ; Lee, Man Soo ;
Journal of Wetlands Research, volume 15, issue 1, 2013, Pages 51~58
DOI : 10.17663/JWR.2013.15.1.051
In this study, the hydraulic experiments were conducted for the dredging efficiency of the cutter head type, which includes the open type and the close type cutter head. The dredging experimental instrument was installed in the large water tank which has the dimension of
. The dredging experiments were performed for the various conditions of dredging depth, rotating speed, and suction speed of the cutter head. As the results, the dredging efficiency of the close-type cutter head is much higher than that of the open-type cutter head. The dredging efficiency of the same cutter head type was mainly influenced by the rotating speed of cutter head. Also the adequate suction speed of the cutter head is needed for more effective dredging.
A Study on Mixing Behavior of Dredging Turbidity Plume Using Two-Dimensional Numerical Model
Park, Jae Hyeon ; Kim, Young Do ; Lee, Man Soo ;
Journal of Wetlands Research, volume 15, issue 1, 2013, Pages 59~69
DOI : 10.17663/JWR.2013.15.1.059
The numerical simulations were performed to analyze the advection-diffusion processes of dredging-induced turbidity plume using RMA2 and RMA4 models in Bunam reservoir, Seosan, Chungnam. Field survey was also performed to measure the turbidity using the multi water quality monitoring system (YSI6600EDS). In the field survey, the vertical and horizontal distributions of the turbidity were measured during the dredging operation in Bunam reservoir. RMA2 model was used to simulate the velocity distributions in both the whole domain and the 2nd part of Bunam reservoir. RMA4 model was also used to simulate the concentration distribution in only the 2nd part of Bunam reservoir, where the dredging work were conducted. The comparison of the simulation results with the field data for the advection-diffusion of the turbidity plume using the concentration ratio concepts shows that the numerical model can be applied to analyze the environmental impact of dredging works.
Inhabitation Characteristics of Sphagnum palustre in Abandoned Paddy Terrace Wetland: a Case Report in Ansan
Hong, Mun-Gi ; Kim, Jae Geun ;
Journal of Wetlands Research, volume 15, issue 1, 2013, Pages 71~78
DOI : 10.17663/JWR.2013.15.1.071
An exceptional case of inhabitation of a Sphagnum sp. was firstly confirmed at abandoned paddy terrace (APT) wetland in Ansan. Water sampling for analyzing of physicochemical conditions including nutrients such as NP,
was performed and the vegetation map for distribution of Sphagnum sp., topographical map, and flora list for companion species were made at field in June 2011. From the results, the Sphagnum sp. in the study site was identified as S. palustre and it covered about 8% of the wetland cover of 3,200
. Most distributions of S. palustre were observed at tussock structures as micro-topography by sedges and grasses within a wetland (74%) and the shaded slope area under Pinus densiflora's canopy in wetland boundary (26%). Despite that APT in Ansan is relatively lower wetland in altitude than high moors, the contents of calcium (
) and magnesium (
) ion which are critical limiting factors for Sphagnum spp. were very low levels as well as NP (
) and it could enable the inhabitation of S. palustre in lower APT.
Reduction Efficiency of the Stormwater Wetland from Animal Feeding-Lot
Park, Kisoo ; Niu, Siping ; Kim, Youngchul ;
Journal of Wetlands Research, volume 15, issue 1, 2013, Pages 79~90
DOI : 10.17663/JWR.2013.15.1.079
Stormwater wetland targeted to treat the rainfall runoff from cow feeding-lot basin has been monitored from May 2010 to November 2011. Reduction efficiency estimated based on 20 rainfall event monitoring was 88%, 54%, 70%, 31%, and 64% for TSS, BOD,
, TN, and TP, respectively. Theoretically, as rainfall depth increases, hydraulic exchange ratio has to be increased. When the exchange ratio approaches to 1 (usually design goal), TSS reduction efficiency was estimated about 55%. Uncertainty in reduction efficiency of the stormwater wetland is normally very high due to the continuous rainfall activity, its magnitude and intensity, antecedent dry days, and other natural variables which can not be controlled by experiment conductors. In this study, predominant affecting variables was found to be hydraulics caused by consecutive rainfall events having different intensity and algal growth during dry days.
Analysis on Dimensional Stability of Porosity Soil Block for Vegetation Reinforcement
Park, Sang Woo ; Ahn, Tae Jin ; Ahn, Sang Ho ; Kwon, Soon Hyun ;
Journal of Wetlands Research, volume 15, issue 1, 2013, Pages 91~103
DOI : 10.17663/JWR.2013.15.1.091
In this Research, in order to improve problems of not enough technical validation and structural and hydraulic stability evaluation when nature-friendly revetment block is applied to field, hydraulic stability evaluation according to hydraulic behavior change of porosity soil block for vegetation reinforcement that secures ecological function was reviewed. By selecting object section, numerical analysis and hydraulic model experiments were performed; for numerical analysis, by using 1-dimensional numerical analysis model HEC-RAS and 2-dimensional numerical analysis RMA-2, one-dimensional(1D) and two-dimensional(2D) numerical analysis were performed; by applying Froude's similarity law, reduced-scale hydraulic model experiments according to vegetation existence were performed. In hydraulic model experiment, for validity of experiment result, the result of velocity and tractive force of reduced-scale hydraulic model experiments was converted to prototype so that it can be compared and reviewed under the same condition of one-dimensional(1D) and two-dimensional(2D) numerical analysis result; as a result, it was confirmed that comparatively united result appeared, and by comparing prototype-converted tractive force result with revetment's allowable tractive force coming from an existing research, block's hydraulic stability was suggested.
The Impact Assessment of Climate Change on Design Flood in Mihochen basin based on the Representative Concentration Pathway Climate Change Scenario
Kim, Byung Sik ; Ha, Sung Ryong ;
Journal of Wetlands Research, volume 15, issue 1, 2013, Pages 105~114
DOI : 10.17663/JWR.2013.15.1.105
Recently, Due to Climate change, extreme rainfall occurs frequently. In many preceding studies, Because of extreme hydrological events changes, it is expected that peak flood Magnitude and frequency of drainage infrastructures changes. However, at present, probability rainfall in the drainage facilities design is assumed to Stationary which are not effected from climate change and long-term fluctuation. In the future, flood control safety standard should be reconsidered about the valid viewpoint. In this paper, in order to assess impact of climate change on drainage system, Future climate change information has been extracted from RCP 8.5 Climate Change Scenario for IPCC AR5, then estimated the design rainfall for various durations at return periods. Finally, the design flood estimated through the HEC-HMS Model which is being widely used in the practices, estimated the effect of climate change on the Design Flood of Mihochen basin. The results suggested that the Design Flood increase by climate change. Due to this, the Flood risk of Mihochen basin can be identified to increase comparing the present status.
Spatial Downscaling Method for Use of GCM Data in A Mountainous Area
Kim, Soojun ; Kang, Na Rae ; Kim, Yon Soo ; Lee, Jong So ; Kim, Hung Soo ;
Journal of Wetlands Research, volume 15, issue 1, 2013, Pages 115~125
DOI : 10.17663/JWR.2013.15.1.115
This study established a methodology for the application of downscaling technique in a mountainous area having large spatial variations of rainfall and tried to estimate the change of rainfall characteristics in the future under climate change using the established method. The Namhan river basin, which is in the mountainous area of the Korean peninsula, has been chosen as the study area. Artificial Neural Network - Simple Kriging with varying local means (ANN-SKlm) has been built by combining artificial neural network, which is one of the general downscaling techniques, and SKlm technique, which can reflect the geomorphologic characteristics like elevation of the study area. The evaluation of SKlm technique was done by using the monthly rainfalls at six weather stations which KMA(Korea Meteorological Administration) is managing in the basin. The ANN-SKlm technique was compared with the Thiessen technique and ordinary kriging(OK) technique. According to the evaluation result of each technique the SKlm technique showed the best result.
Regional Frequency Analysis for Rainfall Under Climate Change
Song, Chang Woo ; Kim, Yon Soo ; Kang, Na Rae ; Lee, Dong Ryul ; Kim, Hung Soo ;
Journal of Wetlands Research, volume 15, issue 1, 2013, Pages 125~137
DOI : 10.17663/JWR.2013.15.1.125
Global warming and climate change have influence on abnormal weather pattern and the rainstorm has a localized and intensive tendency in Korea. IPCC(2007) also reported the rainstorm and typhoon will be more and more stronger due to temperature increase during the 21st century. Flood Estimation Handbook(Institute of Hydrology, 1999) published in United Kingdom, in the case that the data period is shorter than return period, recommends the regional frequency analysis rather than point frequency analysis. This study uses Regional Climate Model(RCM) of Korea Meteorological Administration(KMA) for obtaining the rainfall and for performing the regional frequency analysis. We used the rainfall data from 58 stations managed by KMA and used L-moment algorithm suggested by Hosking and wallis(1993) for the regional frequency analysis considering the climate change. As the results, in most stations, the rainfall amounts in frequencies have an increasing tendency except for some stations. According to the A1B scenario, design rainfall is increased by 7~10% compared with the reference period(1970-2010).
A Study of Ecotourism Activated Gede Pangrango National Park in Indonesia
Jeong, Kyongyeon ; Byun, Byungseol ;
Journal of Wetlands Research, volume 15, issue 1, 2013, Pages 139~147
DOI : 10.17663/JWR.2013.15.1.139
This study is thing about eco-tourism activated Mt. Gede Pangrango National Park in Indonesia. Indonesia is full of eco-tourist resources with the possession of the tropical forest. Particularly, Gede Pangrango National Park on the west of Java island has so plenty of bio-diversity that the UNESCO designated this park as the World Biosphere Reserve. By virtue of this, various visitors all over the world are visiting Gede Pangrango Park for doing research, education, hiking and camping. However, Indonesia lags behind other countries in convenience facilities for visitors, so their visiting programs are actually insufficient. In order for eco-tourism to be revitalized, there should be physical improvement in visiting facilities, management of a variety of visit programs, and local residents' participation & projects to increase the income of local residents. This study is going to seek for the environment-friendly management plan suited for the properties of the park and improvement plan for eco-visiting facilities by closely grasping the actual condition of the eco-tourism of Gede Pangrango National Park.
A Comparative Study on Hydraulic Jump and Specific Energy Losses at Downstream According to the Weir Discharge Types
Park, Hyo-Seon ; Yoon, Geun-Ho ; Koo, Bon-Jin ; Choi, Gye-Woon ;
Journal of Wetlands Research, volume 15, issue 1, 2013, Pages 149~157
DOI : 10.17663/JWR.2013.15.1.149
The weirs built so far are mainly overflow type weirs overflowing to the upstream. Main advantages of overflow type weirs are, effective water resources management and easy design, construction and maintenance due to many accumulated studies. However, due to the special feature of the overflow type weir where water overflows through the upstream of the weir, the silt coming from the upstream is not discharged to the downstream of the weir. This increases the river bed and reduces the reservoir capacity, and as a result, the weir loses its function. A underflow type weir with a water gate has been implemented in order to solve such sediment deposit and weir maintenance problems. However due to the design problem of recently constructed underflow type weirs, the river bed of the downstream of a weir has been scoured. And this leds to a structural problem. In this study, the flow characteristics of overflow type weirs and underflow type weir, hydraulic jump length analysis depending on change of water depth and the amount of specific energy loss generated per unit length depending on a weir type have been compared and analyzed, for the effective design and management of the weirs. The experiment results show that, when identical upstream conditions of underflow type weir and an overflow type weir were maintained, the hydraulic jump length was up to twice longer with Fr(Froude number) 3.5 of the hydraulic jump length at the underflow type weir, and the hydraulic jump length gradually decreased as the downstream water depth increased. The comparative analysis result of the amount of specific energy loss generated per unit length showed that the amount of energy loss per unit length was twice higher for an overlfow type weir than a underflow type weir. Therefore, in case of a underflow type facility, an additional energy reduction facility is determined to be necessary for safety of water construction structures.