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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
Editor in Chief :
Volume & Issues
Volume 16, Issue 4 - Nov 2014
Volume 16, Issue 3 - Aug 2014
Volume 16, Issue 2 - May 2014
Volume 16, Issue 1 - Feb 2014
Selecting the target year
Estimation of baseflow considering recession characteristics of hydrograph
Jung, Younghun ; Lim, Kyoung Jae ; Kim, Hungsoo ;
Journal of Wetlands Research, volume 16, issue 2, 2014, Pages 161~171
DOI : 10.17663/JWR.2014.16.2.161
Recession of hydrograph gives a significant contribution to estimation of baseflow using rainfall-runoff models and baseflow separation methods, because recession affects baseflow. This study attempted to enhance the accuracy of streamflow predictions using a Soil and Water Assessment Tool (SWAT) model and to separate baseflow from the predicted streamflow. For this, this study used two scenarios: 1) to calibrate eleven parameters using an auto-calibration tool with the alpha factor obtained from RECESS (S1); and 2) to calibrate twelve SWAT parameters including alpha factor (one of SWAT parameters) using an auto-calibration tool (S2). Then, baseflow spearation from the predicted streamflow was conducted by using Web-based Hydrograph Analysis Tool (WHAT). The results show that there is no significant difference between Nash-Sutcliffe efficiency (NSE) values of S1 and S2 for calibrations to streamflow. However, calibrations to baseflow showed that NSEs are 0.777 for S1 and 0.844 for S2, which means a significant difference. Quantitatively compared to the observed streamflow, relative errors were 20.78 % for S1 and 6.59 % for S2. Finally, this study showed the importance of recession in baseflow separated from the predicted streamflow using a rainfall-runoff model.
Assessment of Future Climate Change Impact on Groundwater recharge, Baseflow and Sediment in Steep Sloping Watershed
Lee, Ji Min ; Jung, Younghun ; Park, Younshik ; Kang, Hyunwoo ; Lim, Kyoung Jae ; Kim, Hungsoo ;
Journal of Wetlands Research, volume 16, issue 2, 2014, Pages 173~185
DOI : 10.17663/JWR.2014.16.2.173
Climate change has caused detrimental phenomena such as heavy rainfall which could aggravate soil erosion. Accordingly, it is needed to evaluate the groundwater recharge, baseflow, and soil erosion for the efficient management of water resources and quality. In this study, future climate change scenarios were applied to the H aean-myeon watershed which is a steep sloping watershed in South Korea to analyze groundwater recharge, baseflow, sediment. Also, the variation of groundwater recharge, baseflow, sediment was analyzed according to the change of slope (5 %). Simulated periods were divided into three terms (2013 ~ 2040 years, 2041 ~ 2070 years, 2071 ~ 2100 years). As a result of this study, average groundwater recharge and baseflow increased by 50 %, 42 %, and sediment decreased by 72 %, respectively. In these regards, the suggested method will positively contribute to hydro-ecosystem and reduction of muddy water at a steep sloping watershed.
Characteristics of Habitat Use of Pheasant-tailed Jacana Hydrophasianus chirurgus in Upo Wetland
Baek, Chung-Ryul ; Kim, Taesung ; Lee, Jeong-Hyun ; Lee, Jayeon ; Yang, Byeonggug ;
Journal of Wetlands Research, volume 16, issue 2, 2014, Pages 187~192
DOI : 10.17663/JWR.2014.16.2.187
This study is on the characteristics of habitat use of Pheasant-tailed Jacana Hydrophasianus chirurgus in Upo-wetland from June to August in 2013. The purpose is population management of Pheasant-tailed Jacana. Four nests were founded which are located in
from the waterside. Pheasant-tailed Jacana made their nests above Euryale ferox which consists with water plants such as Salvinia natans, Spirodela polyrhiza, Ceratophyllum demersum, Hydrocharis duvia and so on. Human beings seem to be the biggest obstacle of their breeding, according to this, Pheasant-tailed Jacana moved their eggs. Only two out of four nests, they moved their eggs and the distance was 1 to 2 meters from the nests. Since plant community of Euryale ferox is extensively distributed and water level also keep stable in Upo-wetland, the number of Pheasant-tailed Jacana coming to Upo-wetland is expected to increase every year. In the past, the number of Pheasant-tailed Jacana coming to Korea was too little to include management plan, but now, we need to manage them because of their population growth and the regular advent.
Distribution pattern according to altitude and habitat type of the Red-tongue viper snake (Gloydius ussuriensis) in the Cheon-ma mountain
Do, Min-Seock ; Yoo, Jeong-Chil ;
Journal of Wetlands Research, volume 16, issue 2, 2014, Pages 193~204
DOI : 10.17663/JWR.2014.16.2.193
The distribution of animals is affected by habitat selection, and habitat type and prey resource are important factors affecting their survival. This study was conducted to investigate the distribution pattern of the Red-tongue viper snake (Gloydius ussuriensis) with respect to altitude, habitat type and distribution of potential prey resource in Cheon-ma mountain, Korea. The study area of Cheon-ma mountain was separated into three altitude categories (low, middle, and high altitude) and the habitat types were categorized according to presence or absence of aquatic ecosystem and the preferred habitat in relation to altitude was determined. The distribution pattern of Red-tongue viper snakes was significantly different according to altitude and habitat type: they were mainly distributed at low altitude and in the water valleys. The distribution pattern of the Red-tongue viper snake correlated with that of amphibians. The analyses of microhabitat use of the Red-tongue viper snake and amphibians showed that their microhabitat types were not different significantly in water valleys. In conclusion, Red-tongue viper snakes were mainly distributed in the water valleys at low altitude and this is because amphibians are important as potential prey of the Red-tongue viper snake in Cheon-ma mountain.
Basic Study on the Design and Optimization of Sonoreactors for Sonochemical Water/Wastewater Treatment Processes
Kim, Seulgi ; Son, Younggyu ;
Journal of Wetlands Research, volume 16, issue 2, 2014, Pages 205~212
DOI : 10.17663/JWR.2014.16.2.205
Ultrasound technology can be applied in various fields including environmental, energy, and material engineering processes. In this study the effect of liquid height/volume on calorimetric energy and sonochemical oxidation was investigated as one of the basic steps for the design of water/wastereater treatment sonoreactors. The liquid height was increased from 0 to
and it was found that both calorimetric energy and sonochemical oxidation were significantly increased at relatively high liquid height/volume where the power density was relatively low. The sonochemiluminescence (SCL) images for the visualization of the activity of cavitation also showed that larger and more stable active zone was formed with high SCL intensity at high liquid height/volume. Therefore, it was revealed that sonoreactors for water/wasterwater treatment could be significantly effective in terms of removal efficiency and energy consumption.
Flow Analysis Based on the Recovery of Lateral Connectivity in the River
Lee, Jin Woo ; Chun, Seung Hoon ; Kim, Kyu-Ho ; Kim, Chang Wan ;
Journal of Wetlands Research, volume 16, issue 2, 2014, Pages 213~220
DOI : 10.17663/JWR.2014.16.2.213
Recently, river maintenance is change due to concern for the environment increases. Thus, the river restoration and river environment is best part of river maintenance. In case of Korea, existing river is improvement straightly for flood control and transportation. When the stream channel is straightly, maintain stability is important. Thus, construction of levees along the river. The various river structures for the purpose of flood control and transportation are inhibit factors of longitudinal and lateral connectivity. Connectivity is defined as the maintenance of lateral, longitudinal, and vertical pathways for biological, hydrological, and physical processes. Long-term point of view, increased connectivity is very important for a healthy ecosystem composition. As the first step of river restoration, this study described theory and concept of river continuum and the numerical model was applied to a real topography to simulate the flow analysis with or without segregated and blocked space in the Mankyung river. The results of this study can be utilized to develop the watershed connectivity assessments methods in order to the river restoration.
Estimation of Soil Erosion and Sediment Outflow in the Mountainous River Catchment
Kim, DongPhil ; Kim, JooHun ;
Journal of Wetlands Research, volume 16, issue 2, 2014, Pages 221~233
DOI : 10.17663/JWR.2014.16.2.221
Soil erosion, transportation, and sedimentation by water flow often occur in a stream. This excessive occurrence threatens the safety of hydraulic structures, and aggravates natural disasters like flood. To prevent soil disaster according to the soil erosion, it is necessary to predict accurate sediment outflow primarily. Besides, it is very important to choose appropriate models by basin characteristics, to estimate accurate quantity of related factors, and to acquire available hydrological data. Therefore, the purpose of this study is to estimate soil erosion amount and sediment amount according to rainfall-runoff by using rainfall, discharge, and sediment in the Seolmacheon experimental catchment. And, it proposed sediment delivery ratio of the Seolmacheon catchment by result of studying sediment delivery ratio. Hereafter, this study will estimate sediment delivery ratio by basin characteristics, and formulate the method of estimating soil erosion and sediment outflow in various conditions by applying the results in other catchments.
Development and Application of Hydrological Safety Evaluation Guidelines for Agricultural Reservoir with AHP
Lee, Jae Ju ; Park, Jong Seok ; Rhee, Kyoung Hoon ;
Journal of Wetlands Research, volume 16, issue 2, 2014, Pages 235~243
DOI : 10.17663/JWR.2014.16.2.235
According to the "Safety Evaluation Detailed Instructions (Dam)", precise safety inspection is carried out for dams that exceed a certain scale. However, as the Hydrological Safety Evaluation from various evaluation standards is designed to evaluate the safety of existing dams considering PMF, the evaluation is much less applicable for most agricultural reservoirs. Therefore, the Hydrological Safety Guidelines for agricultural reservoirs are expected to be re-evaluated considering the diverse risk factors with the coefficient model and AHP in this study. The coefficient model has been developed by selecting the hydrological safety superordinate subordinate evaluation factors to reflect diverse risk factors of agricultural reservoirs. After calculating the sum of indicators score for each evaluation factors, validation procedures were performed for the questionnaire which a panel answered. The practical coefficient has eventually been estimated for the hydrological safety evaluation considering the diverse risk factors. The conclusions acquired based on the study done are that both most agricultural reservoirs were classified as flood defense capability is insufficient and agricultural reservoirs which meet embankment-freeboard standards considering PMF was overestimated.
Aboveground biomass estimation of Quercus glauca in evergreen forest, Kotzawal wetland, Cheju Island, Korea
Jeong, Heon-Mo ; Kim, Hae-Ran ; Cho, Kyu-Tae ; Lee, Seung-Hyuk ; Han, Young-Sub ; You, Young-Han ;
Journal of Wetlands Research, volume 16, issue 2, 2014, Pages 245~250
DOI : 10.17663/JWR.2014.16.2.245
This study developed allometry equation and estimated the aboveground-biomass of Quercus glauca, a warm-temperature, evergreen broad-leaved tree, growing in Kotzawal wetland located on Jeju Island. The allometric equations between DBH(diameter at breast height) and dry weights of stems (Ws), branches (Wb), leaves (Wl) and aboveground biomass (Wab) of Q. glauca were as follows: logWs=2.4042logDBH-1.3045, logWb=2.6436logDBH-1.6232, logWl =1.5428logDBH-1.3692 and logWab=2.3324logDBH-0.9181. The allometric equations between
and Ws, Wb, Wl, and Wab of Q.glauca were as follows : logWs=
between DBH and Ws, Wb, Wl and Wab were 0.9873, 0.9711, 0.7979 and 0.993, respectively. The
and Ws,Wb,Wl and Wab were 0.9841, 0.9174, 0.7537 and 0.9876, respectively. There was no significant difference between observed and calculated values of the allomatric equations from DBH and
(p>0.05, Kolmogorov-Smirnov test). Thus, to estimate the aboveground biomass of Q. glauca, use of DBH and
as an independent variables in the allometric equation is recommended.
The Analysis of Function and Factors for the Value Assessment of Ecosystem Service at Rice Paddy Wetland
Kong, Min-Jae ; Lee, Byung-Mo ; Kim, Nam-Choon ; Son, Jin-Kwan ;
Journal of Wetlands Research, volume 16, issue 2, 2014, Pages 251~259
DOI : 10.17663/JWR.2014.16.2.251
Recently, wetland and paddy wetland are being highlighted as the international environmental issues. However, research system which can assess paddy wetland is lacking. Thus, the purpose of this study is to assess the value of paddy wetland by applying RAM to paddy wetland. In addition, we would like to use this study as the data to establish assessment method for paddy wetland. 16 sites were selected as research targets based on altitude and soil. As the results of wetland assessment, 16 research target sites had total score of 212~227 and the average of 2.17~2.50. It was similar to those of Lacustrine Wetlands, Palustrine Wetland and Riverine Wetland which were sites in previous studies. The value could be recognized as the wetland. However, there was no difference in assessment results based on altitude and soil. It was found that all conservation values were the same. The factor the most closely affecting conservation value was the area. However, there was limitation to apply existing wetland assessment system to paddy wetland. In order to assess paddy wetland, factors such as rice farming methods, topography, vegetation, growth environment and biodiversity should be added. It was thought to supplement wetland assessment system through various further studies.
Evaluation of Combined Vertical and Horizontal Flow Sand-Filled Reed Constructed Wetland with Intermittent Feeding for Sewage Treatment
Seo, Jeoung-Yoon ;
Journal of Wetlands Research, volume 16, issue 2, 2014, Pages 261~268
DOI : 10.17663/JWR.2014.16.2.261
A sewage was treated using serially combined vertical(VFCW)and horizontal flow sand-filled reed constructed wetland(HFCW) with intermittent feeding. The sand had 1~3 mm diameter. The sewage entering the sewage treatment plant of Gyeonsang National University was fed into the reed constructed wetland bed for 10 minutes every 6 hours at the hydraulic load of
based on the surface ares of the VFCW. In the VFCW effluent pH values were lower than those of the influent, whereas they were higher than those of the influent in the HFCW. DO values were increased in VFCW, but they were decreased in the HFCW. The OTR was
in the VFCW and
in the HFCW. Average removal efficiencies were SS 94.80%, BOD 90.77%,
87.72%, T-N 64.74%,
-N 86.44%, T-P 87.70%. Nearly, half of T-N in the effluent was
-N but the concentration of
-N in the effluent was less than 0.64 mg/L.
The CT values Comparisons for Antibiotic Resistant Bacteria and Resistant Genes by Chlorination
Oh, Jun-Sik ; Kim, Sungpyo ;
Journal of Wetlands Research, volume 16, issue 2, 2014, Pages 269~274
DOI : 10.17663/JWR.2014.16.2.269
The purpose of this study is to compare CT (disinfectant concentration * time) values in removing the antibiotic resistance bacteria, antibiotic resistance gene and transfer of antibiotic resistance genes. Different concentration of chlorine(C) and contact time(T) according to the removal of antibiotic resistance was calculated for each. As a result, for the 90% removal of antibiotic resistant bacteria, around 176~353 mg min/L CT values are needed. For the removal of the antibiotic resistance gene, 195~372 mg min/L CT values are required. For the 90% reduction of antibiotic resistance gene transfer by chlorine disinfection, 187~489 mg min/L CT values are needed. Based on our results, higher CT value was required for removing antibiotic resistant genes rather than antibiotic resistance bacteria.
Feasibility Study of On-site Analysis on Ammonium ion
Jung, Yong-Jun ;
Journal of Wetlands Research, volume 16, issue 2, 2014, Pages 275~280
DOI : 10.17663/JWR.2014.16.2.275
Because ammonia in water body can cause water pollution as a result of generating ammonium ion, it is of importance in the management of water quality. This work performed to analyze the ammonium ion by measuring the color band length on the basis of modifying the indophenol method. When 1-naphthol was employed as a coloring agent, the maximum absorbance was shown near 720nm, where the proper injection was in the range of 0.5-1.5ml. About 80% of absorbance was observed after the color development was made within the 20 minutes. In the manufacturing of coloring agent, the proper concentration of NaOH was 1.5-2.5M, and the effect of pH on the color development is negligible. In addition, the color development was effectively in the region of room temperature.
Evaluation of Basin-Specific CH
emission flux from Intertidal Flat Sediments of Sogeun-ri, Taean, Mid-west Korea
Lee, Jun-Ho ; Jeong, Kap-Sik ; Woo, Han Jun ; Kang, Jeongwon ; Lee, Dong-Hun ; Jang, Seok ; Kim, Seong-Ryul ;
Journal of Wetlands Research, volume 16, issue 2, 2014, Pages 281~291
DOI : 10.17663/JWR.2014.16.2.281
In March to August 2013, the emission of gases (
, and LEL) was measured three times from the intertidal flat sediments at Sogeun-ri, Taean-gun, in the Mid-western seashore of Korea by using chamber method. After analyzing gas emission concentrations inside of flux enclosure chamber by using a GC equipped with Agilent 6890. The gas emission fluxes were calculated from a linear regression of the changes in the concentrations with time. The ranges of gas flux during the experimental period were
for VOC, respectively. The flux measurement results revealed that
fluxes during March in the relatively low sediment temperature (
) were significantly higher (
) than during June and August (
) in high sediment temperature (
flux to mean size of sediments and temperature of inner chamber exhibited strong positive correlation (