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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Korea Water Resources Association
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Journal DOI :
Korea Water Resources Association
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Volume & Issues
Volume 39, Issue 12 - Dec 2006
Volume 39, Issue 11 - Nov 2006
Volume 39, Issue 10 - Oct 2006
Volume 39, Issue 9 - Sep 2006
Volume 39, Issue 8 - Aug 2006
Volume 39, Issue 7 - Jul 2006
Volume 39, Issue 6 - Jun 2006
Volume 39, Issue 5 - May 2006
Volume 39, Issue 4 - Apr 2006
Volume 39, Issue 3 - Mar 2006
Volume 39, Issue 2 - Feb 2006
Volume 39, Issue 1 - Jan 2006
Selecting the target year
Analysis of Stream Discharge Characteristic at Control Point for Runoff Model Application
Lee, Sang-Jin ; Lee, Bae-Sung ; Ryoo, Kyong-Sik ; Hwang, Man-Ha ;
Journal of Korea Water Resources Association, volume 39, issue 11, 2006, Pages 905~914
DOI : 10.3741/JKWRA.2006.39.11.905
For an accurate rainfall-runoff simulation in the river basin, not evaluation of runoff model but accurate runoff data are very important. In this study, SSARR model was applied to the Geum River basin and these results are compared with runoff data observed at the Gongju gauging station. The model results didn`t good fit the discharge data determined from the rating curve at Gongju gauging station during normal and dry season, especially. For the reliability analysis for the existing rating curve, we observed new stream discharge set from 2003 to 2005. We also estimated long term runoff data from the base flow separation method and defined the hydraulic characteristics. The results show that the new observed stream discharge is similar to the rainfall-runoff model results but existing rating curve seems to be overestimated about 10-20% during normal and dry season. We found that the continuous monitoring and update for the existing rating curve at the gaging station are needed for accurate estimation of runoff data.
Analysis of Runoff Reduction Characteristics According to Alloted Detention System in Urban Area
Kim, Ji -Tae ; Kwon, Wook ; Kim, Young-Bok ; Kim, Soo-Jun ;
Journal of Korea Water Resources Association, volume 39, issue 11, 2006, Pages 915~922
DOI : 10.3741/JKWRA.2006.39.11.915
National Emergency Management Agency is planning a flood disaster mitigation system in urban area. This research is about analysis of runoff reduction efficiency of the alloted detention system which is one of flood disaster mitigation systems in urban area. The alloted detention system is composed of small to middle size detention facilities located in up and middle stream of urban basin. To analyze runoff reduction efficiency of alloted detention system, basic runoff analysis in test area has been carried out and runoff characteristics with size and locations of detention facilities has been simulated. The results of simulation are showing that alloted detention system can reduce the discharge of main stream and detention facilities` size and locations are major parameters of runoff reduction efficiency. It is concluded that alloted detention system can be a useful method in urban area`s flood disaster mitigation and can secure safety against flood damages in urban areas.
Effects of Changes of Climate, Groundwater Withdrawal, and Landuse on Total Flow During Dry Period
Lee, Kil-Seong ; Chung, Eun-Sung ; Shin, Mun-Ju ;
Journal of Korea Water Resources Association, volume 39, issue 11, 2006, Pages 923~934
DOI : 10.3741/JKWRA.2006.39.11.923
In this study, the effects of variability in climate, groundwater withdrawal, and landuse on dry-weather streamflows were investigated by input sensitivity analysis using SWAT (Soil and Water Assessment Tool). Since only dry-period precipitation and daily average solar radiation among climate variables have high correlation coefficients to total flow (TF), sensitivity analyses of those were conducted. Furthermore, an equation was derived from simulation results for 30 years by multiple regression analysis. It may be used to estimate effects of various climatic variations (precipitation during the dry period, precipitation during the previous wet period, solar radiation, and maximum temperature). If daily average maximum temperatures increase, TFs during the dry period will decrease. Sensitivities of groundwater withdrawal and landuse were also conducted. Similarly, groundwater withdrawals strongly affect streamflow during the dry period. However, landuse changes (increasing urbanization) within the forested watershed do not appear to significantly affect TF during the dry period. Finally, a combined equation was derived that describes the relationship between the total runoff during the dry period and the climate, groundwater withdrawal and urban area proportion. The proposed equation will be useful to predict the water availability during the dry period in the future since it is dependent upon changes of temperature, precipitation, solar radiation, urban area ratio, and groundwater withdrawal.
Sustainable Water Resources Planning to Prevent Streamflow Depletion in an Urban Watershed: 1. Methodology
Lee, Kil-Seong ; Cung, Eun-Sung ; Kim, Young-Oh ; Cho, Tak-Gun ;
Journal of Korea Water Resources Association, volume 39, issue 11, 2006, Pages 935~946
DOI : 10.3741/JKWRA.2006.39.11.935
This study proposed a new procedure of sustainable water resources planning to prevent the urban streamflow depletion, based on the Heathcote`s study in 1998: (1) to understand the watershed component and processes, (2) to identify and quantify problems within the watershed, (3) to set clear and specific goals, (4) to develop a list of management options, (5) to eliminate infeasible options, (6) to test the effectiveness of remaining feasible options, and (7) to develop the final options. PSR(Presure-State-Response) concept was used for the determination of indicators of PSD(Potential Streamflow Depletion; step 2) and effect equation (step 7) and composite programming for the calculation of PSD. The instreamflow requirement was proposed as clear and specific goal (step 3) and was determined by the larger of the PHABSIM`s environmental flow and the drought flow. A continuous rainfall-runoff model is necessary to test the effectiveness of alternatives. It should estimate not only the exact runoff but also the effect of landuse change, reservoir, infiltration facility and so on like SWAT(Soil and Water Assessment Tool). The proposed procedure will be applied on the corresponding paper.
Sustainable Water Resources Planning to Prevent Streamflow Depletion in an Urban Watershed: 2. Application
Lee, Kil-Seong ; Cung, Eun-Sung ; Shin, Mun-Joo ; Kim, Young-Oh ;
Journal of Korea Water Resources Association, volume 39, issue 11, 2006, Pages 947~960
DOI : 10.3741/JKWRA.2006.39.11.947
This study shows the application of sustainable water resource planning procedure developed in the previous paper. Its goal is to prevent the streamflow depletion in upstream watershed of the Anyangcheon which is a typical urban stream. The pressure-state-response model which is the framework to reflect the sustainability was applied. The composite programming which is the multilevel multicriteria decision making technique is also used in the calculation of state and evaluation index. The feasible alternatives were proposed and hydrologically analyzed by SWAT(Soil and Water Assessment Tool) and the priority ranking of alternatives were proposed based on the results of SWAT.
A Study of Siltation in a Small Harbor
Yoon, Seong-Jin ; Kim, Kyu-Han ;
Journal of Korea Water Resources Association, volume 39, issue 11, 2006, Pages 961~968
DOI : 10.3741/JKWRA.2006.39.11.961
Since a small harbor is often located near surf zone areas which have great influences of sediment transport, there is a great possibility that the sediment will be deposited inside of the harbor. The sediment transport occurring around the harbor entrance can`t be explained by the wind wave and wave induced current. In this study, it was investigated the mechanism of the entrainment of sediment into a small harbor with permeable breakwater using hydraulic experiments in 3D wave basin. It is found out that the significant sediment entrainment produced when the mode of oscillation in the harbor became the 1st mode. In the case where the incident wave period was shorter than the period that caused higher mode oscillation in harbor, only a little amount of sediment entrainment took place. The vortex shedding from the top of secondary breakwater played very important roll in the entrainment of sediment into the harbor. It is also found that the small jetty attached at the top of secondary breakwater could effectively prevent the entrainment of sediment into the harbor.
A Study on the Extraction of Flood Inundated Scar of Rural Small Stream Area Using RADARSAT SAR Images
Lee, Mi-Seon ; Park, Geun-Ae ; Kim, Seong-Joon ;
Journal of Korea Water Resources Association, volume 39, issue 11, 2006, Pages 969~976
DOI : 10.3741/JKWRA.2006.39.11.969
The purpose of this study is to trace the flood inundation area around rural small stream by using RADARSAT image because it has the ability of acquiring data during storm period irrespective of rain and cloud. For the storm August 9, 1998 in the Anseong-cheon watershed, three RADARSAT images before, just after and after the storm were used. After ortho-rectification using 5 m DEM, two methods of RGB composition and ratio were tried and found the inundated area in the tributary stream, the Seonghwan-cheon and the Hakjeong-cheon. The inundated area had occurred at the joint area of two streams, thus the floodwater overflowed bounding discharge capacity of the stream. The progression of damage areas were stopped by the local road and farm road along the paddy. The result can be used to acquire the flood inundation data scattered as a small scale in rural area.
Optimal Determination of the Parameters Representative of a Basin in the Horton`s Infiltration Model
Yoo, Ju-Hwan ;
Journal of Korea Water Resources Association, volume 39, issue 11, 2006, Pages 977~984
DOI : 10.3741/JKWRA.2006.39.11.977
The parameters in the Horton`s model which has well known as typical infiltration model were determined by the use of the optimization technique. It was assumed the initial infiltration capacity in this model was related to the antecedent precipitation per 10 days with linear combination. And both the parameters of the ultimate infiltration capacity and the decay factor were determined uniquely on a basin. Thus the optimal model`s parameters representative to a basin were obtained and the Horton`s infiltration equations by rainstorm events were determined. The data of ten rainstorm events for this study were observed at the Jeonjeokbigyo station located at the Selmacheon experimental basin that was
wide in the Imjin river.