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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Korea Water Resources Association
Journal Basic Information
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
The assessment of the contribution of overland flow to basin response by means of hydrological approach
Kim Joo-Cheol ; Yoon Yeo-Jin ; Kim Jae-Han ;
Journal of Korea Water Resources Association, volume 39, issue 7, 2006, Pages 553~562
DOI : 10.3741/JKWRA.2006.39.7.553
The relative contributions of overland-flow and stream-flow to the response process at the basin scale are evaluated in the present study. The moments of GIUH models were applied to the data of the Bocheong watershed in the Geum river basin in Korea in order to discuss the feasibility. The GIUH model derived in this study consists of the stream path and overland region. The characteristic velocities for the flows between two cases mentioned above make a clear distinction as expected and would have more physical meaning than the ones of the model by Rodriguez-Iturbe and Valdes(1979). The path lengths of overland for each stream order are nearly constant, whereas the case of stream is shown to grow larger according to the basin sizes. As a result, the overall basin response process was founded out to be greatly under the influence of the hydrodynamic behavior of overland, and its behavior is suggested to be further researched for catching the broader meanings.
Consumer’s Willingness To Pay for Residential Water and It’s Policy Implication
Park Doo-Ho ; Park Yoon-Shin ; Lee Gwang-Man ;
Journal of Korea Water Resources Association, volume 39, issue 7, 2006, Pages 563~574
DOI : 10.3741/JKWRA.2006.39.7.563
Economic theory tell us, consumers always make a choice to maximize their utility. In the market system, consumers' choices are revealed and policy maker taking into account the aggregated consumers choice such as price, supply and demand. However, water resources as a public goods, therefore typically there is no market and does no aggregated information for residential water use. This study explore the consumers' willingness to pay for higher quality for residential water. Over 1,000 households responded for this survey and willingness to pay has been estimated. Furthermore, consumers' behaviors of residential water are examined. Consumers are willing to reduce the amount of water use with more than 50% of increasing water price, but stay almost constant with less than 25% of increasing which mean that current price level is not high enough to derive water saving. If consumers can have better quality of water, they willing to pay additional 16%,
, more than their current price. Based on the derived information, we suggested policy direction for residential water policy.
A Study on the Risk - based Local Normal CSOs Curve Designs
Jo Deok-Jun ;
Journal of Korea Water Resources Association, volume 39, issue 7, 2006, Pages 575~581
DOI : 10.3741/JKWRA.2006.39.7.575
This paper presents a systematic approach for the economical design of stormwater quality control systems. For the design of runoff quality control system (RQCS), the rainfall-runoff process requires the local rainfall data recorded continuously. In this study the rainfall probability distribution is assumed to follow an exponential decay function. Applying the exponential decay function, the normalized curves are derived to explain the non-exceedance probability distributions. The optimal curves for the determination of the RQCS size are derived based on the overflow risk. Comparison of the optimal capture volume and peak runoff rate to those computed by an urban rainfall-runoff model(ILLUDAS) demonstrates that the optimal CSOs(Combined Sewer Overflows) curves derived in this study can be utilized for the design of stormwater quality control systems in Korea avoiding an excessive computational effort based on over flow risks.
An Experimental Study on Scout Area around Groynes with Permeability and Install Angle
Yeo Hong-Koo ; Kang Joon-Gu ; Kim Sung-Jung ; Rho Young-Sin ;
Journal of Korea Water Resources Association, volume 39, issue 7, 2006, Pages 583~592
DOI : 10.3741/JKWRA.2006.39.7.583
There has been debated on the fact that a scour hole produced by the construction of a groyne has environmental benefits such as provision of diverse underwater habitats and shelter for fish in the event of flooding. Therefore researches are focusing on the scour field around the groyne area beyond the existing safety issues. The scour area on aquatic habitats would format many form on groyne conditions so that the analysis of scour area is strongly required. This study conducted the experiments on permeability and installation angle of groyne and suggested the data for groyne selection in environmental point as analyzing scour area. The physical modeling was performed in different permeability (0%, 20%, 40%, 60%, 80%) and installation angle of groyne (
). As the result of the study, scour area and scour depth at maximum scour condition was revealed for each case and suggested the differences according to experiment conditions.
The optimal parameter estimation of storage function model based on the dynamic effect
Kim Jong-Rae ; Kim Joo-Cheal ; Jeong Dong-Kook ; Kim Jae-Han ;
Journal of Korea Water Resources Association, volume 39, issue 7, 2006, Pages 593~603
DOI : 10.3741/JKWRA.2006.39.7.593
The basin response to storm is regarded as nonlinearity inherently. In addition, the consistent nonlinearity of hydrologic system response to rainfall has been very tough and cumbersome to be treated analytically. The thing is that such nonlinear models have been avoided because of computational difficulties in identifying the model parameters from recorded data. The parameters of nonlinear system considered as dynamic effects in the conceptual model are optimized as the sum of errors between the observed and computed runoff is minimized. For obtaining the optimal parameters of functions, the historical data for the Bocheong watershed in the Geum river basin were tested by applying the numerical methods, such as quasi-linearization technique, Runge-Kutta procedure, and pattern-search method. The estimated runoff carried through from the storage function with dynamic effects was compared with the one of 1st-order differential equation model expressing just nonlinearity, and also done with Nash model. It was found that the 2nd-order model yields a better prediction of the hydrograph from each storm than the 1st-order model. However, the 2nd-order model was shown to be equivalent to Nash model when it comes to results. As a result, the parameters of nonlinear 2nd-order differential equation model performed from the present study provided not only a considerable physical meaning but also a applicability to Korean watersheds.
Soil Moisture Monitoring at a Hillslope Scale Considering Spatial-Temporal Characteristics
Oh Kyoung-Joon ; Lee Hye-Sun ; Kim Do-Hoon ; Kim Hyun-Jun ; Kim Nam-Won ; Kim Sang-Hyun ;
Journal of Korea Water Resources Association, volume 39, issue 7, 2006, Pages 605~615
DOI : 10.3741/JKWRA.2006.39.7.605
In order to analyze movement of soil moisture, Time Domain Reflectometry(TDR) with multiplex system has been installed at the Bumreunsa hillslope of Sulmachun Watershed to configure spatial-temporal variation pattern considering seasonal characteristic. An intensive surveying was performed to build a refined digital elevation model(DEM) and flow determination algorithms with inverse surveying have been applied to establish an efficient soil moisture monitoring system. Soil moisture data were collected through an intensive and long term monitoring 380 hrs in November of 2003 and 1037 hrs in May and June of 2004. Soil moisture data shows corresponding variation characteristics of soil moisture on the up slope, buffer, main channel zones of the hillslope which were classified from terrain analysis. Measured soil moisture data were discussed in conjunction with flow characteristic through terrain analysis. Regardless season, immediate responses of soil moisture about rainfall looks similar but recession and recharge are primary characteristics of intermediate soil moisture variation for spring to summer and fall to winter season, respectively.
Evaluation of Agricultural Drought Prevention Ability Based on EOF Analysis and Multi-variate Time Series Model
Yoo Chul-Sang ; Kim Dae-Ha ; Kim Sang-Dan ;
Journal of Korea Water Resources Association, volume 39, issue 7, 2006, Pages 617~626
DOI : 10.3741/JKWRA.2006.39.7.617
In this study 3-month SPI data from 59 stations over the Korean peninsula are analyzed by deriving and spatially characterizing the EOFs. Also, the coefficient time series of EOF are applied to the multi-variate time series model to generate the time series of 10,000 years, to average them to estimate the areal average, and to decide the maximum drought severity for given return periods. Finally, the drought prevention ability is evaluated by considering the effective storage of dam within the basin and the size of agricultural area. Especially for the return period of 30 years, only the Han river basin has the potential to overcome the drought. Other river basins like the Youngsan river basin, which has a large portion of agricultural area but less water storage, are found to be very vulnerable to the rainfall-sensitive agricultural drought.
Estimation of Reservoir Discharge to Support TMDL Management in the Geum River Basin
Noh Joon-Woo ; Kim Soo-Jun ; Kim Jeong-Kon ; Koh Ick-Hwan ;
Journal of Korea Water Resources Association, volume 39, issue 7, 2006, Pages 627~636
DOI : 10.3741/JKWRA.2006.39.7.627
This study estimates adequate discharge to meet the specified target water quality concentration using the pollutant load of the Geum river basin given in TMDL (Total Maximum Daily Load) report. During the 1st phase, BOD is chosen as a target water quality constituent under regulation of the Ministry of Environment in Korea. BOD, TN, and TP loads estimated based on the TMDL and provincial zones were re-distributed for 10 major tributaries, and the remaining areas along the main river are classified as 15 incremental flow areas. Water quality modeling was conducted using Qual2E for the low flow period of a year (i.e.
). The results of the model simulation showed that about 30 cms from the Daechung dam would be sufficient to satisfy the target water quality in the Geum river downstream of the Daechung multipurpose Dam.