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효과적인 오염총량관리를 위한 데스크탑 기반의 LDC 평가 시스템 개발
류지철,황하선,이성준,김은경,김용석,금동혁,임경재,정영훈,Ryu, Jichul,Hwang, Ha-Sun,Lee, Sung-Jun,Kim, Eun Kyoung,Kim, Yong Seok,Kum, Donghyuk,Lim, Kyoung Jae,Jung, Younghun 한국농공학회 2016 한국농공학회논문집 Vol.58 No.4
Load Duration Curve (LDC) can be used as a method for load management of point and non-point pollution source because the LDC easily assesses the water quality corresponding to hydrological changes in a watershed. Recently, the application of LDC to total pollution load management is a growing interest in Korea. In this regard, A desktop-based LDC assessment system was developed in this study to provide convenience to users in water quality evaluation. The developed system can simply produce the LDC by using streamflow and water quality data involved in its database. Also, The system can quantitatively inform the success or failure of the achievement for a target water quality at monthly scale. Furthermore, seasonal water quality and point/non-point pollution load in a watershed can be estimated by this system. We expect that the developed system will contribute to establish local and national policies regarding water management and total pollution load management because of its advantages such as the pollution tracking investigation and the analysis of water quality and pollution loading amount in an ungauged watershed.
황하선 ( Ha Sun Hwang ),이성준 ( Sung Jun Lee ),류지철 ( Jichul Ryu ),박지형 ( Ji Hyung Park ),김용석 ( Yong Seok Kim ),안기홍 ( Ki Hong Ahn ) 한국물환경학회(구 한국수질보전학회) 2016 한국물환경학회지 Vol.32 No.6
The purpose of Total Pollution Load Control at Tributary is to get the maximum improvement effect of the water quality through finding the most impaired section of water-body and establishing the proper control measure of pollutant load. This study was implemented to find the optimal management of reach, period, condition, watershed, and pollution source and to propose appropriate reduction practices using the Load duration curve (LDC) and field monitoring data. With the data of measurement, LDC analysis is shown that the most impaired condition is reach V (G4~G5), E group (flow exceedance percentile 90~100%) and winter season. For this reason, winter season and low flow condition should be preferentially considered to restore water quality. The result of pollution analysis for the priority reach and period is shown that agricultual nonpoint source loads from onion and garlic culture are most polluting one. Therefore, it is concluded that agricultural reuse of surface effluent (storm-water runoff with non-point sources) and low impact farming including reducing fertilization and controling the height of drainage outlet are efficient water quality management for this study watershed.
수질오염총량관리를 위한 유역모형의 유달 과정 재현방안 연구
황하선 ( Ha Sun Hwang ),이한필 ( Han Pil Rhee ),이성준 ( Sung Jun Lee ),안기홍 ( Ki Hong Ahn ),박지형 ( Ji Hyung Park ),김용석 ( Yong Seok Kim ) 한국물환경학회(구 한국수질보전학회) 2016 한국물환경학회지 Vol.32 No.6
Implemented since 2004, TPLC (Total Pollution Load Control), the most powerful water-quality protection program have been implemented since 2004. Recently, uncertainty of prediction using steady state model increased as changes of water environment, and necessity of dynamic state model, especially watershed model came to the fore on TPLC. For application of watershed model on TPLC, the adjustment of relationship (mass-balance) between discharged loads estimated by technical guidance and arrived loads based on observed data at the watershed outlet should be possible. However, HSPF perform simulation as semi-distributed model (lumped model) in a sub-basin. Therefore, if the estimated discharged loads from individual pollution source is entered into RCHRES module directly (without delivery ratio) as point source data, the pollutant load couldn`t be reduced properly in the RCHRES module until they reached the outlet of sub-basin. The hypothetic RCHRES that generated using HSPF BMP Reach Toolkit was applied to solve this problem, although it is not original usage of Reach Toolkit. And the impact of discharged load according to spatial distribution of pollution sources in a sub-basin could be expressed by multi-segmentation of hypothetic RCHRES. The discharged pollutant load through hypothetic RCHRES could be adjusted easily by modification of infiltration rate or characteristics of flow control devices.
수질오염총량 단위유역의 목표수질 달성여부 평가를 위한 부하지속곡선 적용성 연구
황하선 ( Ha Sun Hwang ),박배경 ( Bae Kyung Park ),김용석 ( Yong Seok Kim ),박기중 ( Ki Jung Park ),천세억 ( Se Uk Cheon ),이성준 ( Sung Jun Lee ) 한국물환경학회 2011 한국물환경학회지 Vol.27 No.6
The purpose of this study was evaluated on achievement of the Target water quality (TWQ) with Load Duration Curve (LDC) as well as materials collected through the implementation of Total Maximum Daily Load (TMDL), targeting 41 unit watersheds in the Nakdong River Basin in korea, and examines the adequacy of the LDC method to evaluate the TWQ by comparing methods through current regulations. It aims to provide basic materials for TMDL development in Korea. This determination resulted from the fact that the measured data placed on the LDC mean that they are beyond TWQ in a certain condition of water flow when actually measured load values were displayed in a form of LDC. In addition to water quality surveys, it is considered that information on the level of damage in a water body by water flow grade can be utilized as a basic material to identify compliance with the total admitted quantity, and establish rational plans to improve water quality. This information helps in the identification of the degree of damage in water quality according to water flow.
낙동강수계 3단계 광역시·도 경계지점 목표수질 설정 방법 연구
황하선 ( Ha Sun Hwang ),박지형 ( Ji Hyung Park ),김용석 ( Yong Seok Kim ),류덕희 ( Doug Hee Rhew ),최유진 ( Yu Jin Choi ),이성준 ( Sung Jun Lee ) 한국물환경학회(구 한국수질보전학회) 2017 한국물환경학회지 Vol.33 No.1
Total Pollution Load Control (TPLC) is a system for managing the discharge load assigned by satisfying the Water Quality (TWQ) in Standard Flow Conditions (SFC). TWQ between Metropolitan Cities/Dos Specified (Cities/Dos TWQ) is very important as the basis for each Unit Watershed TWQ. The purpose of this study was to establish a rational and scientific "Calculation Method for Cities/Dos TWQ." A methodology for the third-phase Cities/Dos TWQ was proposed in this study based on review of the past phases (first and second) Cities/Dos TWQ in the Nakdong river basin. The water-quality model was used to estimate the third-phase Cities/Dos TWQ. The allocation methods of individual discharge sources are important for estimating Cities/Dos TWQ In this case, the key point of the method of calculating the total allowable individual sources is the balance of the equity and the efficiency between individual sources of reduced pollutants. Thus, water quality should be determined for the current emission levels, the reduction capacity, and the technical possibilities of individual sources. We estimate the third-phase Cities/Dos TWQ according to the ` Calculation Method of Cities/Dos TWQ`.
유역모형을 이용한 유량조건별 배출계수 산정 및 활용방안 연구
황하선 ( Ha Sun Hwang ),이한필 ( Han Pil Rhee ),박지형 ( Jihyung Park ),김용석 ( Yong Seok Kim ),이성준 ( Sung Jun Lee ),안기홍 ( Ki Hong Ahn ) 한국물환경학회 2015 한국물환경학회지 Vol.31 No.6
TPLMS (Total water pollutant load management system) that is the most powerful water-quality protection program have been implemented since 2004. In the implementation of TPLMS, target water-quality and permissible discharged load from each unit watershed can be decided by water-quality modeling. And NPS (Non-point sources) discharge coefficients associated with certain (standard) flow are used on estimation of input data for model. National Institute of Environmental Research (NIER) recommend NPS discharge coefficients as 0.15 (Q275) and 0.50 (Q185) in common for whole watershed in Korea. But, uniform coefficient is difficult to reflect various NPS characteristics of individual watershed. Monthly NPS discharge coefficients were predicted and estimated using surface flow and water-quality from HSPF watershed model in this study. Those coefficients were plotted in flow duration curve of study area (Palger stream and Geumho C watershed) with monthly average flow. Linear regression analysis was performed about NPS discharge coefficients of BOD, T-N and T-P associated with flow, and R2 of regression were distributed in 0.893~0.930 (Palger stream) and 0.939~0.959 (Geumho C). NPS Discharge coefficient through regression can be estimated flexibly according to flow, and be considered characteristics of watershed with watershed model.