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수질오염총량 단위유역의 유량조건별 수체 손상 평가를 위한 부하지속곡선 적용성 연구
황하선 ( Ha Sun Hwang ),윤춘경 ( Chun Gyeong Yoon ),김지태 ( Ji Tae Kim ) 한국물환경학회 2010 한국물환경학회지 Vol.26 No.6
The purpose of this study was evaluated on the applicability of Load Duration Curve Method (LDC Method) using HSPF watershed model and sampling data for efficient TMDLs in Korea. The LDC Method was used for assessment pollutant characteristics in watershed and water quality variation in each water flow level. Load Duration Curve is applied for judge the level of impaired water-body and can be estimated the impaired level by pollutant, such as BOD, I-N, and T-P in this study depending on variation of stream flow. As a result, BOD, T-P was usually exceed the standard value at low flow and dry hydrologic period. Improvement of effluent concentration from WWTP and riparian buffer protection zone are effective to improve the water quality. T-N showed the worst condition at mid-range hydrologic period and moist hydrologic period. Therefore, soil erosion control program and BMPs for non-point source pollution control is effective for recovery the water quality, which can be useful method for management of water quality in the plan of recovery water quality spontaneously. Applicability of LDC Method was evaluated in the Nakbon A watershed. However, we need to consider more detailed and accumulated data set such as accurate G1S data and detail pollution data, and WWTP discharge water quality data for accurate evaluation of watershed. Overall, The LDC Method is adequate for evaluation of watersheds characteristics, and its application is recommended for watershed management and TMDL Implementation.
수도재배에서 유입수의 농도와 시비량의 변화에 의한 질소, 인의 Mass Balance
황하선 ( Hwang Ha Sun ),윤춘경 ( Yoon Chun Gyeng ) 한국농공학회 2000 한국농공학회 학술대회초록집 Vol.2000 No.-
This study were conducted to evaluate the mass balance of phosphorus and nitrogen with cropping in experimental pot where the mass of input concentration, and fertilization were variable. Four treatments include CSWNF, TWCF, SWNF. And these cases were compared to the control case of tap water irrigation with conventional fertilization (CONTROL). Fertilization were following conventional fertilization , N : P : K = 11kg : 7kg : 8kg. Input water loading was CSWNF (N:48.7g ,P:3.6g), TWCF(7.8g, 0.6g), SWHF(38.8g ,2.9g), TWNF(38.8g, 2.9g ) and CONTROL(0g ,0g ) The result is nitrogen decrease rate; TWCF(19.2%), SWHF(14.9%), CSWNF(9.2%) and SWCF(5.6%). phosphorous decrease rate ; TWCF (10%), SWHF(3.7%), SWCF(0.9%) and CSWNF(0.3%).
총량관리 단위유역 일평균유량의 시계열 누적 변화에 따른 유량지속곡선 차이 분석
황하선 ( Hwang Ha-sun ),이한필 ( Rhee Han-pil ),서지연 ( Seo Ji-yeon ),최유진 ( Choi Yu-jin ),박지형 ( Park Ji- Hyung ),신동석 ( Shin Dong-seok ),이성준 ( Lee Sung-jun ) 한국농공학회 2018 한국농공학회논문집 Vol.60 No.6
The LDC (Load Duration Curve) method can analyze river water quality changes according to flow rate and seasonal conditions. It is also possible to visually recognize whether the target water quality is exceeded or the size of the reduction load. For this reason, it is used for the optimal reduction of TPLCs and analysis of the cause of water pollution. At this time, the flow duration curve should be representative of the water body hydrologic curve, but if not, the uncertainty of the interpretation becomes big because the damaged flow condition is changed. The purpose of this study is to estimate the daily mean flow of the unit watershed using the HSPF model and to analyze the difference of the flow duration curves according to the cumulative daily mean flow rate using the NSE technique. The results show that it is desirable to construct the flow duration curve by using the daily average flow rate of at least 5 years although there is a difference by unit watershed. However, this is the result of the water bodies at the end of Han River basin watershed, so further study on various water bodies will be necessary in the future.
황하선 ( Ha Sun Hwang ),공동수 ( Dong Soo Kong ),신동석 ( Dong Suk Shin ),전지홍 ( Ji Hong Jeon ) 한국물환경학회 2004 한국물환경학회지 Vol.20 No.6
Field experimental study was performed to examine characteristics of nutrient export from paddy rice fields with irrigation practices. Experimental fields with surface-water and ground-water irrigation were monitored and analyzed during rice culture period. The water balance showed that outflow generally balanced the inflow showing that about half (58∼68%) of total outflow was lost by surface drainage. Water and nutrient export are more in surface-water irrigation paddy than in ground-water irrigation paddy. The reasons might be more irrigation water available and easy to use in surface-water irrigation. If irrigation water reduced, it could result in reduction of nutrient export in paddy rice fields, which can save water and protect water quality. However, deviation from conventional standard practices might affect the rice yield and further investigations are necessary.
지하수관개지역에서의 수도재배기간중 시비량의 변화에 따른 영양물질 수지 분석
황하선 ( Hwang Ha Sun ),윤춘경 ( Yoon Chun Gyeng ) 한국농공학회 2001 한국농공학회 학술대회초록집 Vol.2001 No.-
This study was performed to examine water and nutrient balance during rice cropping period using difference fertilization paddy plot in ground water irrigation region. The experimental rice paddy consist of three plot, Treatment of Excess Fertilization(TEF) and Treatment of Standard Fertilization(TSF) and Treatment of Reduce Fertilization(TRF). As result, input amount to rice paddy was almost rainfall and output was direct runoff through drainage. nutrient input amount was upper paddy in case COD and fertilization in case Total nitrogen and total phosphorus, and output was drainage in all nutrient.
황하선 ( Hwang Ha Sun ),윤춘경 ( Yoon Chun Gyeng ) 한국농공학회 2002 한국농공학회 학술대회초록집 Vol.2002 No.-
Development and application of nonpoint pollutant source model need pertinent runoff simulation for expecting good simulation result of yield of nonpont pollutant and it's move. this study purpose was compare to runoff height among Observed of Regression, HSPF and SWAT in hukchun basis loacated Gyeonggi province yangpeong-gun in two years(1998~1999). Result, runoff height were Regression, SWAT, HSPF is 2578.96, 2526.44, 2547.21mm respectively, Nash-Schutcliff' simulation efficiency, compare to observed, was 70.22, 73.71% respectively so two simulation run off height was pertinent. If Regression method use excess observed arrange, it include error. so it's importance using pertinent arrange of observed runoff height.
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 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`.