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Waste Load Allocation for a Macrophyte Growing Impoundment: a Combined Modeling Approach
Park,Seok Soon,Uchrin,Christopher G. 이화여자대학교 환경문제연구소 1997 이화환경연구 Vol.1 No.-
A waste load allocation study was peformed for the Matchaponix Brook-Duhernal Lake system, where both free flowing and impounded reaches exist. In an impounded area, macrophytes can play an important role affecting water quality wheras no discernible effects are usually in free flowing reaches. Due to the nature of the study system, two models were combined to assess the probable impact on receiving water quality caused by an upstream treated wastewater discharge. The collected water quality and flow data were used to determined the critical ambient conditions. The study demonstrated how the macrophytes growing in the downstream impounded area respond to the upstream waste loads.
A stoichiometric model for water quality interactions in macrophyte dominated water bodies
Park,Seok Soon,Uchrin,Christopher G. 이화여자대학교 환경문제연구소 1997 이화환경연구 Vol.1 No.-
A computer model, SIREMI, which imcorporates water quality interactions of aquatic plants including planktonic algae, periphyton, and macrophytes is persented in this paper. In this model, the total amount of aquatic plants is represented dynamically as an oxygen equivalent, dependent upon available solar radiation. Through the stoichiometric relationship between plant protoplasm and processes including photosynthesis, respiration, and death, nutrients and autochthonous organic matter are computed based on simulated oxygen equivalents. The model was applied to an impounded stream where macrophytes played an important role in water quality dynamics. There was good comparison between model prediction and actual observations. The results indicate that the time variable oxygen equivalent concept for aquatic plants could be a useful approach for simulating the function of aquatic plants in diurnal dissolved oxygen variations, nutrient uptake/recycle, and the generation of autochthonous organic matter.
WATER QUALITY MODELING OF THE LOWER SOUTH BRANCH OF THE RARITAN RIVER, NEW JERSEY
SEOK S. PARK,CHRISTOPHER G. UCHRIN 江原大學校 附設 環境硏究所 1990 環境硏究 Vol.7 No.-
A comprehensive water quality model was con-siructed for Lower South Branch of the Raritan River, using the USEPA Enhanced Stream Quality Model (QUAL2E). Field data were obtained from two synoplic field sampling surveys performed during summer warm weather, low flow conditions (August and September 1987) for three consecutive days. The model was calibrated to the August survey data and verified to the September survey data. Minimum dissolved oxygen(DO) levels were simulated through the adjustment of medel formulation to the macrophyte domi-nant stream. A major limitation of the QUAL2E model is that macrophyte activities are not included in the DO dynamics. This limitation can be quite significant in applications to streams where macrophytes dominate. To overcome this limitation, an expedient method was developed for this study. This method did not involve alteration of the basic model for-mulation. The model results displayed good agreement with the field measurements for both surveys.
SEOK S. PARK,CHRISTOPHER G. UCHRIN 江原大學校 附設 環境硏究所 1990 環境硏究 Vol.7 No.-
Park, S.S. and Uchrin, C.G., 1998. A numerical mixing zone model for water quality assessment in natural streams:conceptual development. Ecol.Modelling, 42:233-244. A mixing zone is an area of a water body contiguous to wastewater disposal site in which the water quality does not comply with the water quality standards. The zone has been considered as one of the water quality characteristics for the protection of indigenous aquatic biota and regulated by the in-zone quality and the volumetric configuration. This paper presents the conceptual development of a numerical model which can predict the in-zone quality and volumetric configuration in natural streams. The model is based on the trans-formed advection-dispersion equation where transverse distance is replaced by dimensionless cumulative discharge.
미국 뉴저지주 매차포닉강의 수질 모델 연구 : QUAL2E 모델 적용
박석순,크리스토퍼 유클린 ( Seok Soon Park,Christopher G. Uchrin ) 한국하천호수학회 1990 생태와 환경 Vol.23 No.2
A comprehensive water quality model was constructed for the Matchaponix Brook, New Jersey, U.S.A., using the USEPA Enhanced Stream Quality Model (QUAL2E). The study area (15.3 km) was divided into eight (8) reaches. Each reach was then subdivided into uniform computational elements of 160.9 m. Field Data were obtained from two synoptic field sampling surveys performed during summer warm weather, low flow (September, 1989) and winter cold weather, low flow (November, 1989) conditions for three consecutive days. The model was calibrated to the September survey data and verified to the November survey data. The modeled water quality parameters included Dissolved Oxygen (DO), 5-day Biochemical Oxygen Demand (BOD_5), Total Suspended Solids (TSS), Total Dissolved Solids (TDS), Organic Nitrogen (Org-N), Ammonia Nitrogen (NH₃-N), Nitrite Nitrogen (NO₂-N), Nitrate Nitrogen (NO₃-N), Total Organic Phosphorus (TOP), Total Dissolved Phosphorus (TDP), and Planktonic Algae as Chlorophyll-A (Chl-A) but selected parameters were displayed in this paper. The results displayed good agreement with the field measurements for both surveys in steady-state simulations.