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http://dx.doi.org/10.17820/eri.2022.9.1.001

Applicability Analysis of the HSPF Model for the Management of Total Pollution Load Control at Tributaries  

Song, Chul Min (Department of Policy for Watershed Management, The Policy Council for Paldang Watershed)
Kim, Jung Soo (Department of Civil Engineering, Buchoen University)
Lee, Min Sung (Corporate R&D Center, C&I Tech)
Kim, Seo Jun (Corp. HydroSEM)
Shin, Hyung Seob (Corp. ERI)
Publication Information
Ecology and Resilient Infrastructure / v.9, no.1, 2022 , pp. 1-14 More about this Journal
Abstract
The total maximum daily load (TMDL) implemented in Korea mainly manages the mainstream considering a single common pollutant and river discharge, and the river system is divided into unit watersheds. Changes in the water quality of managed rivers owing to the water quality management in tributaries and unit watersheds are not considered when implementing the TMDL. In addition, it is difficult to consider the difference in the load of pollutants generated in the tributary depending on the conditions of the water quality change in each unit watershed, even if the target water quality was maintained in the managed water system. Therefore, it is necessary to introduce the total maximum load management at tributaries to manage the pollution load of tributaries with a high degree of pollution. In this study, the HSPF model, a watershed runoff model, was applied to the target areas consisting of 53 sub-watersheds to analyze the effect of water quality changes the in tributaries on the mainstream. Sub-watersheds were selected from the three major areas of the Paldang water system, including the drainage basins of the downstream of the South Han-River, Gyeongan stream, and North Han-River. As a result, BOD ranged from 0.17 mg/L to 4.30 mg/L, and was generally high in tributaries and decreased in the downstream watershed. TP ranged from 0.02 mg/L - 0.22 mg/L, and the watersheds that had a large impact on urbanization and livestock industry were high, and the North Han-River basin was generally low. In addition, a pollution source reduction scenario was selected to analyze the change in water quality by the amount of pollution load discharged at each unit watershed. The reduction rate of BOD and TP according to the scenario changes was simulated higher in the watershed of the downstream of the North Han-River and downstream and midstream of the Gyeongan stream. It was found that the benefits of water quality reduction from each sub-watershed efforts to improve water quality are greatest in the middle and downstream of each main stream, and it is judged that it can be served as basic data for the management of total tributaries.
Keywords
HSPF model; Paldang water system; TMDL; Total pollution load control at tributary;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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