A Study on the Spatial Strength and Cluster Analysis at the Unit Watershed for the Management of Total Maximum Daily Loads

Abstract

The characteristic of the water quality and pollutant discharge was analyzed at the units watershed of the total amount management in Han-river basin, and after classified in a similar area by multivariate statistical analysis, the main trend such as the water quality trend and pollutant discharge characteristic were analyzed. As a result of this study, the density of the pollutant at the unit watershed is not necessarily identified as discharge density, and the primary management watershed and targeted substances were analyzed depending on the operating status of the environmental infrastructure in watershed and the main pollution factor and discharge path per pollutants. As a result of cluster analysis, watersheds were classified into four groups according to discharge characteristics. It will be used when selecting target area of primary management that is appropriate to the characteristics of each river and establishing efficient water quality improvement plans.

Assessment of Spatiotemporal Variations in the Water Quality of the Han River Basin, South Korea, Using Multivariate Statistical and APCS-MLR Modeling Techniques

“…S-14 exhibited higher concentrations of EC (1109 µS cm −1 ), COD (6.7 mg L −1 ), and TSS (84.6 mg L −1 ) than the other sites (Figure S1). This was because of the influence of the industrial wastewater generated from large industrial complexes (leather and dyeing factories) located in the HRB and the hydraulic characteristics caused by the tides at the Han River estuary [52,53]. S-12 showed high concentrations of TOC (3.4 mg L −1 ) and TP (0.138 mg L −1 ) possibly due to the high population density of the closely located large cities; additionally, the introduction of the Tan Stream and Anyang Stream, which are already affected by the effluents from public sewage treatment facilities, could have influenced the water quality [52].…”

“…Cluster 2 was composed of the main sites (S-8, S-9, and S-7) of the North Han River, and exhibited clean water quality characteristics due to the high proportion of forests and the effluent from dams (Soyanggang, Uiam, and Cheongpyeong dams). Cluster 3 included only the main site of the Imjin River (S-14), and exhibited high water quality characteristics under the hydraulic influence caused by the tidal action at the Han River estuary and the significant impact of the industrial wastewater discharged from large industrial complexes (Dongducheon city and Yangju city; 229 textile factories and 48 leather factories) [30,52,53]. The sites in the same groups had similar natural backgrounds and features that may be affected by similar pollution sources.…”

Evaluation for Pollution Characteristics of Sincheon River and its Tributaries South Korea

“…The main reason of pollution of Suk-Woo was untreated wastewater, and it influenced downstream of SW. HC stream satisfied the water quality standard [4] [5], but Zn was designated as a monitoring contaminants, was high at 14.67 mg/L (standard 0.02~2.45mg/L)because of textile wastewater. SP stream was polluted by livestock wastewater of as nonpoint source.…”

“…The results were as followed that the inflow of HC, SW and SP induced the increasing the pollution degree of BOD and T-N level for Sincheon river. Pollution degree of tributaries were higher than main stream of Sincheon [3].The main reason of pollution of Suk-Woo was untreated wastewater, and it influenced downstream of SW. HC stream satisfied the water quality standard [4] [5], but Zn was designated as a monitoring contaminants, was high at 14.67 mg/L (standard 0.02~2.45mg/L)because of textile wastewater. SP stream was polluted by livestock wastewater of as nonpoint source.…”

A Study on the Final Evaluation Criteria of Allocation Exceedance Regional in Total Maximum Daily Load

“…jpark01@korea.kr This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/ licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. 낙동강, 금강, 영산강･섬진강 수계(이하 '3대강수계'라 한 다)에서 1단계 최종년도(2010년) 이후 단계평가를 수행하였 다 (NIER, 2011a(NIER, , 2011b(NIER, , 2011c (Kim et al, 2016 (Choi et al, 2015;Park et al, 2012), 할당부하량 산정방법 및 초과 현황 분석 (Kim et al, 2014;Park et al, 2013) a) The numbers in parentheses are estimated according to each region when the local government area is divided into two or more unit watersheds.…”