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Development of Long Term Flow Duration Curves in 4 River Basins for the Management of Total Maximum Daily Loads  

Park, Jun Dae (Water Pollution Load Management Research Division, Water Environment Research Department, National Institute of Environmental Research)
Oh, Seung Young (Water Pollution Load Management Research Division, Water Environment Research Department, National Institute of Environmental Research)
Publication Information
Journal of Korean Society on Water Environment / v.29, no.3, 2013 , pp. 343-353 More about this Journal
Abstract
Flow duration curve (FDC) can be developed by linking the daily flow data of stream flow monitoring network to 8-day interval flow data of the unit watersheds for the management of Total Maximum Daily Loads. This study investigated the applicable method for the development of long term FDC with the selection of the stream flow reference sites, and suggested the development of the FDC in 4 river basins. Out of 142 unit watersheds in 4 river basins, 107 unit watersheds were shown to estimate daily flow data for the unit watersheds from 2006 to 2010. Short term FDC could be developed in 64 unit watersheds (45%) and long term FDC in 43 unit watersheds (30%), while other 35 unit watersheds (25%) were revealed to have difficulties in the development of FDC itself. Limits in the development of the long term FDC includes no stream monitoring sites in certain unit watersheds, short duration of stream flow data set and missing data by abnormal water level measurements on the stream flow monitoring sites. To improve these limits, it is necessary to install new monitoring sites in the required areas, to keep up continuous monitoring and make normal water level observations on the stream flow monitoring sites, and to build up a special management system to enhance data reliability. The development of long term FDC for the unit watersheds can be established appropriately with the normal and durable measurement on the selected reference sites in the stream flow monitoring network.
Keywords
Long term flow duration curve; Stream flow monitoring network; Stream flow reference sites; Total Maximum Daily Loads; Unit watersheds;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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