| Title |
Methodology for the Identification of Impaired Waters Using LDC for the Management of Total Maximum Daily Loads |
| Authors |
박준대 ( Jun Dae Park ) ; 오승영 ( Seung Young Oh ) |
| Keywords |
Load Duration Curve; LDC; Stream flow conditions; Total Maximum Daily Loads (TMDLs); Water quality characteristics; Water quality goal attainment |
| Abstract |
Load Duration Curve(LDC) is a useful tool for analyzing water quality characteristics under various stream flow conditions. This study investigated the methods to identify impaired waterbodies in the assessment of water quality goal attainment by using LDC for the management of Total Maximum Daily Loads (TMDLs). Three methods were proposed. Non-typical regime exclusion method is a method to exclude water quality observations in the non-typical extreme flow conditions in order to minimize the influence of non-ordinary water quality. Flow regime weighted average method is a method to calculate weighted mean water quality instead of arithmetic mean in order to consider water characteristics properly on stream flow regime in addition to the effect of Non-typical regime exclusion method. Load exceeded interval comparison method is a method to compare the intervals between the attained and non-attained load duration periods on the LDC. The assessment of water quality goal attainment can be performed more reasonably and precisely considering water quality variations on stream flow conditions by applying these proposed methods. |