Relationship between hydrological drought and water quality in the Han River Basin, Korea
Abstract
Water quality is a function of several factors including landscape characteristics and instream hydrological processes. In this work, we examine the relationship between hydrological drought and water quality and explore the strength of those relationship using other watershed attributes. We use streamflow volume of selected stations in the basin to derive standardized streamflow index in order to identify drought months using daily data aggregated for each month in the past 20 years. The water quality data include monthly concentration values of chemical oxygen demand, total nitrogen, total phosphorus, and total suspended solids. We also use landuse, topography, and population data in order to examine their role in determining strength of the relationships between water quality and hydrological drought. Our preliminary result shows that the chemical oxygen demand is susceptible to hydrological drought as its concentration increases after prolonged drought while other parameters didn't show any significant relationships. We expect these relationships vary according to landuse, topography, size of the watershed, and extent of human impact. This work expects to assist policymakers in implementing water quality improvement measures in drought-prone regions.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2019
- Bibcode:
- 2019AGUFM.H42G..03M
- Keywords:
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- 1848 Monitoring networks;
- HYDROLOGY;
- 1871 Surface water quality;
- HYDROLOGY;
- 1879 Watershed;
- HYDROLOGY;
- 1880 Water management;
- HYDROLOGY