제주도 남부 주요 기저유출 유역의 수자원해석

Abstract

Unlike most rivers in Jeju Province that become dry because of geological characteristic with excellent water permeability, Central Seogui River area always maintains flow of spring water, which results from base runoff nearby the coast. Base runoff of Akgeun-cheon and Gangjeong-cheon, major base runoff regions of Central Seogui, was computed using distribution SWAT model in order to establish methods for management and use of surface water. As input data for SWAT model, hydrologic and weather data such as maximum and minimum temperatures, solar radiation, wind velocity, humidity, and precipitation were constructed with DEM (Digital Elevation Model) and soil type map. After simulation, correction of results was conducted after sensitivity analysis on 27 parameters using 20 observations between July 2011 and April 2012. As a result of simulation with SWAT model, excellent results were shown on base runoff in general. However, better results can be deduced by conducting studies with more runoff data, continuous water level data, and precipitation data with consideration on errors in some water level data and lack of observation data in this study.