| Title |
Seasonal Variations of Stream Water Temperature and its Affecting Factors on Mountain Areas |
| Authors |
남수연 ( Sooyoun Nam ) ; 최형태 ( Hyung Tae Choi ) ; 임홍근 ( Honggeun Lim ) |
| DOI |
https://doi.org/10.15681/KSWE.2019.35.4.308 |
| Keywords |
Air temperature falling period; Air temperature rising period; Mountain stream water; Regression equation |
| Abstract |
The objective of this study was to investigate mountain stream water and air temperatures, area, latitude, altitude, and forest coverage in headwater catchments located in Kangwon-do, Mid-eastern Korea from 2015 to 2017. Daily mean value of mountain stream water temperature was approximately 6 ℃ lower than the daily mean value of air temperature on the monitoring sites during the observation period. Monthly mean value of mountain stream water temperature increased with increasing monthly mean value of air temperature from May to August during the observation period. Seasonal variations of mountain stream water temperature were dependent on air temperature rising and falling periods. Correlation analysis was conducted on mountain stream water temperature to investigate its relationship with air temperature, area, latitude, altitude, and forest coverage of air temperature rising and falling periods. The correlation analysis showed that there exists a relationship (Correlation coefficient: -0.581 ∼ 0.825; p<0.05), particularly the air temperature showed highest correlation with mountain stream water temperature. Regression equations could be developed due to contribution of air temperature to affect mountain stream water temperature (Correlation coefficient: 0.742 and 0.825; p<0.01). Therefore, a method using various parameters based on air temperature rising and falling periods, could be recommended for predicting mountain stream water temperature. |