| Title: | Water age responses to weather conditions in a hyper-eutrophic channel reservoir in Southern China |
| Authors: | Du, W., Y. Li, L. Hua, C. Wang, P. Wang, J. Wang, Y. Wang, L. Chen, R.B. Buoh, M. Jepkirui, B. Pan, Y. Jiang and K. Acharya |
| Year: | 2016 |
| Journal: | Water |
| Volume (Issue): | 8(9) |
| Pages: | |
| Article ID: | 372 |
| DOI: | 10.3390/w8090372 |
| URL (non-DOI journals): | |
| Model: | SWAT |
| Broad Application Category: | hydrologic only |
| Primary Application Category: | model and/or data interface |
| Secondary Application Category: | hydrologic assessment |
| Watershed Description: | 225.4 km^2 Changtan Reservoir drainage area, located in Jiaoling County, Guangdong province in southern China |
| Calibration Summary: | |
| Validation Summary: | |
| General Comments: | |
| Abstract: | Channel reservoirs have the characteristics of both rivers and lakes, in which hydrodynamic conditions and the factors affecting the eutrophication process are complex and highly affected by weather conditions. Water age at any location in the reservoir is used as an indicator for describing the spatial and temporal variations of water exchange and nutrient transport. The hyper-eutrophic Changtan Reservoir (CTR) in Southern China was investigated. Three weather conditions including wet, normal, and dry years were considered for assessing the response of water age by using the coupled watershed model Soil Water Assessment Tool (SWAT) and the three-dimensional hydrodynamic model Environmental Fluid Hydrodynamic Code (EFDC). The results showed that the water age in CTR varied tremendously under different weather conditions. The averaged water ages at the downstream of CTR were 3 d, 60 d, and 110 d, respectively in the three typical wet, normal, and dry years. The highest water ages at the main tributary were >70 d, >100 d, and >200 d, respectively. The spatial distribution of water ages in the tributaries and the reservoir were mainly affected by precipitation. This paper provides useful information on water exchange and transport pathways in channel reservoir, which will be helpful in understanding nutrient dynamics for controlling algal blooms. |
| Language: | English |
| Keywords: | water age; weather conditions; EFDC; SWAT; channel reservoir |