Publication Date:
2013-06-08
Description:
Submarine groundwater discharges (SGD) were investigated in a marine watershed in south-eastern Korea using water budget analysis and a 222 Rn mass balance model. Multi-layered TOPMODEL added hydrological assumption was used to estimate groundwater components in the water budget analysis. Field observations of soil moisture, rainfall, runoff and groundwater fluctuations were used for calibration and validation of the hydrologic model. Based on observed hydrological data and terrain analyses, parameters for the hydrologic model were delineated and used to describe several hydrologic responses in the watershed. SGD estimations by 222 Rn mass balance method were also performed at Il-Gwang bay in July, 2010, and May, June, July and Nov. 2011. The estimated groundwater through hydrologic modeling and water balance analysis was 1.3x10 6 m 3 /year, which rapidly increased during typhoon season due to heavy rainfall and permeable geologic structure. The estimated groundwater was approximately 3.7-27.1 % of SGD as evaluated by 222 Rn mass balance method ranges 3.44 and 17.45 m 3 m -2 year -1 . Even though SGD is predominantly influenced by tide fluctuation, the head gradient (difference) from hydrologic processes associated with heavy rainfalls can also extra significant influences. Comprehensive understanding of SGD evaluation can be improved through a simultaneous application of both these approaches. This article is protected by copyright. All rights reserved.
Print ISSN:
0885-6087
Electronic ISSN:
1099-1085
Topics:
Architecture, Civil Engineering, Surveying
,
Geography
