Exploring the spatio-temporal interrelation between groundwater and surface water by using the self-organizing maps
學年 106
學期 1
出版（發表）日期 2018-01-01
作品名稱 Exploring the spatio-temporal interrelation between groundwater and surface water by using the self-organizing maps
作品名稱（其他語言）
著者 I-Ting Chen; Li-Chiu Chang; Fi-John Chang
單位
出版者
著錄名稱、卷期、頁數 Journal of Hydrology 556, p.131-142
摘要 In this study, we propose a soft-computing methodology to visibly explore the spatio-temporal groundwater variations of the Kuoping River basin in southern Taiwan. The self-organizing map (SOM) is implemented to investigate the interactive mechanism between surface water and groundwater over the river basin based on large high-dimensional data sets coupled with their occurrence times. We find that extracting the occurrence time from each 30-day moving average data set in the clustered neurons of the SOM is a crucial step to learn the spatio-temporal interaction between surface water and groundwater. We design 2-D Topological Bubble Map to summarize all the groundwater values of four aquifers in a neuron, which can visibly explore the major features of the groundwater in the vertical direction. The constructed SOM topological maps nicely display that: (1) the groundwater movement, in general, extends from the eastern area to the western, where groundwater in the eastern area can be easily recharged from precipitation in wet seasons and discharged into streams during dry seasons due to the high permeability in this area; (2) the water movements in the four aquifers of the study area are quite different, and the seasonal variations of groundwater in the second and third aquifers are larger than those of the others; and (3) the spatial distribution and seasonal variations of groundwater and surface water are comprehensively linked together over the constructed maps to present groundwater characteristics and the interrelation between groundwater and surface water. The proposed modeling methodology not only can classify the large complex high-dimensional data sets into visible topological maps to effectively facilitate the quantitative status of regional groundwater resources but can also provide useful elaboration for future groundwater management.
關鍵字 Self-organizing map (SOM);Regional groundwater;Visually display;Spatio-temporal distribution;Soft-computing method
語言 en
ISSN 0022-1694
期刊性質 國外
收錄於 SCI EI
產學合作 國內
通訊作者
審稿制度 是
國別 NLD
公開徵稿
出版型式 ,電子版,紙本
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