Effects of land cover changes induced by large physical disturbances on hydrological responses in Central Taiwan
Resource
Environmental Monitoring and Assessment, In Press
Journal
Environmental Monitoring and Assessment
Journal Volume
166
Journal Issue
1-4
Pages
503-520
Date Issued
2010
Author(s)
Abstract
This study analyzes the significant impacts of typhoons and earthquakes on land cover change and hydrological response. The occurrence of landslides following typhoons and earthquakes is a major indicator of natural disturbance. The hydrological response of the Chenyulan watershed to land use change was assessed from 1996 to 2005. Land use changes revealed by seven remote images corresponded to typhoons and a catastrophic earthquake in central Taiwan. Hydrological response is discussed as the change in quantities and statistical distributions of hydrological components. The land cover change results indicate that the proportion of landslide relative to total area increased to 6.1% after the Chi-Chi earthquake, representing the largest increase during the study period. The study watershed is dominated by forest land cover. Comparisons of hydrological components reveal that the disturbance significantly affects base flow and direct runoff. The hydrological modeling results demonstrate that the change in forest area correlates with the variation of base flow and direct runoff. Base flow and direct runoff are sensitive to land use in discussions of distinction. The proposed approach quantifies the effect of typhoons and earthquakes on land cover changes. © 2009 Springer Science+Business Media B.V.
Subjects
Distinction; Disturbances; Hydrology; Land cover change; Landslides; Monte Carlo simulations; Remote sensing data
SDGs
Other Subjects
Baseflows; Catastrophic earthquake; ChiChi earthquake; Disturbances; Forest area; Forest land; Hydrological modeling; Hydrological response; Land-cover change; Land-use change; Monte Carlo Simulation; Natural disturbance; Physical disturbance; Remote sensing data; Significant impacts; Statistical distribution; Aerodynamics; Computer simulation; Earthquakes; Groundwater flow; Hurricanes; Land use; Landslides; Monte Carlo methods; Remote sensing; Runoff; Water; Watersheds; Landforms; baseflow; Chi-Chi earthquake 1999; computer simulation; environmental disturbance; environmental impact; geostatistics; hydrological modeling; hydrological response; land cover; land use change; landslide; Monte Carlo analysis; remote sensing; runoff; typhoon; watershed; article; controlled study; earthquake; forest soil; hurricane; hydrology; land use; landslide; Monte Carlo method; remote sensing; Taiwan; watershed management; Cyclonic Storms; Earthquakes; Environmental Monitoring; Landslides; Monte Carlo Method; Taiwan; Trees; Water Pollutants; Water Pollution; Water Supply; Taiwan
Type
journal article
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