TY - GEN
T1 - Examining the flow regime alteration and its potential impacts to freshwater ecosystems under changing climate conditions
AU - Suen, Jian-Ping
PY - 2009/10/26
Y1 - 2009/10/26
N2 - This paper uses observed daily streamflow data to examine the flow regime alteration and how these changes might potentially affect freshwater ecosystems. The earth surface temperature has been observed gradually increase and associate with precipitation and atmospheric moisture changes over space and time. Climate induced flow regime changes are examined by Indicators of Hydrologic Alteration approach. The annual extreme water conditions (1-, 3-, 7-, 30-, 90- day annual minima or maxima) reveal larger alteration from analyzing twenty-three gauging stations throughout Taiwan. More severe flood and drought events happen in the period of after 1991 than the period of 1961-1990. Frequency and duration of the flood and drought events also reveal high fluctuation. Flow regime is being altered and is going to continue into the foreseeable future. The aquatic organisms not only need to defend themselves from the anthropogenic damage to the river system but also are facing the on-going threat from thermal and flow regime altering under changing climate. This paper tries to raise this issue to allow water resources managers taking some precautionary measures to reduce the cumulative effects from anthropogenic influence and changing climate.
AB - This paper uses observed daily streamflow data to examine the flow regime alteration and how these changes might potentially affect freshwater ecosystems. The earth surface temperature has been observed gradually increase and associate with precipitation and atmospheric moisture changes over space and time. Climate induced flow regime changes are examined by Indicators of Hydrologic Alteration approach. The annual extreme water conditions (1-, 3-, 7-, 30-, 90- day annual minima or maxima) reveal larger alteration from analyzing twenty-three gauging stations throughout Taiwan. More severe flood and drought events happen in the period of after 1991 than the period of 1961-1990. Frequency and duration of the flood and drought events also reveal high fluctuation. Flow regime is being altered and is going to continue into the foreseeable future. The aquatic organisms not only need to defend themselves from the anthropogenic damage to the river system but also are facing the on-going threat from thermal and flow regime altering under changing climate. This paper tries to raise this issue to allow water resources managers taking some precautionary measures to reduce the cumulative effects from anthropogenic influence and changing climate.
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U2 - 10.1061/41036(342)491
DO - 10.1061/41036(342)491
M3 - Conference contribution
AN - SCOPUS:70350156865
SN - 9780784410363
T3 - Proceedings of World Environmental and Water Resources Congress 2009 - World Environmental and Water Resources Congress 2009: Great Rivers
SP - 4864
EP - 4874
BT - Proceedings of World Environmental and Water Resources Congress 2009 - World Environmental and Water Resources Congress 2009
T2 - World Environmental and Water Resources Congress 2009: Great Rivers
Y2 - 17 May 2009 through 21 May 2009
ER -