行政院國家科學委員會補助專題研究計畫成果報告:水庫供水機能檢討評估與改善對策─以石門水庫為例─總計畫：水庫供水機能檢討評估與改善對策─以石門水庫為例
Date Issued
2005
Date
2005
Author(s)
許銘熙
DOI
932625Z002042
Abstract
The Shihmen Reservoir is built in the middle part of Da-Han River, a
tributary of the Tam-Shiu River, for multiple functions, such as irrigation,
flood mitigation, hydropower, and water supply. The reservoir was
established in 1964 with the designed storage volume of 240 million m3. The
rapid development in the Taoyuan County and its surrounding areas, which
depend on the water supply from the Shihmen Reservoir, has increased the
annual water demand to 900 million m3 due to the rapid development and
urbanijation. However, the heavy rainfalls accompany with typhoons usually
induce landslides and soil-erosion in the upstream catchments and decrese the
reservoir’s capacity.
The Typhoon Aere in August 2004 brought more than 1,600 mm of
precipitation in upstream catchments and caused servere damage to the
reservoir. More than 20 million m3 of sediments was estimated that flushed
into the reservoir during the event. The turbidity of source water was too high
to fulfill the minimum requirement of treatment for water supply. The
waterworks were forced to be shutdown for three weeks and almost 2 million
people suffered the unexpectable water shortage. Several emergency
measures had been conducted by the Government to resume the water supply.
The National Science Council of the Executive Yuan would like to offer
scientific evaluations for improving the water supply function of the Shihmen
Reservoir. A joint research group was teamed up by professors from
universities and professionals from research institutes. The factors related to
the water supply risk of the Shihmen Reservoir are analyzed, including the
uncertainty in hydrology, the demand of water supply, the settling behavior of
cohesive mud, the deposition and scour situations of the downstream channels,
the capabilities of water treatment plants, regional water supply and storage,
and the inter-regional management and support, and the treatment technique
for the raw water with high turbidity. The provided suggestions will help the
authorities to set long-term strategies for enhancing the water supply function
of the Shihmen Reservoir.
Publisher
臺北市：國立臺灣大學生物環境系統工程學系暨研究所
Type
report
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