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High-resolution water temperature observation of typical structures in the Middle
Route of South-to-North Water Diversion Project
1
2
1
1
FU Hui ，GUO Xinlei ，PAN Jiajia ，TUO Youcai ，XU Henghui 3
（1. State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin，China Institute of Water Resources
and Hydropower Research，Beijing 100038，China；2. Sichuan University，Chengdu 610065，China；
3. Hefei University of Technology，Hefei 230009，China）
Abstract：The Middle Route of South-to-North Water Diversion Project spans eight latitudes and transports water
from south to north. The significant differences of the latitude，the meteorological conditions of freezing and thawing，
and the complex composition of canal structures leads to complex water diversion processes，such as open flow，ice
flow and ice covered flow in winter.In order to ensure the safe operation，the flow discharge of the Middle Route Proj⁃
ect is only 31%−47% of the design flow in winter，which seriously limits the benefit of the project. The water tempera⁃
ture controls ice processes. Therefore，clarifying the temperature loss characteristics of the Middle Route of South-to-
North Water Diversion Project is important to improve the water delivery capacity in winter. The Middle Route of
South-to-North Water Diversion Project is composed of inverted siphon，aqueduct，open channel，tunnel and other
canal structures. Due to the influence of boundary conditions，the temperature loss characteristics are significantly
different. Especially，some canal structures are notably short in length，and the high precision measurement of water
temperature is required. So the water temperature loss characteristics of each canal structure are unclear. The proto⁃
type measurement was carried out from Beijing to Shijiazhuang Section with high risk of ice jam. The temperature loss
of four types of canal structures，including inverted siphon，aqueduct，open channel and tunnel，was measured. The
temperature loss rate of different canal structures was compared and analyzed. The research results can improve the
accuracy of water temperature prediction models for the South to North Water Diversion Project or similar water trans⁃
fer projects.
Keywords：the Middle Route of the South-to-North Water Diversion Project；water temperature；open channel；
inverted siphon；aqueduct；tunnel
（责任编辑：韩 昆）
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