What is the historical record of diverting water from the Yellow River to Tianjin since 2003? Has the water source in Tianjin been switched? How many times? Time? Thank you very much.

Since 1972, when Zhang Caiyuan sluice first transferred water to Tianjin, it has transferred water to Tianjin 10 times, totaling 939 days. * * * The Yellow River has a water volume of 5,899.7 million cubic meters, of which Tianjin receives 36. 1 100 million cubic meters. See the details in the figure below.

Table of water transfer in previous YRDP period

Time Start Time End Time Water Diversion Days Discharge at Head of Canal Comments on Water Intake in Tianjin

11972.12.251973.2.1553 Caiyuanmen 1.6 14 1.03.

21973.5.31973.6.22 50 Caiyuanmen 1.248 1.08

31975.10.181976.1.3105 Zhangcaiyuan sluice has a flow of 238.437 million cubic meters.

41981.10.151982.1.1594 caiyuanmen, Weishanmen and panzhuang men1.

51982.1.11983.1.364-bit mountain gate.

Panzhuang Gate 5.09 6.02 Yuecheng Reservoir synchronously supplies water.

6 2000.10.13 2006.5438+0.2.2112 Shanmen 8.66 4.0 1

7 2002.10.312003.10.23 85-bit mountain gate 6.03 3.5

8 September 2003.12 2004.1.617 Shanmen 9.25 5. 1

9 2004.10.9 2005.1.25108 Shanmen 9.05438+0 4.3

10, 2009.10.12010.2.28151-bit mountain gate 5.50000.0000000000005

Total 939 58.997 36.6052