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  Canal Facilities 》Jhuoshuei River Pilotage Facilities

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▌Water Fetched Directly from Jhuoshuei River without Constructing a reservoir

 The water sources of Chia-Nan Canal include Wushantou Reservoir, and Jhuoshuei River. Hachitayoichi’s idea was that the 50,000kah of land north of Chia-Nan Plain was irrigated with water from Jhuoshuei River and that the water is directly fetched. In other words, a water inlet is made to allow water to directly flow into the irrigation ditches. You may wonder why a reservoir is not built like that of Guan Tian River. The problem lies in the water quality of Jhuoshuei River. “Jhuoshui” means “turbid water” in Chinese. Since the sand content of Jhuoshuei River is rather high, the water visibility bad, thus the name “Jhuoshuei River”. If a reservoir was to be built on top of this river, chances are that it will silt-up in no time.
　

Jhuoshuei River Basin Picture 

source: Tamkang University, Water Resources Management and Policy Research Center, Water Resources Agency, Ministry of Economic Affairs,

▌Three Water inlets

Since the sand content of Jhuoshuei River is quite high, Hachitayoichi adopted the water inlet to directly fetch water. However, since direct water fetch does not solve the silt-up problem, once, the water inlet is obstructed; there will be no water for use. To solve the problem, Hachitayoichi setup 3 water inlets namely Linnei No.1 (located on Jhuoshuei River Canal, Chingshuei River), Linnei No. 2, and Chungguotz. In case one of the tributaries is obstructed, the other two are still available for water fetching. The water that enters from the three water inlets enters the conduit along the way and flow into the turbid Main canal. The water is then transported to other parts through other tributaries.

Since the Jhuoshuei River Water inlet engineering was relatively easier, it was completed in 1924. However, because the secondary canals had not been fully completed at the time, the initial irrigation area was only 5,000 kah. As the secondary canals were completed one after the other, the irrigation area gradually increased. By 1928, it had already reached 46,500 kah. This figure was one step closer to Ho Ta Ho I Chi’s estimated goal.

Beigang River conduit Engineering

  ▍Hsin Chia Elementary School ˙Houbi Township, Tainan County , Taiwan (R.O.C.)˙2008˙1024*768