Project summary
In 1980, due to the difficulties of economic development, and the problem of water demand in Yunlin area, the Water Resources Planning Institute took charge of the “Small and Medium Reservoir Planning in Yunlin Area”, and investigated the comprehensive exploration of water resources in Yunlin, finally completed the planning of small and medium-sized reservoirs in Yunlin area. In 1992, for the purpose of the public water in Yunlin area and the urgent needs for industrial water of the Sixth Naphtha Cracker and Yunlin Outlying Islands Industrial Zone, the reservoir water resources development survey in Yunlin area were carried out, and the feasibility planning of Hushan and Hunan Reservoirs in Yunlin County was completed in 2000.
This project was approved by the Executive Yuan in 2001. The total budget is about NTD16.244 billion. The dam construction was completed on 5th July 2014. The reservoir began to store water on 2nd April 2016, and began to operate on 5th July 2016. The location of the reservoir is in Fig. 1.
Major events
Table 1: The major events of the Hushan Reservoir1992 | The Xiluo engineering team was established. |
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2000 | The environmental report of Hushan and Hunan Reservoirs Project was approved by the Environmental Protection Administration. |
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2001 | The Executive Yuan approved the Hushan and Hunan Reservoirs Project. In the same year, the Executive Yuan agreed to rename the "Hushan and Hunan Reservoirs Project" as "Hushan Reservoir Project". |
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2002 | The Hushan Reservoir Project was approved for development by the Ministry of the Interior. |
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2004 | The member of the Control Yuan went to the Hushan Reservoir to observe the protective forest canceling problem and the Fairy Pitta conservation problem. |
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2006 | The estimates of Hushan Reservoir Project in 2006 were approved by the Legislative Yuan. |
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2008 | Guiding the water of the Nanshenkeng River into Hunan Dam Tunnel was completed. |
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2011 | The Environmental Protection Administration won the lawsuit of the Hushan Reservoir Project. |
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2014-2015 | The headrace construction of the Hushan Reservoir Dam Project was completed. |
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2016 | The Hushan Reservoir Management Center was established on 6th January 2016. The pipeline test of the downstream of the Hushan Reservoir was completed on 9th August 2016. The Hushan Reservoir began to store water on 2nd April 2016. The Hushan Reservoir began to operate on 5th July 2016. |
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Planning process and results
The work team of planning
The Hushan Reservoir planning was conducted by the Water Resources Planning Institute, the Hydrotech Research Section assisted with the hydraulic model test, the River Management Section operated downstream river improvement, the Geotech Research Section and the Central Geological Survey executed dam material investigation, geological survey and drilling. Related content is shown in Fig. 2.
The process of planning
- Dam location plan
- The Hushan main dam
The Hushan reservoir is an off-stream reservoir. In addition to the runoff from the catchment, we use the Tongtou Weir to obtain water from the Qingshui River. The height of the main dam is 75 meters, the elevation is 215 meters, and the width of the dam is 570 meters.
- The Hushan minor dam
The Hushan minor dam is located in the southwest of the main dam.
- The Hunan dam
After the suggestion of investigation and planning team in May 1994, it proposed to make the dam axis of Hushan main dam, Hushan minor dam and Hunan dam connected into a line, as shown in Fig. 3.
- The transbasin water diversion project
There are six options for the trans-basin water diversion project. The routes of the diversion projects are along the river line, as shown in Fig. 4. After evaluation, the option 5 is selected.
- Planning profiles
The relevant dam and weir data are shown in Table 2. The layout plan is detailed in Fig. 5. After the reservoir is completed, the completed view of Hushan Reservoir is in Fig. 6.
Construction | Item | Content |
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Table 2: ProfilesReservoir | Catchment area | 6.58 square kilometers |
Full water level | EL.211.5 meters |
Full water level area | 2.018 hectares |
Reservoir minimum elevation | EL.165.0 meters |
Water storage | 53.47 million cubic meters |
Dam | Dam type | Central clay core zone and rolling stone dam |
Dam top elevation | EL.216 meters |
Dam top length | The Hushan main dam: 578 meters The Hushan minor dam: 334 meters The Hunan dam: 609 meters |
Dam top width | 10 meters |
Maximum height of the dam | 75 meters |
Dam volume | 12.797 million cubic meters |
Spillway | Type | Spillway connected with water purification pool |
Flood discharge | 509 cms |
Dome elevation | EL.211.5 meters |
Water intake | Water intake type | Oblique Layering |
Water intake elevation | EL.180、165 meters |
Water intake discharge | - Public water supply channel 12.27 cms
- The river discharges 1.00cms
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Cross-territorial water diversion facilities | Barrage | - Location: move down 40 meters
- Type: straight down
- Elevation: EL.222 meters, Length: 91 meters
- Water intake: 20cms
- Flood discharge: 6,530 cubic meters / sec
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Cross-territorial water diversion channel | - Open channel: 85 meters, Closed conduit: 56 meters, Inverted siphon: 126 meters, PCCP: 618 meters, tunnel: 2,825 meters
- Water diversion volume: 20cms
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Downstream connecting pipe | - Water purification plant: add the pretreatment equipment of Linnai and Hushan water purification plant
- Infuse into the pre-processing pool
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