Tsengwen Reservoir 曾文水庫 drought 🇹🇼 (2021-05-01) {aerial}

Views of the low water level and sediment removal works at Tsengwen Reservoir, Dapu Township, Chiayi County, Taiwan. It is the biggest reservoir in Taiwan by volume. The reservoir stores water for irrigation of the Chianan Plain, Taiwan's most productive agricultural region, and provides flood control along the Zengwen River. The dam supports a 50 megawatt hydroelectric power station.
Due to lack of precipitation in 2020/early 2021 (drought) the water level is rather low beginning of May 2021 (about 37 metres below max).
The reservoir has suffered severe siltation (sedimentation) from the watershed comprising steep slopes of high mountain ranges (~2500 m MSL), which has caused a large reduction in its capacity. Siltation has reduced the volume of water available for irrigation and hydropower, as well as reducing the effectiveness of the Zengwen reservoir to control flooding.
Sediment removal works at the dry lakebed adjacent to Dapu Lakeside Park can be seen in this video. An armada of excavators is loading the soil onto trucks. The fleet of trucks transport the sediment to an nearby onshore soil disposal site. The sediment removal is a huge never ending reservoir maintenance work.

Opening date: 1973
Type: Earth-fill dam
Height: 128 m
Crest length: 400 m
Effective storage capacity: 45,540,000 m³
Surface area: 17 km²
Operator: Taiwan Water Corporation

Status at filming time (2021-05-01):
Actual water level: 193.7 m
Full water level: 230.0 m
Storage ratio: 8.9 %

#Zengwen #reservoir #Taiwan #dam #lake #sediment #siltation #mountain #ZengwenRiver #WaterSupply #scenery #landscape #CivilEngineering #water #aerial #uav #drone #DapuTownship #ChiayiCounty #Taiwan #Asia

Taiwan water reservoir data:
https://water.taiwanstat.com/
https://eng.wra.gov.tw/

Music:

Stomp by Silent Partner
Youtube Audio Library License

Angel Guides by Jesse Gallagher
YouTube Audio Library License

Tratak by Jesse Gallagher
YouTube Audio Library License

Credits:
Video sniplets of the full lake
from 'The Biggest Lake in Taiwan (Twice the size of Sun Moon Lake)' by Xiaofei小飛
https://youtu.be/qGplXdYe74M