Environment

Da Nang: Dams built to deal with lack of fresh water

The central city has begun construction of a steel dam – the second of its kind – on the lower Cam Le River to reduce salinity and deal with serious water shortages in the dry season this year.
Da Nang: Dams built to deal with lack of fresh water ảnh 1Work starts on the second temporary dam on the Cam Le  River in Da Nang. The dam will help reduce high salinity and a lack of fresh water for the city. (Photo: VNA)

Da Nang (VNS/VNA) - The central city has begun construction of asteel dam – the second of its kind – on the lower Cam Le River to reducesalinity and deal with serious water shortages in the dry season this year.

General director of the Da Nang Water Supply Company (DAWACO), Ho Huong, told VietNam News the project was urgently needed to solve serious saline intrusion thisyear.

He said the city would face water shortages this summer when the upstream flowwas forecast to be lower between April and September.

Huong said the two temporary dams, which would cost a total of 13 billion VND (565,000USD), would help the city collect enough fresh water to deed the Cau Do waterplant.

He said the first 180m long dam, which was completed in late January, hadhelped reduce salinity in the river to less than 1,000mg of salt per litre – aratio possible for fresh water collection.

The second dam, which started construction on Monday, would help lower theratio to between 500mg and 600mg per litre.

According to the regional meteorological station, water flow from upstreamwould fall from 40 to 90 percent, and salinity would reach more than 6,000mgsalt per litre – higher than the worst salinity recorded in 2019 (5,109mg perlitre).

Meanwhile, the city has also upgraded the An Trach pumping station to collectenough fresh water to supply the city’s demand of 310,000cu.m each day.

Experts from DAWACO said the steel panel structure was used to deal withsalinity in the Mekong Delta River, and could be rapidly deployed and removed.

Earlier this month, Da Nang asked management boards of the A Vuong and Dak Mi 4hydro-plants to discharge water from their reservoirs to save the city fromserious salinity that lasted 36 days.

Last year, the city’s water supply could only meet 70 percent of demand due tohigh salinity at the Cau Do water plant – the main source of fresh water for 1million residents and tourists.

Water shortages in Da Nang have been occurring for several years now, resultingfrom deforestation, low rainfall and the operation of hydropower plants on theVu Gia–Thu Bon river system covering Quang Nam and Da Nang./. 
VNA
#construction#steel dam#water shortage#salinity#saline intrusion#upstream flow#water plant#fresh water#Da Nang#Vietnamplus#Vietnam News#Vietnam News Agency
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