According to the reporter of Lao Dong Newspaper in mid-September, the first dam on To Lich River in the downstream area of the river (in Thanh Liet Ward) has been basically completed after more than half a year of construction.
The dam on To Lich River is considered a "regulatory valve", helping to keep and regulate the river water level, especially in the dry season.
When the water flow decreases, the dam will retain part of the water to maintain the minimum flow and water level, avoiding the situation of drying up the riverbed.
Not only does the project retain water, it also contributes to improving water quality and reducing pollution by increasing flow circulation.
The dam has the same function as a spillway or a culvert with a valve, the water barrier structure of the dam is made of rubber bags connected to the dam foundation, the water level can be adjusted by pumping or discharging gas/water into the bag.
Rubber dams have many advantages compared to traditional dams such as low cost, fast construction, ability to withstand uneven subsidence and good flood discharge.
Due to the characteristics of the To Lich River with a significant slope, the difference in riverbed elevation at the starting point of Hoang Quoc Viet Street and the end point of Thanh Liet is about 2m, so the amount of water added to the river with a low flow rate is not enough to create a flow and increase water flow over the entire length of the river.
Speaking to Lao Dong Newspaper reporter, Mr. Truong Quoc Bao, Head of Yen Xa Wastewater Treatment Project Management Board (Hanoi Agricultural and Technical Infrastructure Construction Investment Project Management Board) said that the To Lich River dam opening project at Quang bridge (Thanh Liet ward) has been completed by the investor and put into operation since August 25.
According to Mr. Bao, since August 15, the construction unit has completed collecting all 245 discharge gates on the To Lich River, ensuring that wastewater is brought to the Yen Xa Wastewater Treatment Plant for thorough treatment.
"Currently, the plant is being operated and treated with a capacity of about 200,000 - 230,000m3 per day and night, ensuring the treatment of all wastewater collected from the To Lich River according to the correct process" - Mr. Bao said.
Nearly a week ago, water from West Lake was officially added to "revive" the To Lich River through this separate water pipeline including 2 HDPE pipes parallel to the D1200 diameter.
The replenishment of water from West Lake can be operated regularly on a cyclical basis and ensures that the water from West Lake does not converge with wastewater in TE3 canal.
From now until September 20, the Project Management Board will complete the final item of replenishing water after treatment from Yen Xa Wastewater Treatment Plant to To Lich River to revive this river.
