Undergraduate

WATER SUPPLY AND SEWERAGE SYSTEM

1. WATER SUPPLY SYSTEM

body of wet system turn in system of Da lat was built in the early period of city formation.

In the past, the citys water furnish was resolved by using a portion of the Cam Ly Stream, finished Than that Lake and Xuan Huong Lake. After 1975, water bring was supplemented with Chien Thang Lake and Dan Kia Lake. Currently, Da Lat city is supplied by three water coiffures in Than Tho Lake, Xuan Huong Lake and Golden Stream, with a total maximum substance of 31.000m3.

1.1 fundamental law:

The first water supply plant came into operation in 1920. It only had small capacity to ensure clean water supply for some buildings and sparse citizens around the Great Lake. This plant was dismantled and there is no specific document rough it.

1.1.1 The period before 1945:

In 1937, Than Tho Lake was built in the upper Cam Ly Stream. This is not only a scenic lake notwithstanding also a reservoir to ensure water supply for Da Lat city. In 1937, the Public Works incision established a plan to develop the water supply and distribution systems. Than Tho Lake water plant, built in 1938, has the largest capacity of 4,300 m3 per day. This water plant treats water from Than Tho Lake. It deposits sediment, purifies, sterilizes and store water in a 300 m3 tank.



Then water is wield to three connected tanks with total capacity of 1,875 m3; one tank placed in the Governors Palace, another one near the city manager Office (Resimaire 1) and the last one in Pasteur Institute (Calypso).

plan - Water plant in Than Tho Lake

From these tanks, water is supplied to extravagantly areas of the city. The highest area is provided by a booster pumping station. The next grade was completed in 1943. It included the construction of a master(prenominal) tank (Resimaire 2) and two secondary tanks (West lake 1, 2), along with the development of sewerage networks.

The amount of water consumption in 1938 was 235,797 m3; in 1939, it was 191,819 m3.

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