BEIJING, Jan. 26 -- Guangdong (China) Astronomical Society forecast that affected by astronomical, hydrological and meteorological factors, the Pearl River Delta will witness another big salt tide between Jan. 25 and 30.

    A big salt tide with a chloride content of more than 6,000 milligrams per liter will strike Dayongkou water gate in the Modaomen channel for several days in a row. As a water diversion project known as "control the salt tide and replenish fresh water" is under implementation on the Pearl River in mid January, relevant departments have reserved sufficient fresh water. Despite its truculent arrival, this big salt tide will not affect water supply and drinking water safety in Zhuhai, Zhongshan and Panyu of Guangdong Province.

    Astronomical factors of this big salt tide include: the moon will move to above the Tropic of Capricorn on Jan. 25 and cause a Tropic tide; the sun, the moon and the earth will appear in a beeline on Jan. 29 and form a Syzygy tide; the moon will be the closest to the earth on Jan. 30 and cause a Perigean tide. These three tides will converge and overlap in a short period, and thus push the salt tide up in the Pearl River prominently.

    This massive salt tide is expected to abate obviously after Jan. 31. Future salt tide situation in the Pearl River Delta is subject to the rainfall around the Pearl River drainage area.

    (Source: Chinanews.cn)