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番禺县万顷沙属低沙田地区,受潮汐影响,田面高程为-0.7～0.5米.珠江水位0～1.3米.围内渍水长期难以排泄,一年四季都受渍害.冬季水位较低,但水的咸度高达7‰,超过标准要求0.5‰十多倍,水不能吃,也不适于农田灌溉之用;汛期则受台风、海潮及洪涝威胁,围内地下水位过高,严重影响作物生长.该地区400亩水田,长期以来稻谷亩产只有300～350公斤.60年代修了电排站,初步解决了围内排渍问题.但农田还未整治,田间管理跟不上,多年来亩产徘徊在400～500公斤之间,未能达到稳产高产.
Panyu County, Wanqingsha is a low-Shatin area, affected by tides, the surface elevation of -0.7 ~ 0.5 meters. Pearl River water level of 0 to 1.3 meters. Long-term waterlogging difficult to excrete, all year round by the stain .Slew water level is low, However, the salinity of water is as high as 7 ‰, more than 10 times of the standard requirement of 0.5 ‰, which can not be eaten or irrigated by farmland. The flood season is threatened by typhoon, tide and floods. Growth of 400 acres of paddy fields in the region, long-term since the paddy yield of only 300 to 350 kg .60 years of the repair of the power station, the first solution to the problem of row around the yard, but the farmland has not remediation, field management can not keep up, over the years mu Production hovering between 400 to 500 kilograms, failed to reach steady and high yield.