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河北平原东部,俗称黑龙港地区,面积三万七千多平方公里,历来洪涝旱碱交相为害,农业产量低而不稳。这里的另一特点,就是地下水普遍有咸水层存在。由于咸水不能作为工农业水源而未被开采,故水位高,是产生涝碱灾害的重要根源。在抗旱上,为了开采深层淡水,必须穿透咸水层打深井,出现许多技术上的困难。所以,咸水的存在,对这个地区工农业的发展极为不利。
The east of Hebei Plain, commonly known as Heilonggang, covers an area of more than 37,000 square kilometers. Historically, floods, floods and droughts have been detrimental to the agricultural sector, with low and unstable agricultural output. Another feature here is that there is generally saline water in groundwater. As salt water can not be exploited as industrial and agricultural water sources, its high water level is an important source of waterlogging alkali disaster. In drought fighting, in order to exploit deep freshwater, it is necessary to penetrate deep into the saline aquifer and experience many technical difficulties. Therefore, the existence of salt water is extremely unfavorable to the development of industry and agriculture in this area.