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国营永乐店农場位于北京市东南郊,位处永定河冲积扇的东南前緣地带。这个农場所在的地区,旱季缺乏地上灌溉水源,秋季又多雨涝,排水不暢,地下水位升高,因此經常遭受旱涝碱的威胁。为了农业的稳产高产,該农場主要依靠打井,一方面挖掘地下水源,发展灌溉;另一方面进行井排,降低地下水位。因此井的出水量多少直接关系着井灌、井排作用的大小。在这个地区,打井深100～130米,可累积遇到
The state-run Yongle shop farm is located in the southeastern suburb of Beijing and is located in the southeastern front of Yongdinghe alluvial fan. The area where this farm is located is often threatened by droughts and dampness because of the lack of above-ground irrigation water sources in the dry season, more rain and waterlogging in autumn, poor drainage and increased groundwater table. For stable and high-yielding agriculture, the farm mainly relies on digging wells, digging underground water sources on the one hand and developing irrigation on the other; Therefore, the amount of water well directly related to well irrigation, well row size. In this area, drilling depth of 100 to 130 meters, can be accumulated encounter