The man-made rivers and streams are part of an irrigation project called the Gezira scheme, which the British started in the colonial era to grow cotton for export back to Europe.
人造河流是杰济拉灌溉工程的一部分，为了在这里种植棉花出口到欧洲，殖民地时期的英国人首先发起了这项工程。
It is difficult to proceed with large earthwork when the underground water level is high. So in order that project goes smoothly, underground water level decreasing by man-made is adopted.
地下水位偏高时，大型土方工程施工困难，必须采用人工降低地下水位的方法，方能确保工程顺利进行。
It is difficult to proceed with large earthwork when the underground water level is high. So in order that project goes smoothly, underground water level decreasing by man-made is adopted.
地下水位偏高时，大型土方工程施工困难，必须采用人工降低地下水位的方法，方能确保工程顺利进行。
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